Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Single Deck Rotary Switches
SERIES 50 SERIES 51
0.5" Diameter, 200mA,
.698" Behind Panel
FEATURES
• Optional Complete Seal for
PC Board Assembly and Cleaning
• Small 1/2" Diameter
• Choice of 22.5°, 30°, 36°, 45°, 60°
and 90° Angles of Throw
in inches (and millimeters)
PC Mount Style
.250±.015
(6,35±0,38)
A
.375±.015
(9,53±0,38)
.125±.015
(3,18±0,38)
.250±.015
(6,35±0,38)
DIMENSION
D
POS. 1
OPTIONAL
PANEL SEAL
GASKET
Ø.125 +.001- .002
(3,18 + 0,03 -0,05)
22.5°
30°
36°
Angle of
Throw
Angle
A
45° 112.5°
60° 120°
90° 135°
101.25°
105°
108°
Dimension
Series 50
D
.500 ± .015
(12,70 ± 0,38)
PC COMMON DETAIL
All angles of throw, except 22.5°
.171 ± .015
(4,34 ± 0,38)
Ø .025 ± .002
(0,64 ± 0,05)
Series 51
.562 ± .015
(14,27 ± 0,38)
Dimension
B
Style T
.576 ± .015
(14,63 ± 0,38)
All Others
All 22.5°
.537 ± .015
(13,64 ± 0,38)
.537 ± .015
(13,64 ± 0,38)
SOLDER LUG TERMINAL DETAIL
All angles of throw, except 22.5°
.250±.015
(6,35±0,38)
Dimension B
.375±.015
(9,53±0,38)
.064 ± .005
(1,63 ± 0,13)
.020 ± .005
(0,51 ± 0,13)
Dimension C
.250±.015
(6,35±0,38)
Front view same as
PC Mount style.
TERMINAL SEALANT
IN STYLE T
.065 ± .003
(1,65± 0,08)
Solder Lug Style
Ø.125 + .001 - .002
(3,18 + 0,03 - 0,05)
TERMINAL
SEALANT
IN STYLE "T"
.020 ± .005
(0,51 ± 0,13)
.020 ± .003
(0,51 ± 0,08)
Angle
A
COMMON Ø .025 ± .002
(0,64 ± 0,06) AND EXTEND
TO SAME PLANE AS
POSITION TERMINALS
PC TERMINAL DETAIL
All angles of throw, except 22.5°
.125 ± .015
(3,18 ± 0,38)
Dimension E
.032 ± .004
(0,81 ± 0,10)
2 1 10 9
GRAYHILL
Rotary Switches
Grayhill part number and date code
marked on label. Customer part
number marked on request. Military
part number marked when required.
TERMINALS ARE
.016 ± .003 (0,41 ± 0,08) SQ.
1/4-28 UNF-2A
THREAD
.093 ± .005
(2,36 ± 0,13)
Angle of
Throw
.171 ± .015
(4,34 ± 0,38)
.125 (3,18)
REF.
GRAYHILL
.203 ± .003
(5,16 ± 0,08)
ACROSS
FLATS
Side View 22.5°
All others as shown at left
DIMENSION "B"
2 1 10 9
DIMENSIONS
• Up to 4 Poles on 1 Deck
• Up to 16 Positions Per Switch
• PC or Solder Lug Termination
• Positive Shaft Grounding for
EMI/RFI Shielding
.065 ± .003
(1,65 ± 0,08)
SOLDER LUG TERMINAL DETAIL 22.5°
.064 ± .005
(1,63 ± 0,13)
.016 ± .004
(0,41 ± 0,10)
TERMINAL
SEALANT
IN STYLE "T"
1/4-28 UNF-2A
THREAD
Dimension
30°, 36°, 45°, 60°, 90°
22.5°
B
.658 ±.015
(16,71 ±0,38)
.591±.020
(15,01±0,50)
C
.234 ±.015
(5,94 ±0,38)
.200±.015
(5,08±0,38)
E
.153±.015
(3,89±0,38)
.12±.015
(3,05±0,38)
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
.021 ± .004
(0,53 ± 0,10)
.046 ± .004
(1,17 ± 0,10)
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Single Deck Rotary Switches
CIRCUIT DIAGRAMS AND REAR VIEWS: Solder Lug and PC Mount
Rear View
SOLDER LUG
COMMON TERMINAL
(1 POLE)
.382 ± .015 (9,70 ± 0,13)
DIAMETER CIRCLE OF
TERMINAL CENTERS
.156 ± .015
(3,96 ± 0,13)
11.25˚
POS. 1
22.5˚
LOCATION
OF COMMONS
2 POLES
Circuit as Viewed From Shaft End
PC MOUNT
.500 ± .015
(12,7 ± 0,13)
DIA. CIRCLE
OF CENTERS
11.25˚
POS. 1
22.5˚
.156 ± .015
(3,96 ± 0,13)
C2
8
6
9
POLE 1
POS. 1
POLE 1
FOUR POLES
THREE POLES
Dimension A, diameter circle of common centers,
is .175 (4,45) for Solder Lug and .232 (5,89) for PC.
6
1
6
.175 ± .005
(4,45 ± 0,13)
DIAMETER
CIRCLE OF
COMMON
CENTERS
9
7
C2
6
5
1
C2
6
2
5
9
5
1
5
1
3
2
8
9
10
C2
1
C1
4
2
ONE POLE
36° Angle
of Throw
2
3
TWO POLES
7
7
6
8
1
4
12
C1
7
5
11
C4
4
30° Angle
of Throw
FOUR POLES
6
5
8
C2
C1
4
2
3
10
C3
10
6
2
3
9
8
C1
3
1
4
7
6
LOCATION OF COMMONS
2 POLES
45˚
11
3
12
TWO POLES
12
8
7
4
22.5˚
POS. 1
5
C3
4
11
C1
THREE POLES
LOCATION OF COMMONS
2 POLES
COMMON TERMINAL (1 POLE)
.320 ± .015 (8,13 ± 0,38) DIAMETER
CIRCLE OF TERMINAL CENTERS
10
10
1
45° Angle
of Throw
2
3
TWO POLES
ONE POLE
COMMON TERMINAL (1 POLE)
.320 ± .015 (8,13 ± 0,38) DIAMETER
CIRCLE OF TERMINAL CENTERS
5
5
6
4
4
30˚
1
3
POS. 1
LOCATION OF COMMONS
2 POLES
60˚
6
C2
.125 ± .015
(3,18 ± 0,38)
C1
3
1
2
2
ONE POLE
TWO POLES
60° Angle
of Throw
COMMON TERMINAL (1 POLE)
LOCATION OF COMMONS
2 POLES
.320 ± .015 (8,13 ± 0,38)
DIAMETER CIRCLE OF
TERMINAL CENTERS
3
4
3
4
90° Angle
of Throw
C2
.125 ± .015
(3,18 ± 0,38)
C1
2
45˚
1
ONE POLE
POS. 1
2
1
TWO POLES
90˚
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
.125 ± .015
(3,18 ± 0,38)
.125 ± .015
(3,18 ± 0,38)
9
C2
2
3
3
5 4
8
ONE POLE
.320 ± .015 (8,13 ± 0,38) DIAMETER
CIRCLE OF TERMINAL CENTERS
36˚
11
7
COMMON TERMINAL (1 POLE)
18˚
POS. 1
2
6
22.5° Angle
of Throw
ONE POLE
12
4
15
16
1
7
7
LOCATION OF COMMONS
2 POLES
DIM. A ±
.005 (0,13)
10
14
8
3
5 4
8
POS. 1
1
12 13
11
10
9
2
7
5
30˚
15
16
C1
8
.156 ± .005 (3,96 ± 0,13)
15˚
14
LOCATION
OF COMMONS TWO POLES
2 POLES
COMMON TERMINAL
(1 POLE)
COMMON TERMINAL (1 POLE)
.382 ± .005 (9,70 ± 0,13)
DIAMETER CIRCLE OF
TERMINAL CENTERS
POS. 1
12 13
11
10
9
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Single Deck Rotary Switches
SPECIFICATIONS
Military Qualification
The dimensions for qualified switches are
the same as those indicated in the drawings
of standard switches. Switches with standard
variations, such as shaft and bushing length,
which do not affect switch performance, can be
marked as qualified product. Contact Grayhill
for complete information on variations.
Electrical Ratings
Life Expectancy: With the limiting criteria stated
here, the Series 50 and 51 with non-shorting
contacts will switch the following loads at
atmospheric and reduced pressures for 25,000
cycles of operations. One cycle is 360° rotation
clockwise and 360° return.
Materials and Finishes
Switch Base: Thermoset
Detent Rotor: Nylon
Shaft, Stop Blades, Stop Arm, Thrust washer,
and Retaining Ring: Stainless steel
Detent Balls: Steel, nickel‑plated
Bushing: Zinc, tin‑zinc plated
Detent and Contact Springs: Stainless steel
Common Ring: Brass, gold‑plated over silver
At 85°C, atmospheric pressure
plate.
200 mA,
28 Vdc resistive
Terminals: Brass, gold‑plated over silver plate
150 mA, 115 Vac resistive
and nickel plate
30 mA,
28 Vdc inductive
Rotor Contact: Precious metal alloy, gold‑plated
100 mA,
28 Vdc lamp load
Panel Seal: Silicone rubber
75 mA, 220 Vac lamp load
Shaft Seal: Fluorosilicone
At 25°C, reduced pressure (70,000 feet)
Mounting Nuts: Brass, tin-zinc plated Mounting
Hardware: One mounting nut .089" thick by .375"
200 mA,
28 Vdc resistive
across flats and one internal tooth lockwasher are
150 mA, 115 Vac resistive
supplied with the switch. Maximum Mounting
75 mA, 220 Vac resistive
Contact Resistance: 20 milliohms maximum, Torque: 15in-lbs
(10 milliohms initially).
Rotary Switches
36°, 45°, 60°, 90° (Series 50): The C and M
style switches are qualified to MIL‑S‑3786/20.
They include the following:
Solder lug or PC terminals
With or without panel seal
Series 50 qualified switches may be ordered
by the ‘M’ number or by the Grayhill part
number.
30° (Series 51): The C and M style switches
are qualified to MIL‑S‑3786/35. They include
the following:
Solder lug or PC terminals
With or without panel seal
Insulation Resistance: 1,000 Mohms
Series 51 qualified switches may be ordered
minimum between mutually insulated parts.
by the ‘M’ number or by the Grayhill part
Voltage Breakdown: 600 Vac minimum
number.
between mutually insulated parts at standard
atmospheric pressure.
Life Expectancy: Listed for the voltage source
and make and break current levels. Contact
Grayhill for more information if any of the
following is true: the life limiting criteria are
more critical than those listed; longer operation
is required; a larger make and break current is
required; the operating environment includes
elevated temperatures or reduced pressures.
Contact Carry Rating: Switch will carry
6 amperes continuously with a maximum
contact temperature rise of 20°C.
Additional Characteristics
Contact Type and Forces: Shorting or non‑
shorting wiping contacts with over 80 grams of
contact force.
Shaft Flat Orientation: Flat opposite
contacting position of pole number one (see
circuit diagrams).
Terminals: Switches have the full circle of
terminals, regardless of number of active
position.
Stop Strength: 7.5 pound‑inches minimum
Rotational Torque: 8–24 ounce‑inches,
depending on the number of poles.
Operating Temperature Range (Standard
Style): -40 °C to +85 °C
Operating Temperature Range (MILDTL-3786): -65 °C to +85 °C
RECOMMENDED PANEL CUTOUT
Ø0.380
1/8"Shaft
Ø0.254
Ø0.280
"E" Style
POS.1
POS.1
0.208
PROCESS SEALED–Style T
Switch can be mounted on PC board with other
components and subjected to wave soldering
and conventional board cleaning techniques.
No secondary wiring or soldering is necessary.
"K" Style
POS.1
0.350
0.240
1/4" SHAFT: Style K
Bushing is o-ring sealed; epoxy potting seals the
terminals and the rear of the switch. Designed
for PC assembly, this sealing technique can
also be applied to solder lug terminal switches.
A bushing to panel seal can also be added to
the process sealed versions. Military qualified
versions are available, see ordering information.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
.250
±.015
.219
±.004
.250 +.001
-.002
.340
±.005
.250
±.015
.375
±.015
3/8-32 UNEF-2A
THREAD
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Single Deck Rotary Switches
SUGGESTED ADJUSTABLE STOP
SUBSTITUTION GUIDE
Adj. Stop
Fixed
Stop
Style
Style
Equivalent
50D
50A
50C
50CD
50CP
50CDP
50M
50CD*
50MP
50CDP*
50P
50DP
50S
50D*
50SP
50DP*
Fixed
Stop
Style
Adj. Stop
Style
Equivalent
51A
51C
51CP
51M
51MP
51P
51S
51SP
51D
51CD
51CDP
51CD*
51CDP*
51DP
51D*
51DP*
ADJUSTABLE STOPS: Style D
Adjustable stops permit the user to set and reset
the number of positions per poles. Shown in
the diagram, a plastic washer can be removed
to reveal slots at the base of the bushing. Stop
blades can be inserted into the appropriate
slots to limit switch rotation. Positions per pole
configuration can thus be changed to meet the
needs of the application. Dimensions are the
same as the fixed stop version, when plastic
washer is in place. Most desirable for prototype
work. Readily available from local distributor.
*Form fit and function equivalents, but not watertight sealed
to the panel.
Stop
Blade
Slots
Plastic
Washer
Stop
Blades
ACCESSORY: Non-Turn Washers
In Inches (and millimeters)
SHAFT AND PANEL SEAL: Styles S and M
Shaft and panel seal switches
are watertight to the panel. They
are not totally process sealed
like the Style “T”. Panel is sealed
by a gasket at the base of the
bushing. Shaft is sealed by an
O-ring inside the bushing. After
mounting, seals do not alter
switch dimensions. See Style
“S” (standard switches) and
Style “M” (military switches)
in the Choices and Limitations
chart.
SEAL
Form, fit and function equivalent
to standard shaft switches.
The dimensions shown have
evolved as the most popular
for this type of switch. See
Style “B” in the Choices and
Limitations chart. Previous
users may have ordered these
switches by a non-descriptive
part number containing a “Y”.
Contact Grayhill, if in doubt
about a cross-reference.
.125±.015
(3,18±0,38)
.032±.005
(0,81±0,13)
"A"
.050±.005
(1,27±0,13)
METRIC SHAFT AND BUSHING: Style E
9,53
±0,38
6,0±0,08
"A"
3,15
±0,12
7,0
±0,51
6,35
±0,38)
4,0
±0,03
Metric standard dimensions
for the shaft and bushing are
shown in the drawing. Other
dimensions approximately the
same as shown in dimensional
drawing. Contact Grayhill for
exact dimensions. See Style “E”
in the Choices and Limitations
chart.
.025
± .001
(0,64
± 0,03)
90° ± 1°
.250 ± .003
(6,35 ± 0,08)
.015
(0,38)
RADIUS
MAX.
.125
± .005
(3,16
± 0,13)
.060 ± .001
(1,52 ± 0,25)
Part No. 50J1066
Cut round hole for the bushing and for
the non-turn tab. Washer fits the double
D bushing flats. Washer is sold only when
accompanied by an order for a like number
of switches. Washer is 302 stainless steel.
Dimensions are in millimeters
11,13
± 0,13
DIA.
0,64
± 0,05
90° ± 1°
5,08
± 0,05
CL
1,57 ± 0,08
.015
(0,38)
RADIUS
MAX.
2,36
± 0,13
Part No. 71J1103
Designed to fit the double flatted bushing
of the metric dimensioned bushing, this
non-turn washer permits a round hole for
the bushing and the tab while still preventing
switch rotation. Washer is only sold when
accompanied by a like number of switches.
Washer is 302 stainless steel.
M7 x 0,75
Part No. 50J5140-4
Designed to fit the single flatted bushing of
the "K" style switches, this non-turn washer
prevents switch rotation when using a full
round hole in the panel. Washer is only
sold when accompanied by a like number
of switches. Washer is 302 stainless steel.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
SCREWDRIVER SLOTTED SHAFT: Style B
.400
± .005
DIA.
(10,16
± 0,13)
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Single Deck Rotary Switches
CHOICES AND LIMITATIONS: Series 50
A = Standard, 1/8" Shaft
B = Screwdriver Slot Shaft
C = Military, Without Panel Seal
D = Adjustable Stop (Adj. Stop)
P = PC Mount Terminals
S = Shaft/Panel Seal (S/P Seal)
T = Process Sealed
E = Metric, 4mm Shaft
K = 1/4" Shaft
M = Military
Standard Style
Style Choices1
Series Std., 1/8" Shaft
1/4" Shaft
Metric, 4mm Shaft Terminals
A
AT
B
BS
BST
BT
D
S
ST
K
KS
KST
KT
KB
KBS
KBST
KT
BP
BPT
BSP
BSPT
DP
P
PT
SP
SPT
KP
KPT
KSP
KSPT
KBP
KBSP
KBSPT
KBT
E
ES
EST
ET
EB
EBS
EBST
EBT
Solder
Lug
50
EP
EPT
ESP
ESPT
EBP
EBSP
KBSPT
EBT
Angle
of
Throw
Number
of
Poles
Number of
Positions
Per Pole
Shorting or
Non-Shorting
Contacts
Rotary Switches
36°
1
2
02 thru 10
02 thru 05
N or S
N or S
45°
1
2
02 thru 08
02 thru 04
N
N
60°
1
2
02 thru 06
02 or 03
N
N
90°
1
02 thru 04
2 02
N
N
36°
1
2
02 thru 10
02 thru 05
N or S
N or S
45°
1
2
02 thru 08
02 thru 04
N
N
60°
1
2
02 thru 06
02 or 03
N
N
90°
1
02 thru 04
2 02
N
N
PC Mount
Military Style
Style Choices
Series Std., 1/8" Shaft
1/4" Shaft
Metric, 4mm Shaft Terminals
C
CB
CBT
CD
CT
M
MB
MBT
MT
KM
KMB
KMBT
KMT
EM
EMB
EMBT
EMT
Solder
Lug
50
CBP
CBPT
CDP
CP
CPT
MBP
MBPT
MP
MPT
KMBP
KMBPT
KMP
KMPT
EMBP
EMBPT
EMP
EMPT
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
Angle
of
Throw
Number
of
Poles
Number of
Positions
Per Pole
Shorting or
Non-Shorting
Contacts
36°
1
2
02 thru 10
02 thru 05
N or S
N or S
45°
1
2
02 thru 08
02 thru 04
N
N
60°
1
2
02 thru 06
02 or 03
N
N
90°
1
02 thru 04
2 02
N
N
36°
1
2
02 thru 10
02 thru 05
N or S
N or S
45°
1
2
02 thru 08
02 thru 04
N
N
60°
1
2
02 thru 06
02 or 03
N
N
90°
1
02 thru 04
2 02
N
N
PC Mount
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Single Deck Rotary Switches
CHOICES AND LIMITATIONS: Series 51
A = Standard, 1/8" Shaft
B = Screwdriver Slot Shaft
C = Military, Without Panel Seal
D = Adjustable Stop (Adj. Stop)
P = PC Mount Terminals
S = Shaft/Panel Seal (S/P Seal)
T = Process Sealed
E = Metric, 4mm Shaft
K = 1/4" Shaft
M = Military
Standard Style
Style Choices1
Series Std., 1/8" Shaft
1/4" Shaft
Metric, 4mm Shaft1 Terminals
A
B
S
BS
51
AT
BT
ST
BST
A
AT
B
BS
BST
BT
D
S
ST
P PT
BP BPT
SP SPT
BSP BSPT
SEE BELOW
K
KS
KST
KT
E
ES
EST
ET
Solder
Lug
SEE BELOW
PC Mount
SEE BELOW
KP
KPT
KSP
KSPT
EP
EPT
ESP
ESPT
PC Mount
22.5°
30°
22.5°
30°
Number
of
Poles
Number of
Positions
Per Pole
Shorting or
Non-Shorting
Contacts
1
2
02 thru 16
02 thru 08
N or S
N or S
1
2
3
4
02 thru 12
02 thru 06
02 thru 04
02 or 03
N or S
N or S
N or S
N or S
1
2
02 thru 16
02 thru 08
N or S
N or S
1
2
3
4
02 thru 12
02 thru 06
02 thru 04
02 or 03
N or S
N or S
N or S
N or S
Military Style
Style Choices
Series Std., 1/8" Shaft
1/4" Shaft
Metric, 4mm Shaft Terminals
51
1
C
CB
CBT
CD
CT
M
MB
MBT
MT
KM
KMB
KMBT
KMT
EM
EMB
EMBT
EMT
CBP
CBPT
CDP
CP
CPT
MBP
MBPT
MP
MPT
KMBP
KMBPT
KMP
KMPT
EMBP
EMBPT
EMP
EMPT
Angle
of
Throw
Solder
Lug
30°
PC Mount
30°
Number
of
Poles
Number of
Positions
Per Pole
Shorting or
Non-Shorting
Contacts
1
2
3
4
02 thru 12
02 thru 06
02 thru 04
02 or 03
N or S
N or S
N or S
N or S
1
2
3
4
02 thru 12
02 thru 06
02 thru 04
02 or 03
N or S
N or S
N or S
N or S
Contact Grayhill if 1/4" or metric shaft required with a 22.5° angle of throw.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
BP
BPT
BSP
BSPT
DP
P
PT
SP
SPT
Solder
Lug
SEE BELOW
Angle
of
Throw
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Single Deck Rotary Switches
ADDITIONAL FEATURES
Economy keylock switch, isolated position, spring
return, and coded switches are available in similar
series. See Keylock and Special Function Rotary
Switch sections.
Available from your local Grayhill Distributor.
For prices and discounts, contact a local Sales
Office, an authorized local Distributor, or Grayhill.
ORDERING INFORMATION: Series 50
Series: Series 50 (36°, 45°, 60°, or 90°)
Style*: Letters from Choices Chart
Angle of Throw: 36, 45, 60, or 90
Stop Arrangement: Needed only with 1 pole switches with
maximum positions. Leave blank for continuous rotation;
add F for fixed stop.
Type of Contacts: N = Non-shorting, S = Shorting
Positions Per Pole: 02 as a minimum to the maximum allowable
for the angle of throw and the number of poles per the Choices Chart.
Use Letters AJ in this location if adjustable stop switch is ordered.
Poles per Deck: See chart
Number of Decks: 01 only
50AT36–01–1–10N–F
* All rotary switches that are required to have military designated markings and testing adhering to MIL-3786 are to be ordered by specifying
the military part number identified on the appropriate slash sheet.
Rotary Switches
ORDERING INFORMATION: Series 51
Series: Series 51 (30°; 22.5°)
Style*: Letters from Choices Chart
Angle of Throw: Use 22 (for 22.5°), 30
Stop Arrangement: Needed only with 1 pole switches with
maximum positions. Leave blank for continuous rotation;
add F for fixed stop.
Type of Contacts: N = Non-shorting, S = Shorting
Positions Per Pole: 02 as a minimum to the maximum allowable
for the angle of throw and the number of poles per the Choices Chart.
Use Letters AJ in this location if adjustable stop switch is ordered.
Poles per Deck: See chart
Number of Decks: 01 only
51SPT30–01–1–12S–F
* All rotary switches that are required to have military designated markings and testing adhering to MIL-3786 are to be ordered by specifying
the military part number identified on the appropriate slash sheet.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Mechanical Encoders
Series 51
Binary or Binary
Complement Code
Features
• PC Mount, 30° Angle of Throw
• 2 to 12 Positions
• .562" Diameter, 200 mA
• Shaft and Panel Seal
• Adjustable Stop Versions
Dimensions in Inches (and millimeters)
.250 – .015
(6,35 – 0,38)
.537 + .020 .030
(13,64 + 0,51 0,76)
.125 + .015
.020
(3,18 + 0,38
0,51)
.375 – .015
(9,53 – 0,38)
.125 – .002
(3,18 – 0,05)
.203 – .003
(5,16 – 0,08)
COMMON
POLE 2
COMMON
POLE 3
1/4-28 UNF-2A
THREAD
.562 + .025
.015
(14,27 + 0,64
0,38)
pC TerMinAl DeTAil
.125– .015
(3,18 – 0,38)
COMMON
POLE 1
.382 (9,70) TERMINAL
CIRCLE OF CENTERS
pC CoMMon DeTAil
.020 – .003
(0,51 – 0,08)
.125– .015
(3,18 – 0,38)
.062 – .004
(1,57 – 0,10)
.020 – .003
(0,51 – 0,08)
.025 – .002
(0,64 – 0,05)
See circuit
diagrams for
omitted terminals.
All switches are provided with PC mount terminals.
Grayhill part number and date code marked on label. Customer part number marked on request.
CIRCUIT DIAGRAMS
Switch is viewed from the shaft end and shown
in switch position number 1, which is decimal
number zero and BCD number zero.
Indicates Terminal is present.
Indicates Terminal is omitted.
Note: Connections must be made on
PC board to generate code output.
Switch position numbers do not correspond to
the decimal input or binary output.
See Truth Tables.
BCD
BCD Complement
TIED TOGETHER
ON PC BOARD
1 OUTPUT
4 OUTPUT
3
4
2 C1
ROTATING
CONTACTS
TIED TOGETHER
ON PC BOARD
5
1
TIED TOGETHER
ON PC BOARD
6
C2
8 OUTPUT
11
C3
10
COMMON
TIED TOGETHER
ON PC BOARD
ROTATING
CONTACTS
3
2 C1
5
1
11
8
8 OUTPUT
7
2 OUTPUT
8
C3
10
TIED TOGETHER
ON PC BOARD
TIED TOGETHER
ON PC BOARD
6
C2
9
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
4
12
7
12
1 OUTPUT
4 OUTPUT
2 OUTPUT
9
TIED TOGETHER
ON PC BOARD
COMMON
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Optical and Mechanical
Encoders
CL
SHAFT
FLAT
6 5
.250 + .020 .015
(6,35 + 0,51 0,38)
.232 (5,89)
COMMON CIRCLE
OF CENTERS
8 7
105¡
.035 (0,89)
REF.
GRAYHILL
.093 – .005
(2,36 – 0,13)
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Mechanical Encoders
Truth tables
Binary Code Decimal
Binary Code Decimal Complement
Dec. Switch
2nd Output Terminal
No. Pos'n.* Pin**
1
2
4
8
Dec. Switch
2nd Output Terminal
No. Pos'n.* Pin**
1
2
4
8
0
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8
9
10
11
12
4-5
5-6
6-7
7-8
8-9
9-10
10-11
11-12
12-1
1-2
2-3
3-4
0
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8
9
10
11
12
12-1
1-2
2-3
3-4
4-5
5-6
6-7
7-8
8-9
9-10
10-11
11-12
Options
Adjustable Stops
Set and reset stops to limit rotation. All
dimensions are the same as for fixed stop
switches. Switches are shipped with the stop
blades located to limit rotation to 11 switch
positions. For continuous rotation, remove both
blades. For limited rotation, remove the 2nd
(clockwise) blade and move it to the hole located
between the positions shown in the Truth Tables.
Removal of a plastic washer provides access to
the blades and slots. Adjustable stop versions
are available in unsealed styles only.
Shaft and Panel Seal
Switches are available in sealed or unsealed
styles. For sealed style, the panel is sealed by
an o-ring at the base of the bushing. The shaft
is sealed by an o-ring inside of bushing. After
the switch is mounted, seals do not alter the
dimensions of the unsealed style.
Indicates contact made to common
* The switch position number is the terminal location opposite the shaft flat; it is
not the same as the decimal number.
** To limit an adjustable stop switch to the decimal number shown, insert the
second pin in the hole lying between the 2 switch positions indicated.
Specifications
Optical and Mechanical
Encoders
Electrical Rating
Rated: To make and break 125 mA 30 Vdc
resistive load for 25,000 cycles of operation.
Cycle: (1 cycle = 360° rotation and return) Test
conditions are standard atmospheric pressure,
25°C and 68% relative humidity.
Contact Resistance: 20 milliohms initially,
300 milliohms maximum after life
Insulation Resistance: 50,000 megohms
initially, 10,000 megohms after life
Voltage Breakdown: 500 Vac between
mutually insulated parts
Materials and Finishes
Bases: Thermoset plastic
Detent Rotor: Nylon
Shaft, Stop Blades, Stop Arm, Thrust Washer
And Retaining Ring: Stainless steel
Detent Balls: Steel, nickel-plated
Bushing: Zinc, Tin-zinc-plated
Detent Spring: Stainless steel
Common Terminals and Rings: Brass, gold
plate .00003" minimum over silver plate .0003"
minimum
Terminals: Brass with silver contact surface,
gold-plated .00003"
Rotor Contact: Berillium copper with silver
contact surface
Shaft And Panel Seal: Silicone rubber
Mounting Hardware: One mounting nut, .089"
thick by .375" across flats, and one internal tooth
lockwasher are supplied with the switch.
Additional Characteristics
Contact Type: Wiping contacts
Shaft Flat Orientation: Switch position is
defined as that position that is opposite the shaft
flat.The location of the contacts in relation to the
shaft flat is shown on the circuit diagram.
Terminals: Only the active position terminals,
as shown in the circuit diagram are supplied
with the switch. All common terminals are
supplied.
Stop Strength: 7.5 in-lbs minimum
Rotational Torque: 8 to16 in-oz
Bushing Mounting: Required for these
switches
Maximum Mounting Torque: 15 in-lbs.
Ordering Information
Type Of
Maximum No.
Switch Of Positions
Unsealed
BCD Output
Sealed
BCD Complement
Unsealed
Sealed
Fixed Stop
7
8
9
10
11
12
513360-7
513360-8
513360-9
513360-10
513360-11
513360-12-F
513374-7
513374-8
513374-9
513374-10
513374-11
513374-12-F
513361-7
513361-8
513361-9
513361-10
513361-11
513361-12-F
513375-7
513375-8
513375-9
513375-10
513375-11
513375-12-F
Continuous Rotation
12
513360-12-C
513374-12-C
513361-12-C
513375-12-C
Adjustable Stop
12
513385
———
513384
———
The -C suffix indicates continuous rotation. The -F suffix indicates a fixed stop between positions 1 and 12.
For prices and discounts, contact a local Sales Office, an authorized local Distributor or Grayhill.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Adjustable Stop Rotary Switches
Features
• Quick Route to Rotary Switches
• For Prototypes and
Small Production Runs
Series
50/51
Series
42/44
Series
56
Series
71
BEST AVAILABILITY
The Problem
Procurement lead time on rotary switches for
prototypes and small production runs can be long.
This is often a source of headache for design
engineers and production control managers.
Grayhill makes more than 300,000 combinations
of rotary switch styles; number of decks, poles
per deck, positions per pole, military qualified
or commercial grade, etc. This wide variety
makes it impractical for either distributors or
manufacturers to stock completed switches.
Consequently, even small quantities must be
built to order.
The Solution
Grayhill Electronic Distributors can supply a wide
variety of rotary switches with Adjustable Stops.
This feature gives you a switch immediately
with exactly the electrical properties you need.
These Adjustable Stop switches have the basic
mechanical characteristics of their fixed stop
counterparts. To get the right number of positions
per pole for your application, simply adjust the
stop washers or stop pins.
By stocking a few switches, the Distributor
provides over 100,000 possible combinations of
switches. This includes the popular styles, sizes,
angles of throw, number of decks, poles per
deck, positions per pole, and types of contacts.
Availability of these switches through Distributors
speeds prototype development time. There is no
time lag in waiting for factory made samples.
The Substitution
Writing an equivalent part number is easy. To
obtain an adjustable-stop equivalent to a fixedstop rotary switch you must substitute style
letters and possibly series number. Then replace
the positions-per-pole number in the fixed-stop
number with the letters AJ. See the examples
for the scheme.
series, style and angle of throw as well as
the adjustable stop rotary switch series, style
and angle of throw. Then the letters AJ in the
positions-per-pole location, gives you the part
number of the equivalent.
Suppliers
Distributors can supply 1 and 2-deck adjustablestop switches from stock (one or two poles
per deck). They can also quickly secure other
variations from factory stock. Reduce prototype
development time. Use Grayhill Adjustable
Stop Rotary Switches for all of your prototype
requirements.
These electronic distributors also maintain a
representative stock of Grayhill products. Local
availability can often “save the day”, and simplify
your paperwork.
When adjustable equivalents apply, the rotary
switch pages will indicate the substitutions.
A chart will show the fixed stop rotary switch
Fixed Stop Rotary Switch
Adjustable Stop Equivalent
Series
Style
Angle of Throw
No. of Decks
Poles/Deck
Positions/Pole
Type of Contacts
N = Non-Shorting
S = Shorting
42A36-01-1-07N
www.grayhill.com
Series
Style
Angle of Throw
No. of Decks
Poles/Deck
Positions/Pole
Type of Contacts
N = Non-Shorting
S = Shorting
42D36-01-1-AJN
Bulletin 1221
Rev 04/14
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Special Function Rotary Switches
SERIES 09, 42, 44, 50, 51
Isolated Position
FEATURES
• Protected Switch Positions For
Safety, Calibration, or Stand-by
• Choice of Push- or Pull-To-Turn
• 1/2" Diameter, 200 mA and
1" Diameter, 1 Amp Switch
• 10,000 Cycles of Operation
DESCRIPTION
An isolated position is one which cannot be reached by the normal rotation. An additional action is
required by the operator. It could be either Push-To-Turn, or Pull-To-Turn. After the switch is rotated
to the isolated position, releasing the shaft locks the switch in that position. Push or pull again to
rotate the switch again.
Use isolated positions to protect a switch position from indiscriminate rotation. Such safety positions
might include “calibrate”, “off” and/or “stand-by”.
DIMENSIONS
Series 09
Series 42 & 44
Series 50 & 51
DIM. A + .046 (1,17)
–.020 (0,51)
DIM. A
.062 (1,57)
Rotary Switches
DIM. A
DIM. A + .046 –.020
(+ 0,05 –0,51)
SOLDER
LUGS
PC
TERMINALS
Dimension A
1 Deck
2 Decks
3 Decks
4 Decks
1.228
1.496
1.764
2.032
(31,19)
(38,0)
(44,81)
(51,61)
Dimension A
Dimension A
Solder Lug
PC Style
.893 ± .025 (22,68 ± 0,64)
.897 ± .025 (22,78 ± 0,64)
1 Deck
2 Decks
3 Decks
4 Decks
1.371
1.717
2.063
2.409
(34,82)
(43,61)
(52,40)
(61,19)
Grayhill part number and date code marked on label.
Customer number marked on request.
EXTERNAL DIFFERENCES
SPECIFICATIONS
The isolated position mechanism increases the
depth of the Series 50 and 51 by 0.217" (5,51
mm). All other dimensions remain unchanged.
In Series 9, 42 and 44, it has the appearance of
an additional deck section without terminals,
located directly behind the detent system.
Electrical Ratings
Materials and Finishes
The switching elements, and therefore ratings,
are the same in an isolated position switch as in
a conventional rotary switch. Mechanical life is
also the same.
Materials and finishes for the isolation
mechanism are listed here.
Series 50 and 51
Housing: Zinc casting, tin/zinc-plated
Shaft: 303 stainless steel
Stop Pin and Stop Post: 303 stainless steel
Spring: Tinned music wire
Series 09
Housing: Phenolic for style A; Diallyl, for M
Shaft: 303 stainless steel, electro-polished
Stop Pin and Stop Post: 303 stainless steel
Spring: Tinned music wire
Series 42 and 44
Housing: Diallyl per MIL-M-14
Shaft: 303 stainless steel
Lock Plate: 302 stainless steel
Lock Arm: 316 stainless steel
Lock Post: Brass, tin/zinc-plated
Compression Spring: Tinned music wire
Additional Characteristics
Shaft Movement or Vertical Travel:
Series 09
.062 ± .020 (1,57 ± 0,51)
Series 42 & 44
.070 ± .020 (1,78 ± 0,51)
Series 50 & 51
.080 ± .020 (2,03 ± 0,51)
Push or Pull Force Required:
Series 09
1.75 ± .5 lbs
Series 42 & 44
2 ± .5 lbs
Series 50 & 51
2 ± .5 lbs
Stops: Single pole per deck switches with the
maximum number of positions are supplied with
stops only on request: 12 positions in 30° throw,
10 in 36°, and 8 in 45°.
Stop Strength: Approximately 7.5 pound-inches
for the isolated position stop.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Special Function Rotary Switches
CHOICES AND LIMITATIONS
Standard
Style
Military
Style**
Style
Description
Angle Of
Throw
09A
09M
Solder Lug
42A
42S
—
—
42M
—
42H
42HS
Solder Lug
Sealed
125° Temperature Rating
125° Temp Rating, Sealed
Poles Per
Deck
Positions
Per Pole
01 to 04
01 to 04
01 to 04
01 to 04
01 to 04
01 to 03
1
2
3
4
5
6
02 to 12
02 to 06
02 to 04
02 or 03
02
02
N or S
N or S
N or S
N or S
N or S
N or S
01 to 04
01 to 04
1
2
02 to 10
02 to 05
N or S
N or S
01 to 04
01 to 04
01 to 04
01 to 04
01 to 04
01 to 04
1
2
3
4
5
6
02 to 12
02 to 06
02 to 04
02 or 03
02
02
N or S
N or S
N or S
N or S
N or S
N or S
45°
01 to 04
01 to 03
01 or 02
01 or 02
1
2
3
4
02 to 08
02 to 04
02
02
N or S
N or S
N or S
N
36°
01
1
2
02 to 10
02 to 05
N or S
N or S
30°
01
1
2
3
4
02 to 12
02 to 06
02 or 03
02 or 03
N or S
N or S
N or S
N or S
30°
36°
30°
44A
44S
—
—
44M
—
44H
44HS
Solder Lug
Sealed
125° Temperature Rating
125° Temp Rating, Sealed
-----
50C
50CP
50M*
50MP*
Solder Lug
PC Mount
Solder Lug, Sealed
Sealed, PC
-----
51C
51CP
51M*
51MP*
Solder Lug
PC Mount
Solder Lug, Sealed
PC Mount, Sealed
Shorting Or
Non-Shorting
*(Pull-to-Turn only) **For specifics on military qualified products, see Standard Switch Pages.
CONVENTIONAL NUMBERS
Start by creating a conventional switch number
in the manner which follows:
Series & Style
Angle of Throw
Number of Decks
09A30-01-1-12N
Type of Contacts
Shorting = S
Non-Shorting = N
Positions Per Pole
Poles Per Deck
Note: No stop arrangement suffix is needed.
See Describing Stops.
DESCRIBING POSITIONS
The Grayhill system for isolating positions lets
you choose the positions to be isolated. Grayhill
inserts isolation posts next to the positions to be
isolated. Consider a continuous rotation switch
of the Series 09A with a 30° angle of throw. The
terminals are listed here from 1 through 12 with
a space between each to indicate where isolation
posts might be inserted.
12 1 2 3 4 5 6 7 8 9 10 11 12
Let's isolate position 1 and position 2 from all
other positions and from each other. We indicate
isolation posts as shown here:
12P1P2P3 4 5 6 7 8 9 10 11 12
To isolate just position 1, describe like this:
12P1P2 3 4 5 6 7 8 9 10 11 12
To isolate positions 1 and 2 from all other
positions, but not from each other, do this:
12P1 2P3 4 5 6 7 8 9 10 11 12
ORDERING INFORMATION
Indicate this as a SPECIAL switch to ensure
that no error is made when the order is entered.
Sample part number:
SPECIAL
09A30-04-1-12N
PULL 12P1P2P3 4 5 6 7 8 9 10 11 12
DESCRIBING STOPS
When a 1-pole switch has less than the maximum
number of positions, consider also the stop
system. Following is the arrangement for a 6
position switch with the position 1 isolated.
STOP 1P2 3 4 5 6 STOP
The word “STOP” indicates the conventional
switch stops, which limit rotation to positions 1
through 6. To isolate position 1 we insert only
one isolation post–between terminals 1 and 2.
The stop system already prevents rotation
beyond terminal 1.
In multi-pole switches, the stop system and
isolation system described for the first pole,
automatically affects the other poles. In the
example above, isolating position #1 on the first
pole isolates the first position (terminal #7) of
the second pole. See Standard Switch Pages
for a 2 pole circuit diagram for a 30° throw
switch.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
This sample part number orders a Series 9
standard style, four deck, one pole per deck,
twelve positions per pole rotary switch with nonshorting contacts and isolation posts between
positions 12 and 1, between 1 and 2, and
between 2 and 3.
This lengthy order number is required to prevent
any possible confusion in ordering the switch.
When we receive your order, we will assign a
special “short form” part number to facilitate
future identification of this special switch. This
number is sequentially assigned as the need
arises, and is non-descriptive. A typical “short
form” special part number might be 09YY12345.
Contact Grayhill for price.
Not available through Distributors.
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
No. Of
Decks
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Special Function Rotary Switches
SERIES 08,09,42,44,50
Spring Return
FEATURES
• Hold-To-Test, Hold-To-Calibrate,
And Other Momentary Applications
• Choice of Configurations, Ratings,
Styles and Circuitry
• 10,000 Cycles of Operation
DESCRIPTION
A spring return rotary switch has 1 or more momentary positions. Maintaining contact at momentary
positions requires rotational force. Releasing the force allows the mechanism to return the contact
to a normal, or detent, position.
DIMENSIONS
Series 08 & 09
Series 50
Equivalent to Series 50 Standard Switches
.500 ± .015
(12,7 ± 0,38)
DIA.
DIM. A + .046 (1,17)
–.020 (0,51)
DIM. B REF.
STUD PROJECTION
.320 ± .015 (8,13 ± 0,38)
CIRCLE OF CENTERS
COMMON
No. of
Decks
.960
1.228
1.496
1.764
2.032
2.550
(24,38)
(31,19)
(38,0)
(44,81)
(51,61)
(64,77)
Dim
B
.062
.062
.062
.062
.062
.312
Series 42 & 44
DIM. A + .046 (1,17)
–.020 (0,51)
(1,57)
(1,57)
(1,57)
(1,57)
(1,57)
(7,92)
No. of
Decks
1
2
3
For all other dimensions and
specifications, see Standard
Switch pages.
Dim.
A
1.025 (26,04)
1.371 (34,82)
1.717 (43,61)
For all other dimensions and
specifications, see Standard
Switch pages.
CONFIGURATIONS
SELECTING A SWITCH
OPTIONS
This configuration indicates a counterclockwise
force is required to hold the switch at position
#1. “M” indicates a momentary position
counterclockwise of “D” and "D", detented ones.
Positions
1
2
3
M D
D
Releasing this force breaks contact with position
#1 and returns the switch to #2. Normal rotary
switch detent action occurs when the switch is
rotated between position #2 and #3.
1. Select a Configuration: The total number of
positions always includes the 2 basic positions.
A (4) position switch of DDDDM configuration
would have 3 detent positions counterclockwise
of the momentary position.
Watertight panel seal; Multi-pole switches that
exceed the limits noted in the Selector Chart;
Series 50 MD or DM configurations in Military
styles; Series 08, 09, & 44 in MMMDM MM, and
in MMDD MM, and in MMMMMD.
Not available through Distributors
All of the configurations (except MDM) list a
basic 2 position arrangement which is shown in
italics. Example: MDDDDD or DDDDDM. Several
positions can be added during the switch
construction at the factory; but, any configuration
must always contain the 2 basic positions.
2. Select Series, Angle of Throw, and Style:
See the Choices Chart. The basic switch
description, series, and throw are as follows:
1
/2", 1/4 Amp, multi-deck
08 = 36° 09 = 30°
1", 1 Amp, multi-deck
42 = 36° 44 = 30°
1
/2", 200 mA, single deck 50 = 36°
Electrical ratings are the same as those of the
conventional switches with the exception of life.
Life is limited to 10,000 cycles of operation
(25,000 cycles for Series 50) due to the spring
arrangement. Dimensions are the same as for
conventional types except for the shaft flat
orientation of the 3, 4, 5, and 6 pole, Series 09
and 44 in the DDDDDM configuration (see
chart).
3. Select Poles & Positions Per Pole: If you
do not find the poles and positions per pole you
need in one series, try another or contact the
factory. If the behind panel length is a problem,
select a multi-pole type instead of a single deck.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
ORDERING INFORMATION
Create the part number using this example.
Stem number from chart
(4 or 5 digits)
Number of Decks
Number of Poles/Deck
093103-2-045
Type of Contacts:
S=Shorting
N=Non-Shorting
Number of Positions/Pole
Exception: Numbers beginning with 5 are
already complete part numbers.
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
1
2
3
4
5
6
Dim
A
For all other dimensions and
specifications, see Standard
Switch pages.
36°
± 3°
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Special Function Rotary Switches
CHOICES AND LIMITATIONS
Configuration
Conventional
Switch
08A36
Description
Of
Style
Standard
Spring Return
Stem Number
(See Ordering Info.)
08317
Poles
Per
Deck
Positions Per
Pole & Contact
Type
Location Of
Unique Position,
Detent or Momentary
Term.
Opp.
Flat**
1 to 6
1 to 3
1
2
02 to 05 (N or S)
02 to 05 (N or S)
M5
M 5, 10
5
5
1 to 6
1 to 3
1 or 2
1
1
1
2
3
4
5 or 6
02 to 06 (N or S)
02 to 06 (N or S)
02 to 04 (N or S)
02 or 03 (N or S)
02 (N or S)
M6
M 6, 12
M 4, 8, 12
M 3, 6, 9, 12
M 2, 4, 6, 8, 10, 12
6
6
4
3
2
09A30
Standard
09310
42A36
Standard
42349
1 to 3
1
1
2
02 to 05 (N or S)
02 to 05 (N or S)
M5
M 5, 10
5
5
42M36
Military
42352
1 to 3
1
1
2
02 to 05 (N or S)
02 to 05 (N or S)
M5
M 5, 10
5
5
44A30
Standard
44346
1 to 3
1
1
2
02 to 06 (N or S)
02 to 06 (N or S)
M6
M 6, 12
6
6
44M30
Military
44350
1 to 3
1
1
2
02 to 06 (N or S)
02 to 06 (N or S)
M6
M 6, 12
6
6
08A36
Standard
08319
1 to 6
1 to 3
1
2
02 to 05 (N or S)
02 to 05 (N or S)
M1
M 1, 6
1
1
1
2
3
4
5 or 6
02 to 06 (N or S)
02 to 06 (N or S)
02 to 04 (N or S)
02 or 03 (N or S
02 (N or S)
M1
M 1, 7
M 1, 5, 9
M 1, 4, 7, 10
M 1, 3, 5, 7, 9, 11
1
1
1
1
1
DDDDDM
09A30
Standard
09312
1 to 6
1 to 3
1 or 2
1
1
09M30
Military
09356
1 to 3
1
1
1
2
3
02 to 06 (N or S)
02 to 06 (N or S)
02 to 04 (N or S)
M1
M 1, 7
M 1, 5, 9
1
1
1
42A36
Standard
42350
1 to 3
1
1
2
02 to 05 (N or S)
02 to 05 (N or S)
M1
M 1, 6
1
1
42M36
Military
42353
1 to 3
1
1
2
02 to 05 (N or S)
02 to 05 (N or S)
M1
M 1, 6
1
1
44A30
Standard
44312
1 to 3
1
1
2
02 to 06 (N or S)
02 to 06 (N or S)
M1
M 1, 7
1
1
44M30
Military
44351
1 to 3
1
1
2
02 to 06 (N or S)
02 to 06 (N or S)
M1
M 1, 7
1
1
50A36
Std., Solder Lug
503265-1-03N*
1
1
03N
D2
2
50P36
Std., PC Mount
503267-1-03N*
1
1
03N
D2
2
8A36
Standard
08316
1 to 6
1 to 3
1
2
03 (N or S)
03 (N or S)
D2
D 2, 7
2
2
9A30
Standard
09311
1 to 6
1 to 3
1 or 2
1
1
2
3
4
03 (N or S)
03 (N or S)
03 (N or S)
03 (N or S)
D2
D 2, 8
D 2, 6, 10
D 2, 5, 8, 11
2
2
2
2
42A36
Standard
42348
1 to 3
1
1
2
03 (N or S)
03 (N or S)
D2
D 2, 7
2
2
42M36
Military
42351
1 to 3
1
1
2
03 (N or S)
03 (N or S)
D2
D 2, 7
2
2
44A30
Standard
44345
1 to 3
1
1
2
03 (N or S)
03 (N or S)
D2
D 2, 8
2
2
44M30
Military
44349
1 to 3
1
1
2
03 (N or S)
03 (N or S)
D2
D 2, 8
2
2
MDDDDD
Rotary Switches
MDM
No.
Of
Decks
*This is a complete (not stem) part number.
**Terminal opposite shaft flat when switch
is in its unique (detent or momentary)
position.
Available from your local Grayhill Distributor
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
For prices and discounts, contact a local Sales
Office, an authorized local Distributor, or Grayhill.
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Rotary Switch Engineering Information
Catalog Ratings
Are catalog ratings misleading? In most cases,
yes. Load and life ratings shown in most catalogs
are usually invalid for most applications. This
results from the complex interplay of such factors
as environment, duty cycle, life limiting or failure
criteria, actual load, etc. Circuit designers should
be aware of these factors, and the effect they have
on the useful life of the switch in their applications.
The problem of switch rating arises from the wide
variety of requirements placed on the switch. This
includes various applications, and the sensitivity
of the switch to a change in requirements. If we
attempted to establish life ratings for all possible
applications, we would have an almost infinite
variety of ratings.
To simplify the problem, switch manufacturers,
switch users, and the military, have established
certain references for ratings. These include
loads, life requirements, environments, duty
cycles, and failure criteria. These references
are arbitrarily established. But, they allow you to
compare different switch designs. They do not,
however, match the actual requirements for most
applications.
The curves shown here are an example of some
of the life load curves. These curves are life load
characteristics of the Grayhill 42M and 44M
switches. Note that the curves consider only two
voltage sources and two types of loads. These
voltages and loads are, however, considered as
standards for testing procedures by the industry.
Curve data is based on tests conducted at
sea level, 25°C and 68% relative humidity.
Cycle = 360° rotation and return. Cycling rate
is 10 cycles per minute. Switch rating is for
non-shorting contacts.
CURRENT (AMPS)
7
6
5
VOLTAGE 115 VAC
RESISTIVE
4
3
2
1
0
0
10
25
50
CYCLES x 1,000
CURRENT (AMPS)
1.7
1.5
VOLTAGE 30 VDC
RESISTIVE
1.2
1.0
.75
INDUCTIVE
(2.8 HENRIES)
.50
.20
0
0
10
25
50
CYCLES x 1,000
www.grayhill.com
These curves allow you to predict the expected life
of the switch once you know the voltage, current
and type of load. Also note that each cycle is
approximately a 360° rotation and a return. For a
ten position switch this would be a rotation from
position 1 to position 10 and back to 1. This cycle
runs approximately ten times a minute. Thus testing
causes more electrical and mechanical wear than
what the switch incurs in actual use.
Summary
The life and load ratings in this and other catalogs
are probably not totally valid for your application.
The bright side of the picture is that in most
applications the switch will perform better than its
ratings. This is because the standard industry test
conditions are more stringent than those found in
most applications.
This difference can be very dramatic. For example,
Grayhill’s 42A and 44A Series Rotary Switches, are
rated at 1 ampere (115 Vac resistive). However,
they will operate at 5 amperes in many applications.
To see how some major factors influence switch
performance, read on.
USEFUL LIFE CRITERIA
The “useful” life of a switch in your application
depends on what you demand of it. This includes
parameters such as contact resistance, insulation
resistance, torque, detent feel, dielectric strength,
and many other factors. For example, a contact
resistance of 50 milliohms may be totally unusable
in certain applications such as a range switch in a
micro-ohm meter. In other applications a contact
resistance of 5 ohms may be perfectly satisfactory.
In establishing “useful” life for a switch in your
application, you must first determine “failure
criteria,” or “end of life” parameters. At what level
of contact resistance, dielectric strength, etc., is the
switch no longer acceptable for your application?
Most switches are acceptable on all parameters
when new. There is a gradual deterioration in
performance with life. The rate of deterioration
varies greatly with basic switch design. Often,
circuit designers select a switch on the basis of
its performance when new. This is a mistake.
The performance of the switch after several
years of equipment use is more significant. To
estimate this, first determine the life limiting or
failure criteria for your application. In most uses,
important life-limiting (failure) criteria include the
following parameters:
Contact Resistance
Insulation Resistance
Dielectric Strength
Actuating Force
Contact Resistance
This is the resistance of a pair of closed contacts.
This resistance effectively appears in series with
the load. Typical values are in the range of a few
milliohms for new switches. These values usually
increase during life. The rate of increase is greatly
affected by the voltage, current, power factor,
frequency, and environment of the load being
switched. Typical industry standard “end of life”
criteria for this parameter are:
MIL-DTL-3786:
MIL-S-6807:
MIL-S-8805:
MIL-S-83504:
20 milliohms
(Rotary Switches)
20 milliohms
(Snap Pushbuttons)
40 milliohms
(Pushbuttons)
100 milliohms
(DIP Switches)
Contact resistance can be measured by a number
of different methods. All of them are valid depending
upon the switch application and the circuit.
Grayhill uses the method in applicable military
specifications. This method specifies an open
circuit test voltage and a test current. The voltage
drop across the closed contacts is measured. The
contact resistance is determined by Ohm’s Law
from the test current and the measure voltage
drop. MIL-DTL-3786, MIL-S-6807 and MIL-S-8805
require a maximum open circuit test voltage of 2
Vdc; they require a test current of 100 milliamperes.
MIL-S-83504 requires a maximum test voltage of
50 millivolts and a test current of 10 milliamperes.
When a switch is rated to make and break 5 or more
amperes, there is a difference. Contact resistance
is determined by measuring the voltage drop while
the switch is carrying the maximum rated current.
The voltage drop that occurs across the contacts
determines, in part, the contact temperature. If
the temperature rise of the contacts is sufficient,
it affects contact material. A chemical reaction
will take place that can cause an insulating film
to appear on the contacts. This film is present
between the contacts during the next switching
operation. This film formation can cause failure
due to increasing contact resistance. For switching
of very low voltages and currents, this resistance
may be the failure criteria.
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Insulation Resistance
This is the resistance between two normally
insulated metal parts, such as a pair of terminals.
It is measured at a specific high DC potential,
usually 100 Vdc or 500 Vdc. Typical values for
new switches are in the range of thousands of
megohms. These values usually decrease during
switch life. This is a result of build-up of surface
contaminants. Typical industry standard “end of
life” criteria for the parameter are:
MIL-DTL-3786:
MIL-S-6807:
MIL-S-8805:
MIL-S-83504:
1000 megohms
(for plastic insulation)
Not specified
2000 megohms
1000 megohms
Another special test condition is commonly
specified. It measures insulation resistance for
switches in a high humidity atmosphere (90%-98%
R.H.). In this condition, condensation of moisture
commonly occurs on the surface of the insulating
material. Some types of insulation will absorb
varying amounts of moisture. This will normally
lower the insulation resistance. Typical industry
values for this condition are:
MIL-DTL-3786:
MIL-S-6807:
MIL-S-8805:
MIL-S-83504:
10 megohms
(for plastic insulation)
3 megohms after
drying
10 megohms
(for plastic material)
10 megohms
Dielectric Strength
This is the ability of the insulation to withstand
high voltage without breaking down. Typical
values for new switches in this test are in excess
of 1500 Vac RMS. During switch life, contaminants
and wear products deposit on the surface of the
insulation. This tends to reduce the dielectric
withstanding voltage. In testing for this condition,
a voltage considerably above rated voltage is
applied. Then, the leakage current is measured
at the end of life. Typical industry standard test
voltages and maximum allowable leakage currents
are as follows:
MIL-DTL-3786:
1000 Vac and 1 mA
maximum leakage
MIL-S-6807:
600 Vac RMS after life
10 microamperes
maximum leakage
MIL-S-8805:
1000 or 1000 plus
twice working voltage
(AC) RMS and 1mA
maximum leakage
MIL-S-83504:
500 Vac and 1 mA
maximum leakage
UL Standard:
900 Vac without
breakdown (UL
Standard (dependent
on test)
Voltage breakdown is another method for
www.grayhill.com
describing the ability of the insulating material
to withstand a high voltage. Voltage breakdown
describes the point at which an arc is struck and
maintained across the insulating surface with the
voltage applied between the conducting members.
ADDITIONAL LIFE FACTORS
Effect of Loads
On any switch, an arc is drawn while breaking a
circuit. This causes electrical erosion of the contacts.
This erosion normally increases contact resistance
and generates wear products. These wear products
contaminate insulating surfaces. This reduces
dielectric strength and insulation resistance.
The amount of this erosion is a function of current,
voltage, power factor, frequency and speed of
operation. The higher the current is, the hotter
the arc and the greater the erosion. The higher
the voltage is, the longer the arc duration and the
greater the erosion.
Inductance acts as an energy storage device. This
returns its energy to the circuit when the circuit
is broken. The amount of erosion in an inductive
circuit is proportionate to the amount of inductance.
Industry standard test inductance as described in
MIL-I-81023 is 140 millihenries. Other test loads
include 250 millihenries and 2.8 henries.
Effect of Ambient Temperature
Temperature extremes may affect switch
performance and life. Very high temperatures
may reduce the viscosity of lubricants. This allows
them to flow out of bearing areas. This can hasten
mechanical wear of shafts, detents, plungers, and
cause early mechanical failure. Contact lubricants
are sometimes used. Too little lubrication can
result in a high rate of mechanical wear. Too much
lubrication flowing from other bearing areas can
adversely affect dielectric strength and insulation
resistance.
Through careful design and selection of lubricants
most manufacturers attempt to minimize these
affects. Nevertheless, continual operation in high
ambient temperatures will shorten the life of a
switch regardless of design.
Extremely low ambient temperatures may also
create problems. Low temperatures may cause an
increase in the viscosity of the contact lubricant.
Higher viscosity can delay or prevent the closing
of contacts, causing high operating contact
resistance. Under certain atmospheric conditions,
ice may form on the contact surfaces. This also
causes high and erratic contact resistance.
Frequency can also affect erosion. The arcing
ends when the voltage passes through zero. To
a certain extent, the following is true. The higher
the frequency, the sooner arcing ends, the lower
the erosion.
Neither of these conditions may materially
reduce the life of the switch. However, it may
cause unsatisfactory operation. If the voltage of
the circuit is high enough, it can break down the
insulating layer. Some current will flow through the
high resistance contacts. A local heating action is
created, which tends to correct the condition in a
short period of time.
The speed of operation affects the duration of the
arc. Fast operation can extinguish the arc sooner.
This reduces the erosion, unless the air within the
switch is completely ionized.
Switches with high contact pressures may minimize
the low ambient temperature effect. This is
particularly true if the application calls for switching
signal level voltages and currents.
Actuating Force
Effects of Altitude
Rotational torque is the actuating force required to
turn a rotary switch through the various positions.
The actual torque or force required depends on
the design of the switch. It varies widely from one
design to another. See appropriate MIL Specs or
manufacturers literature for typical industry values
for specific designs.
When torque or force values are specified, it
is customary to give a minimum and maximum
value. During life, two offsetting factors may occur
to change the initial value. Relaxation of spring
members will tend to lower torque or force values.
Wear or “galling” of mating surfaces, however,
may tend to increase these values. Typical end
of life specifications may require the switch to fall
within the original range. Or, they may specify a
maximum percentage change from original value.
For example, “the rotational torque shall not change
more than 50% from its initial value.
In high altitudes, barometric pressure is lower. Low
pressure reduces the dielectric strength of the air.
The arc strikes at a lower voltage and remains
longer. This increases contact erosion. Switches
for use in high altitudes will therefore require derating in terms of loads and/or life.
Effects of Duty Cycle
Mechanical life testers cause accelerated life
testing. Testers operate switches at a rate of
approximately 10 cycles per minute. This rate is
greatly in excess of normal manual operation in
equipment. It constitutes a severe test of the switch.
Lubricants do not have an opportunity to redistribute
themselves over the bearing surfaces at this duty
cycle. The contact heating caused by arcing does
not have a chance to dissipate.
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Thus, the switch runs “hot”, increased mechanical
wear and contact erosion result. Your application
probably requires manual operation of the switch
with an attendant low duty cycle. If so, you can
usually expect much longer switch life than is
shown by the accelerated life laboratory life tests.
Conclusion
Remember, load and life ratings are based
on manufacturers’ selected references. They
include accelerated life tests and an arbitrary
set of application parameters and failure criteria.
These parameters and criteria may not always
fit your application.
Then how do you know if a switch will give reliable
performance in your application?
How do you know if it will last the life of your
equipment?
Ask the switch manufacturer. Grayhill, and most
other reputable manufacturers have compiled
vast quantities of test data. We are in a position
to give a good estimate of a switch’s performance
in many nonstandard applications. You should
provide the following data:
Expected Life:
Load:
Operation:
Application:
Environment:
Failure Criteria:
in number of cycles
voltage, current, power
factor, and frequency
manual or mechanical, duty
cycle
type of equipment
altitude,
ambient
temperature range
relative humidity, corrosive
atmosphere, shock,
vibration, etc.
end of life contact
resistance, dielectric
strength, insulation
resistance, etc.
With this information, we can usually estimate
if a given switch is suitable for your application.
www.grayhill.com
Soldering
What causes failure in a new switch after it
has been installed? The principle failure is high
contact resistance caused by solder flux on the
contact surfaces. To avoid this, be sure to follow
good soldering practices. Use the proper solder
with the proper flux core, maintain the proper
soldering temperature, use the proper soldering
iron tip for the work, and never use liquid flux
when soldering a switch.
initially and 10.0 ohm maximum dc resistance
following environmental and mechanical tests.
Many equipment manufacturers feel they are
satisfying their needs with a measurement of .025
to 10 ohms for the expected life of the switch.
Under most circumstances, standard non-sealed
switches pass the larger value easily. The lower
value (.025 ohms) requires special attention and
parts for compliance over the life of the switch.
Do not use solvent baths or washes with any
unsealed electromechanical parts. Switches,
unless they have been especially protected suffer
badly. Solvents readily dissolve fluxes and carry
them into the contact area of switches. A thin, hard
flux coats the contact surface after the solvent
evaporates. Additionally, solvents may dissolve
and wash away lubricants in switches. Lubricant
loss may prevent proper mechanical action.
Switch Selection
Exercise similar precautions when you mount a
switch to a printed circuit board. Maintain proper
solder temperatures and follow proper cleaning
techniques. Avoid subjecting these switches to
lengthy solder baths. The excessive heat can
deform the plastics.
RFI/EMI Shielding
Some applications require shielding against Radio
Frequency Interference and/or Electro-Magnetic
Interference. Experts feel that the most effective
way to achieve shielding is to provide a conductive
bridge across the component mounting hole.
They also generally agree that there is no good
method for testing shielding. So, the equipment
manufacturers themselves must identify and solve
specific problems. Component manufacturers
can generally assist in the solution of shielding
problems.
RFI/EMI testing is incorporated into MILDTL-3786 for rotary switches. Requirements
are 1.0 ohm maximum dc resistance between
the mounting bushing and operating shaft
Whenever possible, use standard switches and
contact configurations. Standards provide the
greatest economy and the best delivery. When
you need a deviation, it pays to consult with your
suppliers as soon as possible. At the early stages
of the design, there are many low cost options
for achieving the results. At the late stages of
design, some of the options may no longer be
open. For example, size may be restricted. This
might result in a more costly redesign.
Typical standard rotary options are as follows:
coded contacts, homing rotor effect, progressively
shorting contacts, PC mountable terminals, rotary
switch spring return positions, and push-to-turn
or pull-to-turn mechanisms.
Limited panel space may be solved by a concentric
shaft rotary switch. It is two rotary switches,
located one behind the other. There are other
concentric shaft possibilities. A rotary switch can
be combined with another component. These
include a potentiometer, a pushbutton switch, and
a mechanical element. The most cost effective
design may be one of these concentric options.
But, selection must be made at the outset of
equipment design.
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
1. SELECT A FACTOR
FACTOR: Current Life Rating
All switches are rated to make and break at least 100 milliamperes for 10,000 cycles of operation. Rating becomes a matter of interpretation. Carefully
review the Engineering Information on the previous pages. Ratings which assure a different life are possible; contact Grayhill.
25,000 Cycles At Load (Amps)
10,000 Cycles At Load (Amps)
6,000 Cycles At Load (Amps, UL)
19
24
—
—
15
1
—
—
Single Deck Switch Series Multi-Deck Switch Series
50/51 56
75
77
5000 08/09 42/44 43/54
53,57,59
71
.050
.200
—
—
.200
—
—
.100
—
.050
—
—
1
—
—
.250
.500
—
1,3,5*
1,3,5*
—
1,3,5*
1,3,5*
—
—
.250
.150, .250* —
—
—
* Varies with angle of throw and style.
FACTOR: Size
Maximum Dimension
In Inches (& Millimeters)
19
24
Single Deck Switch Series
50 51
56
75
77
5000
08
09
Multi-Deck Switch Series
42
44
53
57
59
71
Diameter, Behind Panel
2.280 1.015 .500 .561 .500 .298
1.015 .687 .750 1.015 1.170 1.350 1.190 1.190 .750
Length Behind Panel, 1 Deck .950 .580 .698 .698 .355 .500
.470 .960 .960 1.025 1.025 .916 .916 .916 .760
Behind Panel, Add'l Deck
— — — — — — — — .268 .268 .346 .346 .329 .326 .326 .218
Diameter, Behind Panel
(57,9) (25,8) (12,7) (14,2) (12,7) (7,6)
Length Behind Panel, 1 Deck (24,1) (14,7) (17,7) (17,7) (9,0) (12,7)
Behind Panel, Add'l Deck
— — — — — —
FACTOR: Circuitry
Max. Positions
1 Deck (1Pole)*
() (25,8) (17,4) (19,0) (25,8) (29,7) (34,3) (30,2) (30,2) (19,0)
() (11,9) (24,4) (24,4) (26,0) (26,0) (23,3) (23,3) (23,3) (19,3)
— — (6,8) (6,8) (8,8) (8,8) (8,4) (8,3) (8,3) (5,5)
* If multi-deck switch is needed, contact Grayhill.
Angle Of
Throw
Maximum
Decks**
Maximum Poles
Per Deck***
Shorting Or
Non-Shorting
15°
18°
22°30'
22°30'
12
12
12
1
12
10
8
2
N or S
N or S
N or S
N or S
Solder
Solder
Solder
Both
53
59
57
51
12
12
12
12
12
11
30°
30°
30°
30°
30°
30°
12
12
12
1
1
1
6
6
6
4
4
1
N or S
N or S
N or S
N or S
N or S
N
Both
Both
Solder
Both
Both
****
71
9
44
51
56
19
10
10
10
10
10
10
10
10
36°
36°
36°
36°
36°
36°
36°
36°
12
12
12
1
1
1
1
1
2
2
2
2
2
2
1
1
N or S
N or S
N or S
N
N or S
N or S
N or S
N or S
Both
Both
Both
PC
Both
Both
Both
Solder
8
71
42
75/77
50
56
24
5000
8
8
8
6
6
6
4
4
4
45°
45°
45°
60°
60°
60°
90°
90°
90°
12
12
1
6
12
1
12
6
1
4
4
2
3
3
2
2
2
2
N or S
N or S
N
N
N
N
N
N
N
Both
Solder
Both
Both
Solder
Both
Solder
Both
Both
9
44
50
9
44
50
44
9
50
24
20
16
16
* Maximum positions per pole depends
on number of poles per deck.
www.grayhill.com
** Based on 1 pole per deck. Number of decks
is also limited by the total number of poles.
Solder Lug
Or PC
Series
Number
*** Limited by total number of poles per switch.
****Choice of Faston or Solder Lug terminals.
Bulletin 1220
Rev 04/14
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Rotary Switch Standard Options
• Custom Switches With No
Tooling Required
• Easily Ordered Specials
1. Dummy Terminal
Used as tie point, it is not an active switch
position. Can be located at any specified position outside of active switch terminals. Priced
as active position. Example, a three position
switch with 2 dummy terminals would be
priced as a five position switch.
.072 +.000 –.002
(1,83 –0,05)
.034 ± .003
(0,86 ± 0,07)
.045
.047 (1,19)
(1,14)
.096 ± .001
(2,44 ± 0,03)
2. Enlarged Wire Holes
.032 ± .001
(0,81 ± 0,03)
R (2)
5. Notched Terminals
Used in place of the conventional solder lug
terminals.
6. External Shorting Links
.068 ± .005
(1,73 ± 0,13)
.045
(1,14)
.062 ± .003
(1,57 ± 0,08)
DIAMETER
Series 08A, 09A, 42H, 42M, 44H, and 44M:
Lug terminals for several wires; standard in Series
08M, 09M, 53, 57, and 59 switches.
3. High Density Wiring Terminal
.096 ± .001
(2,44 ± 0,03)
.0635 + .002 –.001
(1,61 + 0,05 – 0,02)
DIAMETER
The gold-plated terminal features a slot to accept
wires in addition to the conventional wire hole.
4. Taper Tab Terminals
External shorting links, as shown in the drawing,
can be used in place of conventional solder
lug terminals in the Series 5000, 24, 42 or 43
rotary switches. Shorted terminals can also be
accomplished internally in the Series 71 rotary
switches. Solder lug terminals can be intermixed
on the same deck.
7. Non-Standard, Non-Turn
Devices
Switches without tabs
Series 08, 09, 42 and 44: There is no additional
charge for a front support plate without a nonturn tab.
.095 (2,41)
.280 (7,11)
45°
.079 (2,01)
Used in place of conventional solder lug terminals.
Taper tab terminals are gold plated.
Switch
Series#
1
Options For Styles A and S
2
3 4 5 6 7
Non-turn tab of non-standard projection
Series 08:
All tabs located at .260 inch radius from centerline of switch. The following projections
(inches) are available: .121; .094; .045; .032
Series 44:
From Centerline
Projection
.375" (9,53 mm) .062" (1,57 mm)
.531" (13,49 mm) .121" or .049"
(3,07 or 1,24 mm)
8. RFI Grounding
A silver-plated shaft and wave washer improve
DC grounding of shaft to mounting bushing, thus
minimizing possible radio frequency interference. Example: static and dynamic DC resistance after 25,000 cycle life test is maximum
100 milliohms. For concentric shaft switches,
discuss grounding with factory. Special handling
charges apply to small lots.
9. Electrostatic, Electromagnetic
Shielding
A metallic shield can be added between decks.
Grounding of the shield provides additional RFV
/EMI protection, Size and shape of the shield
depends on the equipment configuration and the
amount of protection required Price is dependant onthe number and type of shields required.
10. Unidirectional Rotation
The detenting system permits rotation in only one
direction. Usable only with continuous rotation
switches. Specify direction of rotation. Applicable
to 30° and 36° throw switches only.
8
9
Options For All Styles
10 11 12 13 14 15 16
08 x x x
x x x
09 x x x
x x x
24 x x x x x x
42 x x* x x x x x x x x x x
43 x x x x x x* x x x
44 x x* x x x x x x x x x
50/51 x x
56 x x
53/57/59 x
54 x x x x x* x x x x x
71 x*
x x
5000 x x x x x x
* See description below for limitations.
www.grayhill.com
Patent Pending
©2013
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
11. Intermixing of Shorting and NonShorting Contacts
In some switches, non-shorting and shorting
contacts can be intermixed between decks. A
2-deck switch, for example could have shorting
contacts on deck 1 and non-shorting contacts
on deck 2. In a few switches, non-shorting
and shorting contacts can also be intermixed
between poles. A 2-pole per deck switch, for
example, could have non-shorting on pole #1,
and shorting on pole #2.
Series 08 and 09:
An 09M30 or 08M36 rotary switch can have
shorting and non-shorting contacts intermixed
between decks. Shorting and non-shorting
contacts can be intermixed between poles as
well as decks in styles A, S, P, and SP.
Example: an 08P36, 1-pole, 10 position switch
with terminals on one side of the switch would
be priced as a 2 deck, five position, one pole
per deck switch.
13. Homing Rotor (Bridging and
Shorting Deck) and Progressively
Shorting Deck
A homing rotor (bridging and shorting) switch
deck connects all terminals to the common except
the terminal in the selected switch position. For
example, in position 1, terminals 2 thru 12 are
CIRCUIT
DIAGRAM
Series 50, 51, and 56:
Non-shorting and shorting contacts can be
intermixed between poles.
Priced the same as standard switches. The
type of contacts on each pole must be precisely
indicated.
12. PC Mount Switches With
Terminals From One Side
of Switch
Series 71 PC mount switch has all terminals
on one side.
Series 08P, 09P, and 42P with non-shorting
contacts are also available with terminals limited
to one side. Contact Grayhill for a special part
number. This is accomplished by using 2 decks
per pole and placing the rotating contacts 180°
out of phase on each deck. The first deck picks
up the first half of the positions; the second
deck picks up the last half of the positions.
Common terminals are tied together by the PC
board circuitry.
A total of 12 decks (6 usable poles) is the
maximum per switch. Switches with the
maximum number of positions (12 for 30°,
or 10 for 36°) will have continuous rotation.
Rotation can be limited to less than the maximum
positions. For example, an 8 position Series 8P36
switch with terminals on one side, would pick
up 5 positions on the first deck and 3 positions
on the second deck.
Price is the same as standard switches with
comparable number of decks and positions.
www.grayhill.com
C
12
HOMING
ROTOR DECK
1
2
11
Series 42, 43, 44, and 54, in 30° or 36°:
Non-shorting and shorting contacts can be
intermixed between poles or decks.
Series 71:
Non-shorting and shorting contacts can be
intermixed between poles in fixed stop switches
only.
decks are used in combination with conventional
decks, it is important to remember that the stop
system limits the rotation of both types of decks.
For example, when a homing rotor deck Is used
in combination with a 6-position conventional
deck, the homing rotor is likewise limited to six
positions.
O-RINGS
10
3
9
4
5
8
6
7
connected to the common, and terminal 1 is
open. In position 2, terminal 3 thru 12 and 1 are
connected to the common, and terminal 2 is
open. A homing rotor deck will function for 25,000
mechanical cycles of operation.
The progressively shorting switch deck connects
consecutive switch positions to the common. For
example, in position 1, terminal 1 is connected
to the common; in position 2, terminals 1 and
2 are connected to the common; in position
CIRCUIT
DIAGRAM
C
PROGRESSIVELY
SHORTING DECK
1
2
14. Shaft and Panel Seal on
Concentric Shaft Switches
The following diagram shows the location of
the O-rings required to seal the shafts to the
bushings. When the concentric shaft switches
are sealed in this manner, the .125 inch diameter
shaft is supplied full round. Bushing-to-panel
sealing is accomplished by the panel seal kit.
15. Fixed Stop, Add-A-Pot
Switches
The rotary switch section of the Add-A-Pot rotary
switches can be built with a fixed mechanism
rather than the standard adjustable stop
mechanism. The front end of a switch of this type
is similar to the Series 43A or Series 54A style
concentric rotary switches. The total number of
decks is limited to three. The Series 43 is limited
to 1 pole per deck. Series 54 to 2 poles per deck.
3
4
5
6
3, terminals 1,2, and 3 are connected to the
common. A progressively shorting deck is limited
to a maximum of 6 positions. A progressively
shorting deck will function for 25,000 mechanical
cycles of operation.
16. Series 54 Concentric Shaft
Switch in 45°, 60°, and 90°
Throws
The Series 54A switch is available with these
angles of throw in Section A of the concentric
rotary switch. Section B is available in 30° angle
of throw only. Section A is limited to 1 to 3 decks,
non-shorting contacts, and 1 or 2 poles per deck.
Homing Rotor or Progressively Shorting decks
can be ordered as a deck of a 44A or 44M style
switch, or their sealed equivalents. Order up to
11 conventional decks and 1 special circuitry
deck. For a good detent feel, the switch is limited
to a total of 12 poles plus the homing rotor or
progressively shorting deck. Example: 6 2-pole
decks and a homing rotor. When these special
Bulletin 1222
Rev 04/14
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