Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Multi-Deck Rotary Switches
SERIES 08
SERIES 09
0.5" Diameter, 1/4 Amp,
Standard, Military SR13
Features
• Proven Quality in Thousands of
Applications
• Gold-plated Contact System
• 30°, 36°, 45°, 60° and 90° Angle
of Throw Options
• MIL Qualified Versions MIL-S-3786/13
in inches (and millimeters)
Standard Style
Rear Views
Series 09
30° Angle of Throw
Front view shows terminal location
of Series 8, 36° angle of throw.
Transpose rear view for terminal
location of other angles of throw.
.135 ± .015 (3,43 ± 0,38)
11
1 12
#0 THREAD
.250 ± .020
(6,35 ± 0,51)
15°
10 9
.562 (14,27) SER. 8
.625 (15,88) SER. 9
12
14
16
18
20
22
16.0
18.5
21.0
23.5
26.0
28.5
7
8
9
10
11
12
2.818 (71,58)
3.086 (78,38)
3.354 (85,19)
3.622 (91,00)
3.890 (98,81)
4.158 (105,61)
.312 (7,92)
.312 (7,92)
.312 (7,92)
.312 (7,92)
.312 (7,92)
.312 (7,92)
24
26
28
30
32
34
31.0
33.5
36.0
38.5
41.0
43.5
10 9
36°
COMMON
LUG
Grayhill part number and date code marked on standard style detent cover label.
Customer part number marked on request. Grayhill part number and date code
printed on military style cover. Military number printed when required.
7
GRAyHILL
8
Approx. Weight
Grams
Srs. 08 Srs. 09
1
Dimension
B
2
.062 (1,57)
.062 (1,57)
.062 (1,57)
.062 (1,57)
.062 (1,57)
.312 (7,92)
Dimension
A
4
.960 (24,38)
1.228 (31,19)
1.496 (38,00)
1.764 (44,81)
2.032 (51,61)
2.550 (64,77)
Grams
Srs. 08 Srs. 09 Decks
5
Dimension
B
.500 ± .020
(12,7 ± 0,51)
DIA.
6
1
2
3
4
5
6
Dimension
A
.687 ± .015
(17,45 ± 0,38)
OVER
TERMINALS
INTEGRAL ASSEMBLy NUT,
DO NOT REMOVE
1/4-32 UNEF-2A THREAD
Note: Common location for a single pole per
deck switch. For common location on
multi-pole switches, see circuit diagrams.
No.
of
Decks
Series 08
36° Angle of Throw
COMMON LUG
.045 ± .003 (1,14 ± 0,08) DIA.
HOLE AFTER PLATING
NON-TURN TAB .062 ± .005
(1,58 ± 0,13) WIDE By
.020 ± .003 (0,51 ± 0,08) THICK
COMMON LUG
3
Rotary Switches
SEE NOTE
.387 (9,83) SER.8
.453 (11,51) SER. 9
± .015 (0,38)
30°
.125 + .001 – .002
(3,18 + 0,03 – 0,05)
DIA.
8
GRAyHILL
DIM. B REF.
STUD
PROJECTION
7 6 5
.094 ± .010
(2,38 ± 0,25)
.375 ± .020
(9,53 ± 0,51)
.750 ± .015
(19,05 ± 0,38)
OVER TERMINALS
2
CL OF NON-TURN
TAB
DIM. A + .046 – .020
(+ 0,05 – 0,51)
.312 ± .020
(7,92 ± 0,51)
3
.260 ± .015
(6,60 ± 0,38)
.562 ± .020
(14,27 ± 0,51)
DIA.
4
Dimensions
.033 ± .002
(0,84 ± 0,05) DIA.
HOLE AFTER
PLATING
For rear view of 45°, 60° and 90°,
see circuit diagrams.
Recommended Panel Cutout
Sealed Version
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
Non-Sealed Version
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.
Multi-Deck Rotary Switches
CIRCUIT DIAGRAMS: Solder Lug Terminals
Switch is Viewed From Shaft End and Shown in Position No. 1
Note: All common terminals are located above base terminals as shown.
7
12
6
1
12
5
4
ONE POLE
3
C3
9
9
12
C
L
1 C1
5
2
C2
C3
C4
8
12
C
L
1 C1
6
5
4
2
3
3
4
C4
C5
9 10
7
6
C3
5
3
C2
4
FOUR POLE
9
6
5
C
L OF
NON-TURN
TAB
C2
C1
5
10
1
4
3
7
9
10 C
L
4
1
3
2
C1
2
TWO POLE
4
1
7
6
C2
5
4
CL
1 C1
C1
2
C3 5
8
4
1
2
3
7
6
8
COMMON LUG
SINGLE POLE
CL
C1
15°
6
45°
2
3
7
4
5
8
Rear Views
C4
C2
C
L
1 C1
1
3
2
ONE POLE
TWO POLE
C
L OF
NON-TURN
TAB
4
CL
1 C1
3
C2
2
4
5
6
4
15°
1
C1
COMMON LUG
SINGLE POLE
6
60°
2
THREE POLE
4
COMMON LUG
SINGLE POLE
4
2
ONE POLE
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
2
1
15°
2
C
L
1 C1
C1
1
3
C2 3
3
GRAyHILL
C2
5
6
GRAyHILL
4
3
Series 09
90° Angle
of Throw
C3
5
4
Series 09
60° Angle
of Throw
C
L OF
NON-TURN
TAB
6
THREE OR FOUR POLE
2
5
TWO POLE
3
ONE POLE
90°
TWO POLE
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
C
L OF
NON-TURN
TAB
7
3
FIVE OR SIX POLE
5
Series 09
45° Angle
of Throw
C
L
C1
8
6
ONE POLE
6
1
2
8
Series 08
36° Angle
of Throw
8
C6
11
12
C2
7
2
THREE POLE
10 11
7
11
6
TWO POLE
8
10
7
C
L
1 C1
6
2
3
8
11
1
4
10
C2 7
C1
5
9
8
GRAyHILL
Series 09
30° Angle
of Throw
C
L OF
NON-TURN
TAB
11
2
8
10
3
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.
Multi-Deck Rotary Switches
SERIES 08
SERIES 09
.5" Diameter, 1/4 Amp, PC Mount
Features
• Gold-plated Contact System
• 30°, 36°, 60° or 90° Angle of
Throw Options
• Compatible with Logic Level
Voltages and Currents
Dimensions in inches (and millimeters)
PC Mount Style
Rear Views
Series 09
30° Angle of Throw
2
.187 ± .015
(4,75 ± 0,38)
TyP.
COMMON LUG
INTEGRAL ASSEMBLy NUT,
DO NOT REMOVE
1/4-32 UNEF-2A THREAD
Note: Common location for a single pole per
deck switch. For common location on
multi-pole switches, see circuit diagrams.
5
TERMINAL DIMENSIONS AT
THIS POINT ARE .032 + .000 – .010
(0,81 + 0,00 – 0,25) WIDE
By .015 + .000 – .003
(0,38 + 0,00 – 0,08) THICK
.140 ± .015
(3,56 ± 0,38)
TyP.
.500 ± .020
(12,7 ± 0,51)
DIA.
7
Grayhill part number and date code marked on detent cover label. Customer part
number marked on request.
2
3
10
9
Special switches with one-sided termination can be made for circuitry which would
require two-sided termination in standard switches. Contact Grayhill for a special
part number. See also Special Options, page J-10.
1
9
*Termination
A standard switch uses the entire 360° of each deck as required by the circuitry.
Thus one-sided termination is standard for Series 08, 36°, 1 pole switches with 1
to 5 positions per pole; it is also standard for Series 09, 30°, 1 pole switches with 1
to 6 positions per pole. Two-sided termination is standard for 1 pole switches with
more positions per pole and for switches of 2 or more poles per deck.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
Series 08
36° Angle of Throw
4
SEE NOTE
1.200 ± .020
(30,48 ± 0,51)
TyP.
GRAyHILL
NON-TURN TAB .062 ± .005
(1,58 ± 0,13) WIDE By
.020 ± .003 (0,51 ± 0,08) THICK
3
#0 THREAD
.562 (14,27) SER. 8
.625 (15,88) SER. 9
± .015 (0,38)
.125 + .001 – .002
(3,18 + 0,03 – 0,05)
DIA.
GRAyHILL
4
CL CL CL
5
.250 ± .020
(6,35 ± 0,51)
.134
± .010
(3,40
± 0,25)
6
.375 ± .020
(9,53 ± 0,51)
.134 ± .010
(3,40 ± 0,25)
11
8
.588 ± .020
(14,73 ± 0,51)
6
.135 ± .015 (3,43 ± 0,38)
CL OF NONTURN
TAB
12
1
DIM. B REF.
STUD
PROJECTION
9
Rotary Switches
.094 ± .010
(2,38 ± 0,25)
DIM. A + .046 – .020
(+ 0,05 – 0,51)
.312 ± .020
(7,92 ± 0,51)
10
.260 ± .015
(6,60 ± 0,38)
.070 ± .010
(1,78 ± 0,25)
TyP.
.140 ± .015
(3,56 ± 0,38)
TyP.
.562 ± .020
(14,27 ± 0,51)
DIA.
7
Front view shows terminal location of
36° angle of throw. Transpose rear view
for terminal location of 30° angle of
throw. See Circuit Diagrams for 60° and
90° angles of throw.
.187 ± .015
(4,75 ± 0,38)
TyP.
1.125 ± .020
(28,58 ± 0,51)
TyP.
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.
Multi-Deck Rotary Switches
CIRCUIT DIAGRAMS: PC Mount
Switch is Viewed From Shaft End and Shown in Position No. 1
Note: All common terminals are located above base terminals as shown.
11
Series 09
30° Angle
of Throw
12
1
C
L OF
NON-TURN
TAB
2
10
3
9
4
7
3
9
4
8
C
L OF
NON-TURN
TAB
10
4
Series 09
90° Angle
of Throw
C1 C
L
6
C2
1
5
2
4
3
ONE POLE
C1 C
L
3
TWO POLE
C
L OF
NON-TURN
TAB
1
3
4
2
1
C2
C1
4
2
C1 C
L
4
6
ONE POLE
C1
4
2
7
5
1
2
C2 8
C1
C
L OF
NON-TURN
TAB
5
1
9
3
6
C1 CL
TWO POLE
2
7
Series 09
60° Angle
of Throw
5
6
7
1
9
Series 08
36° Angle
of Throw
6
2
10
ONE POLE
10
1
8
5
6
12
C2
C1
8
11
5
3
3
TWO POLE
ONE POLE
TWO POLE
PC Board Mounting Pattern
36° Angle of Throw
30°, 60° and 90° Angle of Throw
.134 (3,40) TyP.
.134 (3,40) TyP.
TyP.
C
D
SHAFT END
OF SWITCH
.140
(3,56)
TyP.
A
SHAFT END
OF SWITCH
B
C
E
BASE TERMINAL
ROW HOLE LOCATION
(SEE CHART)
Number of Poles
Per Deck
Common Terminal
Hole Location
1 Pole Per Deck
2 Poles Per Deck
A
A
F
E
D
.140
(3,56)
.070 TyP.
(1,78)
COMMON TERMINAL ROW
HOLE LOCATION (SEE CHART)
Angle of Throw
30°
60°
90°
Base Terminals
Hole Location
All
E and F
D and F
Diagrams shown for a two deck switch. Bushing mounting is
recommended for all PC mount rotary switches.
Shaft and Panel Seal
A shaft and panel seal is available to provide watertight mounting of the Series 08
and 09. Standard and Military Style rotary switches. Sealing is accomplished by
O-ring shaft seal and panel seal washer. When the panel seal is compressed,
dimensions are approximately the same as an unsealed switch. Sealed switches
are provided with a double flat bushing. Non-turn feature can be accomplished by
proper fit of this bushing into panel hole and/or by allowing non-turn tab to extend
into (but not through) panel. Military Style rotary sealed switches do not have a
non-turn tab.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
.134 (3,40) TyP.
.210
.280 (5,33)
(7,11) TyP.
.134 (3,40) TyP.
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Multi-Deck Rotary Switches
MILITARY QUALIFIED
10 9
GRAYHILL
1 12
GRAYHILL
1
36°
7
4
2
3
SEE NOTE
.094 ± .010
(2,38 ± 0,25)
Note: Common location for a single pole per
deck switch. For common location on
multi-pole switches, see circuit diagrams.
8
8
5
15°
10 9
.500 ± .020
(12,7 ± 0,51)
DIA.
6
11
4
CLOF NON-TURN
TAB
.718 ± .020
(18,24 ± 0,51)
OVER
TERMINALS
2
.260 ± .015
(6,60 ± 0,38)
.562 ± .020
(14,27 ± 0,51)
DIA.
.781 ± .020
(19,83 ± 0,51)
OVER TERMINALS
Series 08
36° Angle of Throw
7 6 5
The military style is dimensionally the same as
the standard except for the solder lug. Convert
standard style switch drawings to military style
drawings by including this terminal detail and
changing the over-terminal dimensions shown
here. Grayhill can provide complete specification
drawings. Qualified switches can be ordered by
the Grayhill number or the "M" number; they will
be marked per MIL-DTL-3786/13.
Series 09
30° Angle of Throw
Front view shows terminal location of
Series 09, 30° angle of throw. Transpose
rear view for terminal location of other
angles of throw.
3
Series 08 and 09 military switches are qualified
to MIL-DTL-3786/13. They include 30°, 36°, 45°
and 60° angles of throw with solder lug terminals
in sealed and unsealed styles. See front and rear
views at right. Standard variations which do not
affect switch performance can also be marked as
qualified product–contact Grayhill.
30°
Terminal Detail
.034 ± .003
(0,86 ± 0,08)
.068 ± .005
(1,73 ± 0,13)
SPECIFICATIONS
Electrical Ratings - Standard Style
Rotary Switches
Rated: To make and break the following loads:
1/4 amp, 115 Vac resistive; 1/4 amp, 6-28 Vdc
resistive; 20 mA, 115 Vdc resistive; 50 mA, 115
Vac inductive; 20 mA, 28 Vdc inductive; to carry
4 amps continuous.
Contact Resistance: After 25,000 cycles of
operation, 50 milliohms maximum
Insulation Resistance: 1,000 megohms
minimum between terminals and shaft
Voltage Breakdown: 1,000 Vac initially
(500 Vac or better after most environmental
tests)
Life Expectancy: 50,000 mechanical cycles
of operation. Note: Actual life is determined
by a number of factors, including electrical
loading, rate of rotation and environment, as
well as maximum contact resistance, minimum
insulation resistance and minimum voltage
breakdown required at the end of life.
Electrical Ratings - Military Qualified
Qualified to the following MIL-DTL-3786/13
Circuit Values: (Also see Standard Style
description.) The Series 08M and 09M have been
tested to meet the requirements of MIL-S-3786,
Style SR13, the majority of which are listed. At
85°C, approximately 68% relative humidity and
sea level pressure, the switches have been
tested to make and break the following loads, as
stated in MIL-DTL-3786/SR13: 125 milliamperes
at 28 Vdc resistive: 75 milliamperes at 115 Vac
resistive.
The switches have also been tested at reduced
barometric pressure (70,000 feet), 25°C at
approximately 68% relative humidity to make
and break the following loads as stated in
MIL-DTL-3786/SR13. 50 milliamperes 28 Vdc
resistive; 20 milliamperes 115 Vac resistive.
When tested to the above loads at the stated
conditions, the Series 08M and 09M switches
meet the following life-limiting criteria after
25,000 cycles of operation in accordance with
MIL-DTL-3786.
Contact Resistance: 50 milliohms maximum
Materials and Finishes - Military Qualified
after life
Insulation Resistance: 1,000 megaohms
minimum between terminals and shaft
Dielectric Strength: 500 Vac (atmospheric
pressure) and 350 Vac (reduced pressure)
between mutually insulated parts.
The Series 08M and 09M also meet the
requirements of MIL-DTL-3786 SR13 for
moisture resistance, stop strength, rotational
torque, vibration (10 to 2,000 cps), medium and
high shock, salt spray, explosion, thermal shock
(-65°C to 85°C) and terminal pull. When tested
at sea level, 25°C and 68% relative humidity with
failure criteria of 50 milliohms maximum contact
resistance and 500 Vac breakdown voltage, these
switches will make and break 250 mA at 28 Vdc
inductive (250 millihenries): 1/2 amp: at 28 Vdc
resistive: 1/2 amp; at 115 Vac: 60 Hz resistive
for 10,000 cycles of operation.
Materials and Finishes - Standard Style
Switch Bases: Melamine per (MIL-M-14) ASTMD-5948
Cover, Deck Separators and End Plate:
Phenolic per (MIL-M-14) ASTM-D-5948
Rotor Mounting Plate: Thermoplastic
Mounting Bushing: Brass, tin/zinc-plated.
Shaft, Retaining Rings, Through Bolts, Shaft
Extension, Stop Washers, Stop Arm, Thrust
Washers, Nuts, Cover Plate and Rear Support
Plate: Stainless steel
Detent Balls: Steel, nickel-plated
Detent Springs: Tinned Music wire
Terminals, Stator (Base) Contacts and
Common Plate: Brass, gold plate .00001"
minimum over silver plate .0003" minimum
Rotor Contact: Silver alloy, gold-plated .00001"
minimum
Mounting Hardware: Two mounting nuts .062"
(1,57) thick by .312" (7,92) across flats and one
internal lockwasher are supplied with switch.
Lockwasher: Stainless steel
Mounting Nuts,Washers: Brass, tin/zinc-plated
and or stainless steel.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
Deck Separators, End Plate and Switch Bases:
Diallyl per (MIL-M-14) ASTM-D-5948
Rotor Mounting Plate: Thermoplastic
Mounting Bushing: Brass, tin/zinc-plated.
Shaft, Cover, Stop Plate, Retaining Ring,
Through Bolts, Shaft Extension, Stop Arm,
Thrust Washers, Cover Plate and Rear
Support Plate, Lockwashers and Nuts:
Stainless steel
Detent Balls: Steel, nickel-plated
Detent Springs: Tinned music wire
Terminals, Stator (Base) Contacts and
Common Plate: Brass, gold plate .00001"
minimum over silver plate .0003" minimum
Rotor Contact: Silver alloy, gold-plated .00001"
minimum
Mounting Hardware: Two mounting nuts .062"
(1,57) thick by .312" (7,92) across flats and one
internal tooth lockwasher are supplied with this
switch.
Mounting Nuts,Washers: Brass, tin/zinc-plated
and or stainless steel.
ADDITIONAL CHARACTERISTICS
Standard Style and Military Qualified
Contacts: Shorting or Non-shorting contacts
available in 30°, 36° and 45° angle of throw rotary
switches. Non-shorting contacts available in 60°
and 90° angle of throw switches. All are wiping
contacts with over 100 grams of contact force.
Stop Strength: 12 lb-inches minimum
Rotational Torque: 8-64 oz-in depending upon
the number of poles per deck and the number
of decks
Extended Studs: Switches of six decks or
more have longer studs with extra stud nuts for
recommended double end mounting.
Operating Temperature Range (Standard
Style): -40 °C to +85 °C
Operating Temperature Range (MILDTL-3786): -65 °C to +85 °C
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.
Multi-Deck Rotary Switches
choices and limitations
Series
08
Style and Designation
Angle
of Throw
A = Standard
S = Standard, Shaft/Panel Seal
M = Military Style
MS = Style M, Shaft/Panel Seal
P = Standard, PC Mount
SP = Style P, Shaft/Panel Seal
MP = Military Style, PC Mount
MSP = Style MP, Shaft/Panel Seal
A = Standard
S = Standard, Shaft/Panel Seal
M = Military Style
MS = Style M, Shaft/Panel Seal
36°
Stops Terminals
09
A = Standard,
S = Standard, Shaft/Panel Seal
M = Military Style
MS = Style M, Shaft/Panel Seal
A = Standard
S = Standard, Shaft/Panel Seal
P = Standard, PC Mount
SP = Style, Shaft/Panel Seal
01 thru 12
01 thru 09
01 thru 12
01 thru 09
1
2
02 thru 10
02 thru 05
Printed
Circuit
01 thru 12
01 thru 09
01 thru 12
01 thru 09
1
2
02 thru 10
02 thru 05
Solder
01 thru 12
01 thru 09
01 thu 06
01 thru 04
01 thru 03
01 thru 03
01 thru 12
01 thru 09
01 thru 06
01 thru 04
01 thru 03
01 thru 03
1
2
3
4
5
6
02 thru 12
02 thru 06
02 thru 04
02 or 03
02
02
Printed
Circuit
01 thru 12
01 thru 09
01 thru 12
01 thru 09
1
2
02 thru 12
02 thru 06
01 thru 12
01 thru 06
01 thru 04
01 thru 03
01 thru 12
01 thru 06
01 thru 04
01 thru 03
1
2
3
4
02 thru 08
02 thru 04
02
02
Not
Available
01 thru 06
01 thru 03
01 or 02
1
2
3
02 thru 006
02 or 03
02
Printed
Circuit
Not
Available
01 thru 06
01 thru 03
1
2
02 thru 06
02 or 03
Solder
Not
Available
01 thru 06
01 thru 03
1
2
02 thru 04
02
Printed
Circuit
Not
Available
01 thru 06
01 thru 03
1
2
02 thru 04
02
30°
45°
Fixed
Solder
60°
90°
ORDERING INFORMATION
Series:determinedby the angle of throw
Style*:Letter(s) from the Choices and Limitations chart
Angle of throw: Must agree with Series Number
09A30–03–1–12N–F
Stop Arrangement: Add letter F to a one pole per deck switch with the maximum number of positions for a
stop between position 1 and the last position.
type of Contacts: N = Non-shorting; S = Shorting
Positions Per Pole: Requires 02 positions as a minimum to the maximum allowable dependent on the
angle of throw and poles per deck
Poles Per Deck: As limited by angle of throw and switch style
Number of Decks: As limited by the angle of throw, the poles per deck, switch style and types of
contacts
* 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
Rotary Switches
P = Standard, PC Mount
SP = Style P, Shaft/Panel Seal
MP = Military Style, PC Mount
MSP = Style MP, Shaft/Panel Seal
Solder
Fixed
P = Standard, PC Mount
SP = Style P, Shaft/Panel Seal
MP = Military Style, PC Mount
MSP = Style MP, Shaft/Panel Seal
A = Standard,
S = Standard, Shaft/Panel Seal
M = Military Style
MS = Style M, Shaft/Panel Seal
Number of Decks
Poles
Number of
Shorting Non-Shorting Per Deck Positions/Pole
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.
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.
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
Single Deck Switch Series Multi-Deck Switch Series
24 50/51 56 75 77 5000 08/09 42/44 43/54 53,57,59 71
—
—
15
1
—
—
.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
Single Deck Switch Series
Multi-Deck Switch Series
In Inches (& Millimeters) 19 24 50 51 56 75 77 5000 08 09 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
— — — — — —
() (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.
FACTOR: Circuitry
Max. Positions
1 Deck (1Pole)*
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)
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
.095 (2,41)
.280 (7,11)
45°
.062 ± .003
(1,57 ± 0,08)
DIAMETER
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.
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.
Switch
Options For Styles A and S
Options For All Styles
Series# 1 2 3 4 5 6 7 8 9 10
11
12
13
14
15
16
.079 (2,01)
Used in place of conventional solder lug terminals.
Taper tab terminals are gold plated.
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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