Single Deck Rotary Switches
SERIES 77
0.5" Diameter, 200 mA
0.18" Behind Panel
Features
• Small Size - Minimal Space Required
Behind Panel
• Available with Continuous Rotation
or a Fixed Stop
• High Stop Strength
• Shaft and Panel Seal
• Process Seal available
• Single Deck with 1 or 2 Poles
APPLICATIONS
• Handheld Radios
• Handheld Medical Devices
• Night Vision Products
• Laser Aiming Devices
DIMENSIONS
in inches [and millimeters]
.625
[ 15,88 ]
Ø.500
[ 12,7 ]
TERMINAL VIEW
1 POLE
Rotary Switches
.314 ±.008
[ 7,98 ±0,2 ]
.340 ±.005
[ 8,64 ±0,12 ]
.250 ±.005
[ 6,35 ±0,12 ]
Ø.326
[ 8,28 ]
Ø.200 ±.010
[ 5,08 ±0,25 ]
CIRCLE OF TERMINAL
CENTERS
.250 ±.005
[ 6,35 ±0,12 ]
Ø.125 ±.001
[ 3,18 ±0,02 ]
Ø.200 ±.004
[ 5,08 ±0,1 ]
18°
TERMINAL 1
HOUSING
FLAT
18°
SHAFT FLAT
POS.1
.109 ±.010
[ 2,77 ±0,25 ]
.375
[ 9,53 ]
REF
.094 ±.005
[ 2,39 ±0,12 ]
Unless otherwise specified, tolerances are ± .015 inch and ± 3 degrees
RECOMMENDED PANEL CUT-OUT
.066 ±.010
[ 1,68 ±0,25 ]
.180
[ 4,57 ]
3/8-32 UNEF-2A
THREAD
[
+.005
-.000
+0,12
-0,00
9,53
]
.072
[ 1,83 ]
Ø.200
[ 5,08 ]
36°
POSITI0N 1
+.003
-.000
+0,07
8,76
-0,00
.345
[
COMMON 2
TERMINAL 1
TERMINAL 1
TERMINAL 1
Recommended Mounting Torque: Tighten
mounting hex nut to 12 in-lb (15 in-lb max).
Before applying torque, rotation of the switch
housing must be constrained by the housing
flat via the "Recommended Panel Cut-Out"
or similar method. Constraining by PCB or
anything soldered to the terminals will result
in damage to the switch
]
36°
11X Ø .024 ±.004
[ 0,61 ±0,1 ]
Ø.008 [0,2]
*
]
[
TERMINAL VIEW
2 POLE
2 POLE LAYOUT
Ø.200
[ 5,08 ]
+.003
-.002
+0,07
0,38
-0,05
11X Ø .015
COMMON TERMINAL
RECOMMENDED PCB LAYOUT (VIEWED FROM SWITCH SIDE OF PCB)
1 POLE LAYOUT
Ø.375
10X 36°
12X Ø .024 ±.004
[ 0,61 ±0,1 ]
Ø.008 [0,2]
*
.072 ±.005
[ 1,83 ±0,12 ]
COMMON 1
12X Ø .015
[
*CUSTOMER TO ESTABLISH PCB DATUMS FOR HOLE PATTERN PLACEMENT
+.003
-.002
+0,07
-0,05
0,38
]
Grayhill part number and date code marked
on label. Customer part number marked on
request.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
Series
50
Series
75
Series
77
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Single Deck Rotary Switches
Rated Loads
Switches are rated to make and break the following loads:
Environment
Condition
Lamp Load
Inductive Load (140mH)
Resistive Load
Cycles
Milliamp
Volts
Milliamp
Volts
Milliamps
Volts
50
28 VDC
30
28 VDC
50
12 VDC
25,000
10
28 VDC
25,000
50
28 VDC
10,000
100
28 VDC
7,500
Atmospheric
Pressure
Reduced
Pressure
(70,000 feet)
200
28 VDC
5,000
50
115 Vrms
10,000
100
28 VDC
7,500
One cycle is 360-degree rotation and a return
through all switch positions to the starting
position.
Electrical Specifications
Mechanical / Environmental Ratings
Operating Temperature: -40°C to +85°C
Storage Temperature: -65°C to +100°C
Altitude: 70,000 feet
Rotational Torque: 3 in-oz min. to 7 in-oz
max
Stop Strength: 7.5 inch pounds min
Withstanding Shaft Push Force: 100
pounds
Weight: 4.7 grams with hardware
3.9 grams without hardware
Vibration: MIL-DTL-3786, MIL-STD-202,
method 204, condition "B"
Shock: MIL-DTL-3786, Medium impact per
MIL-STD-202, Method 213.
Moisture Resistance: MIL-DTL-3786, MILSTD-202, Method 106
Salt Spray: MIL-DTL-3786, MIL-STD-202,
method 101, condition "B"
Explosion Proof: MIL-DTL-3786, MIL-STD
202, method 109
Immersion: With shaft operation – Shaft and
panel seal withstands water pressure of 15
psi minimum per MIL-DTL-3786 (Equivalent to
33ft [10m] immersion for 30 minutes).
Without shaft operation - Shaft and panel
sealed to withstand 74ft [22m] immersion for 2
hours, MIL-DTL-810G Method 512.5.
Sand and Dust: MIL-DTL-3786, MIL-STD202 Method 110
Flux Seal (Process Sealed Versions): Level
1 & 2 per MIL-DTL-3786.
Materials and Finishes
Switch Base: Diallyl Phthalate per MIL-M-14
Bushing: Zinc alloy, tin zinc plating
Detent Rotor: Nylon
Detent Balls: Steel, nickel-plated
Contact Spring: Tinned music wire
Detent Spring: Stainless steel
Shaft: Stainless steel
Shaft Seal: Ethylene Propylene
Panel Seal: Silicone
Rotor Contact: Silver cad-oxide, gold-plated
Terminals and Common: Brass, gold plate
.00002" minimum thickness over silver plate
.0003" minimum.
Mounting Hardware: One mounting nut .089"
thick by .433" across flats and one external tooth
lockwasher supplied with each switch. Mounting
nut is brass, nickel plated and lockwasher is
stainless steel.
Additional Characteristics
Contact Type: Non-shorting, wiping contacts
Terminals: Switches are provided with the full
circle of terminals regardless of the number of
active positions.
Contact Grayhill if the life limiting criteria is more critical than those listed, if the required cycles of operation are greater than those listed,
if a larger make and break current is required than the one listed for the desired number of cycles, or if elevated temperatures or reduced
pressures are part of the operating environment.
ORDERING INFORMATION
77SPT36-01-1-10N-F
Series 77
S = Shaft & Panel Sealed, leave blank for no shaft & panel seal
P = PC Terminals
T = Process Seal, Leave blank for no process seal
Angle of throw: 36 = 36°
Number of Decks: 01 Only
Stop arrangement: Needed only with 1 pole switches with maximum positions.
Leave blank for continuous rotation; add F for fixed stop.
Contacts: N = Non-shorting
Positions per pole: 02 up to 10 positions (1 pole),
02 up to 05 positions (2 poles)
Poles per deck: 1 or 2
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
Rotary Switches
Low Level Circuit Rating: 10 milliamperes,
30 millivolts DC or Peak AC open-circuit voltage,
25,000 cycles
Contact Resistance: 50 milliohms max
(15 milliohms initially).
100 milliohms max low level.
Insulation Resistance: 50,000 Mohms initially
(10,000 Mohms after life) at 100 VDC
Voltage Breakdown: 600 Vac initially,
250 Vac after life