Rotary Switches
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 ]
TERMINAL VIEW
.500
1 POLE
[ 12,7 ]
.314 .008
.340 .005
.250 .005 .326
[ 7,98 0,2 ]
[ 8,64 0,12 ]
[ 6,35 0,12 ] [ 8,28 ]
.200 .010
.250 .005
[ 5,08 0,25 ]
[ 6,35 0,12 ]
CIRCLE OF TERMINAL
CENTERS
.125 .001
TERMINAL 1
[ 3,18 0,02 ]
.200 .004
[ 5,08 0,1 ]
HOUSING
18 18
FLAT
SHAFT FLAT
.109 .010
10X 36
POS.1
[ 2,77 0,25 ]
.375
+.003
.066 .010 11X .015
[ 9,53 ]
-.002
[ 1,68 0,25 ]
REF
.094 .005 +0,07
COMMON TERMINAL
0,38
[ 2,39 0,12 ] [ -0,05 ]
.180
[ 4,57 ]
3/8-32 UNEF-2A
THREAD
Unless otherwise specified, tolerances are .015 inch and 3 degrees
RECOMMENDED PANEL CUT-OUT RECOMMENDED PCB LAYOUT (VIEWED FROM SWITCH SIDE OF PCB) TERMINAL VIEW
2 POLE
1 POLE LAYOUT
2 POLE LAYOUT
COMMON 2
.200 .200
TERMINAL 1
.072
[ 5,08 ] [ 5,08 ]
[ 1,83 ]
+.005
.375
-.000
36 36
+0,12
9,53
[ -0,00 ]
POSITI0N 1
TERMINAL 1 TERMINAL 1
.072 .005
[ 1,83 0,12 ]
11X .024 .004
12X .024 .004 COMMON 1
[ 0,61 0,1 ]
[ 0,61 0,1 ]
.008 [0,2] * +.003
.008 [0,2] *
+.003
12X .015
.345
-.002
-.000
+0,07
+0,07 0,38
8,76 *CUSTOMER TO ESTABLISH PCB DATUMS FOR HOLE PATTERN PLACEMENT
[ -0,05 ]
[ -0,00 ]
Recommended Mounting Torque: Tighten Grayhill part number and date code marked
mounting hex nut to 12 in-lb (15 in-lb max). on label. Customer part number marked on
Before applying torque, rotation of the switch request.
housing must be constrained by the housing
flat via theRecommended Panel Cut-Ou
or similar method. Constraining by PCB or
anything soldered to the terminals will result Series
77
Series
in damage to the switch
Series
75
50
Grayhill, Inc. 561 Hillgrove Avenue LaGrange, Illinois 60525-5997 USA Phone: 708-354-1040 Fax: 708-354-2820 www.grayhill.comRotary Switches
Single Deck Rotary Switches
RATED LOADS
Switches are rated to make and break the following loads:
Inductive Load
Lamp Load Resistive Load
Environment Cycles Cycles
(140mH)
Condition Non-shorting Shorting
Milliamp Volts Milliamp Volts Milliamps Volts
50 28 VDC 30 28 VDC 50 12 VDC 25,000 10,000
10 28 VDC 25,000 10,000
50 28 VDC 10,000 10,000
Atmospheric
100 28 VDC 7,500 7,500
Pressure
200 28 VDC 5,000 5,000
50 115Vms 10,000 10,000
10 0.03VDC 25,000 10,000
Reduced
Pressure 100 28 VDC 7,500 7,500
(70,000 feet)
One cycle is 360-degree rotation and a return through all switch positions to the starting position.
Electrical Specifications Shaft Seal: Ethylene Propylene
Contact Resistance: 50 milliohms max Salt Spray: MIL-DTL-3786, MIL-STD-202, Panel Seal: Silicone
(15 milliohms initially). method 101, condition Rotor Contact: Silver cad-oxide, gold-plated
100 milliohms max low level. Explosion Proof: MIL-DTL-3786, MIL-STD Terminals and Common: Brass, gold plate
Insulation Resistance: 50,000 Mohms initially
202, method 109 .00002" minimum thickness over silver plate
(10,000 Mohms after life) at 100 VDC Immersion: With shaft operation Shaft and .0003" minimum.
Voltage Breakdown: 600 Vac initially, panel seal withstands water pressure of 15 Mounting Hardware: One mounting nut .089"
250 Vac after life psi minimum per MIL-DTL-3786 (Equivalent to thick by .433" across flats and one external tooth
33ft [10m] immersion for 30 minutes). lockwasher supplied with each switch. Mounting
Without shaft operation - Shaft and panel nut is brass, nickel plated and lockwasher is
Mechanical / Environmental Ratings
sealed to withstand 74ft [22m] immersion for 2 stainless steel.
Operating Temperature: -40C to +85C
hours, MIL-DTL-810G Method 512.5.
Storage Temperature: -65C to +100C
Sand and Dust: MIL-DTL-3786, MIL-STD-
Altitude: 70,000 feet
Additional Characteristics
202 Method 110
Rotational Torque: 3 in-oz min. to 7 in-oz Contact Type: Non-shorting or Shorting, wiping
Flux Seal (Process Sealed Versions): Level
max contacts
1 & 2 per MIL-DTL-3786.
Stop Strength: 7.5 inch pounds min Terminals: Switches are provided with the full
Withstanding Shaft Push Force: 100 circle of terminals regardless of the number of
pounds
active positions.
Materials and Finishes
Weight: 4.7 grams with hardware
Switch Base: Diallyl Phthalate per MIL-M-14
3.9 grams without hardware
Bushing: Zinc alloy Shorting Characteristics
Vibration: MIL-DTL-3786, MIL-STD-202,
Detent Rotor: Nylon Typical values for current interruption during
method 204, condition
Detent Balls: Steel, nickel-plated shorting:
Shock: MIL-DTL-3786, Medium impact per
Contact Spring: music wire
Temperature Duration
MIL-STD-202, Method 213.
Detent Spring: Stainless steel
Moisture Resistance: MIL-DTL-3786, MIL-
Shaft: Stainless steel Room Temperature to < 0.2 ms
STD-202, Method 106
+85 C
Reduced Temperatures < 20 ms
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
Values present typical current interrupt for a single
one listed for the desired number of cycles, or if elevated temperatures or reduced pressures are bounce in a pulse train of unspecified length when
part of the operating environment.
rotating between switch positions.
ORDERING INFORMATION
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
77SPT36-01-1-10N-F
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; S = Shorting*
Positions per pole: 02 up to 10 positions (1 pole),
02 up to 05 positions (2 poles)
Poles per deck: 1 or 2
*Process seal (T style) is required for all Shorting contact switches
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