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 ]
.314 ±.008
[ 7,98 ±0,2 ]
.250 ±.005
[ 6,35 ±0,12 ]
Ø.125 ±.001
[ 3,18 ±0,02 ]
TERMINAL 1
TERMINAL VIEW
1 POLE
.250 ±.005
[ 6,35 ±0,12 ]
Ø.326
[ 8,28 ]
Ø.500
[ 12,7 ]
Rotary Switches
.340 ±.005
[ 8,64 ±0,12 ]
Ø.200 ±.010
[ 5,08 ±0,25 ]
CIRCLE OF TERMINAL
CENTERS
Ø.200 ±.004
[ 5,08 ±0,1 ]
18°
HOUSING
FLAT
SHAFT FLAT
POS.1
.375
[ 9,53 ]
REF
3/8-32 UNEF-2A
THREAD
.109 ±.010
[ 2,77 ±0,25 ]
.066 ±.010
[ 1,68 ±0,25 ]
.180
[ 4,57 ]
18°
10X 36°
11X Ø .015
COMMON TERMINAL
.094 ±.005
[ 2,39 ±0,12 ]
[
+.003
-.002
+0,07
0,38
-0,05
]
Unless otherwise specified, tolerances are ± .015 inch and ± 3 degrees
RECOMMENDED PANEL CUT-OUT
1 POLE LAYOUT
RECOMMENDED PCB LAYOUT (VIEWED FROM SWITCH SIDE OF PCB)
2 POLE LAYOUT
Ø.200
[ 5,08 ]
.072
[ 1,83 ]
Ø.200
[ 5,08 ]
TERMINAL 1
TERMINAL VIEW
2 POLE
COMMON 2
Ø.375
[
+.005
-.000
+0,12
9,53
-0,00
]
36°
POSITI0N 1
11X Ø .024 ±.004
[ 0,61 ±0,1 ]
Ø.008 [0,2]
*
TERMINAL 1
36°
TERMINAL 1
12X Ø .024 ±.004
[ 0,61 ±0,1 ]
Ø.008 [0,2]
*
COMMON 1
12X Ø .015
+.003
-.002
+0,07
0,38
-0,05
.072 ±.005
[ 1,83 ±0,12 ]
.345
[
+.003
-.000
+0,07
8,76
-0,00
]
*CUSTOMER TO ESTABLISH PCB DATUMS FOR HOLE PATTERN PLACEMENT
[
]
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
Grayhill part number and date code marked
on label. Customer part number marked on
request.
Series
50
Series
75
Series
77
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
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
Milliamp
50
Volts
28 VDC
Inductive Load
(140mH)
Milliamp
30
Volts
28 VDC
Resistive Load
Milliamps
50
10
50
Atmospheric
Pressure
100
200
50
10
Reduced
Pressure
(70,000 feet)
100
Volts
12 VDC
28 VDC
28 VDC
28 VDC
28 VDC
115Vms
0.03VDC
28 VDC
Cycles
Non-shorting
Cycles
Shorting
25,000
25,000
10,000
7,500
5,000
10,000
25,000
7,500
10,000
10,000
10,000
7,500
5,000
10,000
10,000
7,500
One cycle is 360-degree rotation and a return through all switch positions to the starting position.
Electrical Specifications
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
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, MIL-
STD-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-STD-
202 Method 110
Flux Seal (Process Sealed Versions):
Level
1 & 2 per MIL-DTL-3786.
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
Rotary Switches
Materials and Finishes
Contact Type:
Non-shorting or Shorting, wiping
contacts
Terminals:
Switches are provided with the full
circle of terminals regardless of the number of
active positions.
Switch Base:
Diallyl Phthalate per MIL-M-14
Bushing:
Zinc alloy
Detent Rotor:
Nylon
Detent Balls:
Steel, nickel-plated
Contact Spring:
music wire
Detent Spring:
Stainless steel
Shaft:
Stainless steel
Shorting Characteristics
Typical values for current interruption during
shorting:
Temperature
Room Temperature to
+85° C
Reduced Temperatures
Duration
< 0.2 ms
< 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
one listed for the desired number of cycles, or if elevated temperatures or reduced pressures are
part of the operating environment.
Values present typical current interrupt for a single
bounce in a pulse train of unspecified length when
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
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
77SPT36-01-1-10N-F
*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
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