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
DIMENSIONS
in inches (and millimeters)
• 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
PC Mount Style
.203 ± .003
(5,16 ± 0,08)
ACROSS
FLATS
A
DIMENSION
D
POS. 1
OPTIONAL
PANEL SEAL
GASKET
.093 ± .005
(2,36 ± 0,13)
.375±.015
(9,53±0,38)
.250±.015
(6,35±0,38)
.250±.015
(6,35±0,38)
DIMENSION "B"
Side View
22.5°
All others as shown at left
.125±.015
(3,18±0,38)
.171 ± .015
(4,34 ± 0,38)
.125 (3,18)
REF.
GRAYHILL
2 1 10 9
TERMINALS ARE
.016 ± .003 (0,41 ± 0,08) SQ.
COMMON Ø .025 ± .002
(0,64 ± 0,06) AND EXTEND
TO SAME PLANE AS
POSITION TERMINALS
TERMINAL
SEALANT
IN STYLE "T"
TERMINAL SEALANT
IN STYLE T
Ø.125 +.001- .002
(3,18 + 0,03 -0,05)
1/4-28 UNF-2A
THREAD
Grayhill part number and date code
marked on label. Customer part
number marked on request. Military
part number marked when required.
.125 ± .015
(3,18 ± 0,38)
PC TERMINAL DETAIL
All angles of throw, except 22.5°
.020 ± .005
(0,51 ± 0,13)
PC COMMON DETAIL
All angles of throw, except 22.5°
.171 ± .015
(4,34 ± 0,38)
GRAYHILL
2 1 10 9
Rotary Switches
.020 ± .003
(0,51 ± 0,08)
.065 ± .003
(1,65± 0,08)
Ø .025 ± .002
(0,64 ± 0,05)
Angle of
Throw
22.5°
30°
36°
Angle
A
101.25°
105°
108°
Angle of
Throw
45°
60°
90°
Angle
A
112.5°
120°
135°
Dimension
D
Series 50
.500 ± .015
(12,70 ± 0,38)
Series 51
.562 ± .015
(14,27 ± 0,38)
Dimension
B
Style T
.576 ± .015
(14,63 ± 0,38)
All Others
.537 ± .015
(13,64 ± 0,38)
All 22.5°
.537 ± .015
(13,64 ± 0,38)
Solder Lug Style
.250±.015
(6,35±0,38)
.375±.015
(9,53±0,38)
.250±.015
(6,35±0,38)
Dimension B
Dimension C
Dimension E
SOLDER LUG TERMINAL DETAIL
All angles of throw, except 22.5°
.064 ± .005
(1,63 ± 0,13)
.020 ± .005
(0,51 ± 0,13)
.032 ± .004
(0,81 ± 0,10)
.065 ± .003
(1,65 ± 0,08)
SOLDER LUG TERMINAL DETAIL 22.5°
.064 ± .005
(1,63 ± 0,13)
TERMINAL
SEALANT
IN STYLE "T"
.016 ± .004
(0,41 ± 0,10)
Ø.125 + .001 - .002
(3,18 + 0,03 - 0,05)
Front view same as
PC Mount style.
1/4-28 UNF-2A
THREAD
Dimension
B
C
E
30°, 36°, 45°, 60°, 90°
.658 ±.015
(16,71 ±0,38)
.234 ±.015
(5,94 ±0,38)
.153±.015
(3,89±0,38)
22.5°
.591±.020
(15,01±0,50)
.200±.015
(5,08±0,38)
.12±.015
(3,05±0,38)
.021 ± .004
(0,53 ± 0,10)
.046 ± .004
(1,17 ± 0,10)
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
CIRCUIT DIAGRAMS AND REAR VIEWS: Solder Lug and PC Mount
SOLDER LUG
COMMON TERMINAL
(1 POLE)
.382 ± .015 (9,70 ± 0,13)
DIAMETER CIRCLE OF
TERMINAL CENTERS
.156 ± .015
(3,96 ± 0,13)
LOCATION
OF COMMONS
2 POLES
Rear View
PC MOUNT
.500 ± .015
(12,7 ± 0,13)
DIA. CIRCLE
OF CENTERS
Circuit as Viewed From Shaft End
11
10
9
8
7
6
C1
12 13
C2
14
15
16
1
2
11
10
9
8
7
12 13
14
15
16
1
2
11.25˚
POS. 1
22.5˚
11.25˚
POS. 1
22.5˚
.156 ± .015
(3,96 ± 0,13)
22.5° Angle
of Throw
LOCATION
OF COMMONS
TWO POLES
2 POLES
COMMON TERMINAL
(1 POLE)
5 4
3
6
5 4
3
ONE POLE
COMMON TERMINAL (1 POLE)
.382 ± .005 (9,70 ± 0,13)
DIAMETER CIRCLE OF
TERMINAL CENTERS
15˚
30˚
.156 ± .005 (3,96 ± 0,13)
LOCATION OF COMMONS
2 POLES
8
7
6
5
9
10
11
12
1
7
6
8
9
10
C2
11
12
1
C1
POS. 1
4
3
2
5
4
3
2
ONE POLE
8
9
10
C3
C2
C1
TWO POLES
9
C3
C2
11
12
1
2
7
6
8
10
C4
C1
11
12
1
2
30° Angle
of Throw
POS. 1
POLE 1
DIM. A ±
.005 (0,13)
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.
.175 ± .005
(4,45 ± 0,13)
DIAMETER
CIRCLE OF
COMMON
CENTERS
7
6
5
4
3
5
4
3
THREE POLES
FOUR POLES
COMMON TERMINAL (1 POLE)
.320 ± .015 (8,13 ± 0,38) DIAMETER
CIRCLE OF TERMINAL CENTERS
.125 ± .015
(3,18 ± 0,38)
LOCATION OF COMMONS
2 POLES
COMMON TERMINAL (1 POLE)
.320 ± .015 (8,13 ± 0,38) DIAMETER
CIRCLE OF TERMINAL CENTERS
.125 ± .015
(3,18 ± 0,38)
LOCATION OF COMMONS
2 POLES
7
6
5
4
8
9
10
1
6
5
7
8
C2
C1
Rotary Switches
9
10
1
18˚
POS. 1
36˚
36° Angle
of Throw
3
2
4
3
2
ONE POLE
TWO POLES
6
5
4
3
7
8
1
2
5
4
6
C2
C1
7
8
1
22.5˚
POS. 1
45˚
45° Angle
of Throw
ONE POLE
2
3
TWO POLES
COMMON TERMINAL (1 POLE)
.320 ± .015 (8,13 ± 0,38) DIAMETER
CIRCLE OF TERMINAL CENTERS
4
5
6
4
C2
C1
5
6
30˚
POS. 1
60˚
.125 ± .015
(3,18 ± 0,38)
3
1
2
ONE POLE
3
1
2
60° Angle
of Throw
LOCATION OF COMMONS
2 POLES
TWO POLES
COMMON TERMINAL (1 POLE)
.320 ± .015 (8,13 ± 0,38)
DIAMETER CIRCLE OF
TERMINAL CENTERS
45˚
POS. 1
90˚
LOCATION OF COMMONS
2 POLES
.125 ± .015
(3,18 ± 0,38)
2
1
ONE POLE
2
3
4
3
C2
C1
4
90° Angle
of Throw
1
TWO POLES
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
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.
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
Series 51 qualified switches may be ordered
by the ‘M’ number or by the Grayhill part
number.
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.
At 85°C, atmospheric pressure
200 mA,
28 Vdc resistive
150 mA,
115 Vac resistive
30 mA,
28 Vdc inductive
100 mA,
28 Vdc lamp load
75 mA, 220 Vac lamp load
At 25°C, reduced pressure (70,000 feet)
200 mA,
28 Vdc resistive
150 mA,
115 Vac resistive
75 mA, 220 Vac resistive
Contact Resistance:
20 milliohms maximum,
(10 milliohms initially).
Insulation Resistance:
1,000 Mohms
minimum between mutually insulated parts.
Voltage Breakdown:
600 Vac minimum
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.
SPECIFICATIONS: Other
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.
Materials and Finishes
Rotary Switches
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
plate.
Terminals:
Brass, gold‑plated over silver plate
and nickel plate
Rotor Contact:
Precious metal alloy, gold‑plated
Panel Seal:
Silicone rubber
Shaft Seal:
Fluorosilicone
Mounting Nuts:
Brass, tin‑zinc plated
Mounting Hardware:
One mounting nut .089"
thick by .375" across flats and one internal
tooth lockwasher are supplied with the switch.
Maximum Mounting Torque:
15in‑lbs
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.
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.
1/4" SHAFT: Style K
.219
±.004
.250
±.015
.250 +.001
-.002
.340
±.005
.250
±.015
.375
±.015
3/8-32 UNEF-2A
THREAD
CIRCLE SHOWING
DIMENSIONS OF
HOLE BE CUT
TO
IN P
ANEL.
0.208
1/8"Shaf
t
Ø0.254
POS.
1
"E" Style
Ø0.280
"K" Styl
e
Ø0.380
POS.
1
0.240
POS.
1
0.350
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
SUGGESTED ADJUSTABLE STOP
SUBSTITUTION GUIDE
Fixed
Stop
Style
50A
50C
50CP
50M
50MP
50P
50S
50SP
Adj. Stop
Style
Equivalent
50D
50CD
50CDP
50CD*
50CDP*
50DP
50D*
50DP*
Fixed
Stop
Style
51A
51C
51CP
51M
51MP
51P
51S
51SP
Adj. Stop
Style
Equivalent
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.
Stop
Blade
Slots
Plastic
Washer
Stop
Blades
*Form fit and function equivalents, but not watertight sealed
to the panel.
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.
.400
± .005
DIA.
(10,16
± 0,13)
.250 ± .003
(6,35 ± 0,08)
.025
± .001
(0,64
± 0,03)
90° ± 1°
.015
(0,38)
RADIUS
MAX.
.125
± .005
(3,16
± 0,13)
.060 ± .001
(1,52 ± 0,25)
SEAL
SCREWDRIVER SLOTTED SHAFT: Style B
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.
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
Rotary Switches
.032±.005
(0,81±0,13)
"A"
.125±.015
(3,18±0,38)
11,13
± 0,13
DIA.
90° ± 1°
0,64
± 0,05
.050±.005
(1,27±0,13)
5,08
± 0,05
C
L
.015
(0,38)
RADIUS
MAX.
2,36
± 0,13
1,57 ± 0,08
METRIC SHAFT AND BUSHING: Style E
9,53
±0,38
6,0±0,08
"A"
6,35
±0,38)
7,0
±0,51
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.
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.
3,15
±0,12
4,0
±0,03
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
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)
E = Metric, 4mm Shaft
K = 1/4" Shaft
M = Military
P = PC Mount Terminals
S = Shaft/Panel Seal (S/P Seal)
T = Process Sealed
Standard Style
Style Choices
1
1/4" Shaft
K
KS
KST
KT
KB
KBS
KBST
KT
Angle
of
Throw
36°
45°
60°
90°
36°
45°
PC Mount
60°
90°
Number
of
Poles
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
Number of
Positions
Per Pole
02 thru 10
02 thru 05
02 thru 08
02 thru 04
02 thru 06
02 or 03
02 thru 04
02
02 thru 10
02 thru 05
02 thru 08
02 thru 04
02 thru 06
02 or 03
02 thru 04
02
Shorting or
Non-Shorting
Contacts
N or S
N or S
N
N
N
N
N
N
N or S
N or S
N
N
N
N
N
N
Series
Std., 1/8" Shaft
A
AT
B
BS
BST
BT
D
S
ST
Metric, 4mm Shaft
E
ES
EST
ET
EB
EBS
EBST
EBT
Terminals
Solder
Lug
50
BP
BPT
BSP
BSPT
DP
P
PT
SP
SPT
Rotary Switches
KP
KPT
KSP
KSPT
KBP
KBSP
KBSPT
KBT
EP
EPT
ESP
ESPT
EBP
EBSP
KBSPT
EBT
Military Style
Style Choices
1/4" Shaft
Angle
of
Throw
36°
KM
KMB
KMBT
KMT
EM
EMB
EMBT
EMT
45°
60°
90°
36°
KMBP
KMBPT
KMP
KMPT
EMBP
EMBPT
EMP
EMPT
45°
PC Mount
60°
90°
Number
of
Poles
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
Number of
Positions
Per Pole
02 thru 10
02 thru 05
02 thru 08
02 thru 04
02 thru 06
02 or 03
02 thru 04
02
02 thru 10
02 thru 05
02 thru 08
02 thru 04
02 thru 06
02 or 03
02 thru 04
02
Shorting or
Non-Shorting
Contacts
N or S
N or S
N
N
N
N
N
N
N or S
N or S
N
N
N
N
N
N
Series
Std., 1/8" Shaft
C
CB
CBT
CD
CT
M
MB
MBT
MT
Metric, 4mm Shaft
Terminals
Solder
Lug
50
CBP
CBPT
CDP
CP
CPT
MBP
MBPT
MP
MPT
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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