Industrial
16mm Diameter
Carbon Composition
Rotary Potentiometer
Series 270
Electrical and Mechanical Specifications
Resistance Range
500 ohms through 2 Megohms, linear
Resistance Tolerance
Power Rating
Angle of Rotation
Total Rotation (Potentiometer and Switch)
Without Switch: 300°
With Switch: 315°
Effective Electrical Angle (Potentiometer)
Without Switch: 300°
With Switch: 290°
1 - 9 © 2010 CTS Corporation. All rights reserved. Information subject to change. 08/06/10
CTS Electrocomponents www.ctscorp.com
®
Electrocomponents
Data Sheet
Rotary Potentiometer
±30%, ±20%, ±10%
5K ohms through 200K ohms, audio
Dielectric Strength
750 VAC for 1 minute
Maximum Operating Voltage
500 VDC
Insulation Resistance
100 Megohms minimum @ 250 VDC
Rotational Torque
36-360 gf-cm
Stop Strength
5.76 kgf-cm minimum
Push-Pull Strength of Shaft
10 kg for 10 seconds
Rotational life
10K cycles
Operating temperature
-10°C to +70°C
Solder Heat Resistance
260°C for 5 seconds
Features
- Bushing
- Twist or Bend Tab
- Snap-in PC Bracket
- PC Terminal
Mounting Information
- Bushing
- Twist Tab
- Bend Tab
- Snap-in PC Bracket
- PC Terminal
1/4 watts @ 55°C (Resistance up to 100K ohms)
1/5 watts @ 55°C (Resistance above 100K ohms)
Electrical and Mechanical Specifications
Shaft and Bushing Information
Metal Shaft and Bushing
Single tfahS enO htiw retemoitnetoP noitceS lauD ro
Molded Shaft and Bushing
Single Section Potentiometer with One Shaft
Shaft Diameter
inch mm inch mm
.125 3.20 1/4" – 32UNEF-2A M7 X .75P
2 - 9
© 2010 CTS Corporation. All rights reserved. Information subject to change. 08/06/10
CTS Electrocomponents www.ctscorp.com
Bushing Diameter
Outer Shaft Diameter
inch mm inch mm
.236 6.00 .156 4.0
.250 6.35 .125 3..2
Inner Shaft Diameter
inch mm
Bushing Diameter
3/8" – 32UNEF-2A M9 X.75P
Concentric Tandem Potentiometer with Two Shafts
3/8" – 32UNEF-2A M8 X.75P
Shaft with Twist Tab, Bend Tab, Snap-in PC Bracket, or PC Terminal
All metal or molded shaft diameters can be used except .187”(4.7mm), which can be used with snap-in PC bracket only.
.187 4.70 3/8" – 32UNEF-2A M7 X .75P
.236 6.00 3/8" – 32UNEF-2A M8 X .75P
.250 6.35 3/8" – 32UNEF-2A M9 X .75P
Shaft Diameter
inch mm inch mm
.156 4.00 1/4" – 32UNEF-2A M7 X .75P
Bushing Diameter
.187 4.70 3/8" – 32UNEF-2A M7 X .75P
.236 6.00 3/8" – 32UNEF-2A M8 X .75P
.250 6.35 3/8" – 32UNEF-2A M9 X .75P
.156 4.00 1/4" – 32UNEF-2A M7 X .75P
Terminal Information
T: Solder lug perpendicular to shaft. Or, solder lug formed 60° to the rear.
U: PC terminals formed 90° forward toward mounting surface. Terminals extend .187" (4.7mm) beyond mounting surface.
V: PC terminals formed 90° to the rear, away from panel mounting. Terminals extend .442" (11.2mm) from mounting surface.
Standard:
T: Solder lug formed 90° to the rear on single section and formed 60° on multi-section.
X: PC terminals standard .438" (11.1mm) from center line of control to PC board, straight terminals extend .156" (4.0mm)
into PC board.
Special:
W: Wire wrap terminals — .156" (4.0mm) terminal extension beyond base, formed 60° to the rear.
Electrical and Mechanical Specifications
ELECTRICAL
SERIES TYPE RATING
5A @ 20 VDC
3A @ 125 VAC
(UL approved)
DIMENSION: mm
inch
DIMENSION: mm
inch
ELECTRICAL
SERIES TYPE RATING
Push On-Pull Off
DEMI Momentary Contact 3A @ 20 VDC
Push On
Switch Actuating Torque - 2 to 10 in. oz.
(144 to 720gf-cm)
9.1
.358
0.4
.016
3.2
.126
15.9
.626
7.21=X
5.51=Y
005.
016.
3.6
.142
4.374.37
.172 .172
Ø1.40 MIN. (2)HL'S
.055
15.3
.602
0.8 0.4
4.37 4.37
4.50
4.50
.031 .016
.172
.172
.177 .177
Ø1.40 MIN. (2)HOLES
.055
0.2
.008
0.4
.016
256.
6.61
.205
5.2
.150
3.8
9.0
.354
T= Ø2.41
.095 HOLES(2)
11.15
.439
057 Rotary
DEMI 3A @ 20 VDC
3 - 9 © 2010 CTS Corporation. All rights reserved. Information subject to change. 08/06/10
CTS Electrocomponents www.ctscorp.com
Optional Power Switches (All SPST)
DIMENSION: mm
INCH
4 - 9 © 2010 CTS Corporation. All rights reserved. Information subject to change.
08/06/10
CTS Electrocomponents www.ctscorp.com
MOUNTING SURFACE
REF.
Ø1.4 MIN.
Ø15.9
(3) HOLES
123
7.95±0.05
CLEARANCE FOR BUSHING.
CLEARANCE FOR 2.4 X 1.0(.094 X .039)
LOCATING LUG. (2)HOLES.
.313±.002 .313±.002
7.95±0.05
WIPER
13
2
CLOCKWISE
CIRCUIT
CCW CW
RECOMMENDED PCB LAYOUT
9.53
.375
.626
L±0.8
.031
3/8-32UNEF-2A
MOUNTING SURFACE
2.39
.094
7.95
.313
7.95
.313
11.13
15.09
.438
.594
.172±.002
4.37±0.05
.172±.002
4.37±0.05
.162
4.09
.055
270X Metal Shaft, Bushing Mount, Printed Circuit “X” Type Terminals
MOUNTING SURFACE
3
2
1
9.2± 0.4
Ø15.9
.626
9.53
.375
L±0.8
.031
3/8-32UNEF-2A
.362± .16
2.39
.094
7.95
.313
15.9
.626
15.9
.626
7.95
.313
11.13
.438 11.30
.445
WIPER
13
2
CLOCKWISE
CIRCUIT
CCW CW
8.00±0.05
.315±.002 .315±.002
8.00±0.05
CLEARANCE FOR BUSHING
RECOMMENDED PCB LAYOUT
Ø1.4 MIN.
(3) HOLES
.172±.002
4.37±0.05
.172±.002
4.37±0.05
.055
270U Metal Shaft, Bushing Mount, Printed Circuit “U” Type Terminals
MOUNTING HOLE DETAIL
.016
0.4
"A"±
.016
0.4
"A"±
DIMENSION: mm
INCH
CLEARANCE FOR 2.4 X 1.0 (.094 X .039)
MOUNTING LUG. (2)HOLES. .445±.002
11.30±0.05
MOUNTING SURFACE
REF.
Ø1.4 MIN.
Ø15.9
MOUNTING HOLE DETAIL
(3) HOLES
123
"A"±
7.95±0.05
CLEARANCE FOR BUSHING.
CLEARANCE FOR 2.4 X 1.0(.094 X .039)
LOCATING LUG. (2)HOLES.
.313±.002 .313±.002
7.95±0.05
WIPER
13
2
CLOCKWISE
CIRCUIT
CCW CW
RECOMMENDED PCB LAYOUT
9.53
.375
.626
.016
0.4
L±0.8
.031
3/8-32UNEF-2A
MOUNTING SURFACE
2.39
.094
7.95
.313
7.95
.313
17.00
.669 .162
4.09
.055
275X Metal Shaft, Bushing Mount, Printed Circuit “X” Type Terminals
15.9
.626
12.5
4.5
.177
.492
.197±.002
5.00±0.05
.197±.002
5.00±0.05
5 - 9 © 2010 CTS Corporation. All rights reserved. Information subject to change. 08/06/10
CTS Electromonponents www.ctscorp.com
123
CENTER LINES
OF CONTROL
Ø15.9
.626
9.53
.375
L±0.8
.031
MOUNTING SURFACE
3/8-32UNEF-2A
11.2± 0.4
.441± .16
2.39
.094
7.95
.313
7.95
.313
12.29
.484
15.9
.626
WIPER
13
2
CLOCKWISE
CIRCUIT
CCW CW
Ø1.4 MIN.
(3) HOLES
.172±.002
4.37±0.05
.484
12.29
.055
.172±.002
4.37±0.05
7.95±0.05
CLEARANCE FOR BUSHING.
CLEARANCE FOR 2.4 X 1.0(.094 X .039)
LOCATING LUG. (2)HOLES.
.313±.002 .313±.002
7.95±0.05
270V Metal Shaft, Bushing Mount, Printed Circuit “V” Type Terminals
DIMENSION: mm
INCH
RECOMMENDED PCB LAYOUT
MOUNTING HOLE DETAIL
.016
0.4
"A"±
DIMENSION: mm
INCH
7.95±0.05
CLEARANCE FOR BUSHING.
CLEARANCE FOR 2.4 X 1.0(.094 X .039)
LOCATING LUG. (2)HOLES.
7.95
15.9
2.39
11.13
13.1 MAX.
9.53
Ø15.9
"A"±0.4
L±0.8
MTG. SURFACE
7.95
.375 .031
.016
.626
.313
.438
.516
.626
.094
.313
.313±.002 .313±.002
7.95±0.05
270T Metal Shaft, Bushing Mount, Solder Lug “T” Type Terminals
DIMENSION: mm
inch
WIPER
13
2
CLOCKWISE
CIRCUIT
CCW CW
1 2 3
MOUNTING HOLE DETAIL
3/8-32UNEF-2A
6 - 9 © 2010 CTS Corporation. All rights reserved. Information subject to change. 08/06/10
CTS Electromonponents www.ctscorp.com
DIMENSION: mm
INCH
270T-2 Dual Section, Metal Shaft, Bushing Mount, Solder Lug “T” Type Terminals
.313
CLEARANCE FOR
CLEARANCE FOR 2.39/.094 x 1.0/.040
LOCATING LUG. (2)HOLES.
7.95
BUSHING
MTG. SURFACE
18.64
11.13
7.95
7.95
.734
L± 0.8
.031
.016
0.40
A±
.313
7.95
.313
.313
.438
2.39
.094
7.95
.313
13.1
.516
15.9
.626
MAX.
3
2
1
WIPER
13
2
CLOCKWISE
CIRCUIT
CCW CW
MOUNTING HOLE DETAIL
3/8-32UNEF-2A
DIMENSION: mm
INCH
270X-057X Metal Shaft, Bushing Mount, Printed Circuit “X” Type Terminals,
Rotary 057 Switch
.313
CLEARANCE FOR
CLEARANCE FOR 2.39/.094 x 1.0/.040
LOCATING LUG. (2)HOLES.
7.95
BUSHING
MTG. SURFACE
9.53
11.13
7.95
7.95
Ø1.4 MIN 5HL'S.
MTG. SURFACE
.375
3.81
.150
16.6
.652
L± 0.80
.031
.016
0.40
A±
.313
7.95
.313
.313
.438
2.39
.094
7.95
.313
5.72
.225
.161
4.09
4.37
.172
4.37
.172
4.50
.177
15.09
.594
11.15
.439
3
2
1
WIPER
13
2
CLOCKWISE
CIRCUIT
CCW CW
7 - 9 © 2010 CTS Corporation. All rights reserved. Information subject to change. 08/06/10
CTS Electrocomponents www.ctscorp.com
RP
"DEMI" SWITCH
CW
CCW
CIRCUIT
CLOCKWISE
S2S1
13
2WIPER
S2
3
2
1
S1
Ø15.9
MOUNTING HOLE DETAIL
7.95±0.05
CLEARANCE FOR BUSHING.
CLEARANCE FOR 2.4 X 1.0(.094 X .039)
LOCATING LUG. (2)HOLES.
.313±.002 .313±.002
7.95±0.05
18.7
.736
.626
L±0.8
.031
3/8-32UNEF-2A
MOUNTING SURFACE
7.95
.313
11.13
.438
15.9
.626
DIMENSION: mm
INCH
270T-DEMIT Metal Shaft, Bushing Mount, Solder Lug “T” Type Terminals,
DEMI Switch
.016
0.4
"A"±
MOUNTING HOLE DETAIL
3/8-32UNEF-2A
/
8 - 9 © 2010 CTS Corporation. All rights reserved. Information subject to change. 08/06/10
CTS Electrocomponents www.ctscorp.com
Y
Type
A .125” (3.18 mm)
.156” (3.96 mm)
R
Type Diameter
B .125” (3.18 mm)
.156” (3.96 mm)
F
XY
.250” (6.35 mm)
.250” (6.35 mm)
Type Diameter
C .125” (3.18 mm)
.156” (3.96 mm)
S
X
.047” (1.19 mm)
Y
.039” (1.00 mm)
.039” (1.00 mm)
X
Y
Dia.
Diameter
G .187” (4.75 mm)
.236” (6.00 mm)
X
.250” (6.35 mm)
P
Dia.
H.187” (4.75 mm)
.236” (6.00 mm)
L .472” (12.0mm)
.250” (6.35 mm)
D.250” (6.35 mm)
.187” (4.75 mm)
V*
.375” (9.52 mm)
.313” (7.95 mm)
.236” (6.00 mm)
W** .472” (12.0 mm)
Z
Y
X
Type Diameter
.236” (6.00 mm)
N
X
.342” (8.70 mm)
Y
.039” (1.00 mm)
Z
18 Teeth
X
.109” (2.77 mm)
.109” (2.77 mm)
.156” (3.96 mm)
.156” (3.96 mm)
.156” (3.96 mm)
.177” (4.50 mm)
.177” (4.50 mm)
.187” (4.75 mm)
J.039” (1.00 mm)
.236” (6.00 mm)
M.039” (1.00 mm)
.250” (6.35 mm)
E.039” (1.00 mm)
.250” (6.35 mm)
T.279” (7.10 mm) .062” (1.57 mm) 24 Teeth
Shaft Diameter and Trim
.047” (1.19 mm)
.047” (1.19 mm)
.047” (1.19 mm)
.047” (1.19 mm)
KNURLED & SLOTTED
SLOTTED
FLATTED
ROUND
*Molded Shaft, FMS .875” (22.2 mm), not available with switch
**Molded Shaft, FMS .984” (25.0 mm), with rotary switch only
*Molded Shaft, FMS .500” (12.7 mm), not available with switch
(Metal Shaft)
Type Diameter
.236” (6.00 mm)
K**
X
.200” (5.08 mm)
Y
.046” (1.17 mm)
Z
18 Teeth
.187” (4.75 mm)
U* .062” (1.57 mm) .046” (1.17 mm) 18 Teeth
**Molded Shaft, FMS .500” (12.7 mm), with rotary switch only
Z
Y
X
KNURLED & SLOTTED
(Molded Shaft)
SHAFT LENGTH “L”
METAL SHAFTS
EXAMPLES
20 – .625"
24 – .750"
28 – .875"
32 – 1.000"
TERMINAL STYLE
T– SOLDER LUG
X–PC
U– FORMED
TO FRONT
V– FORMED
TO REAR
* Sfrvjsfe!for 275 Tfsjft
Ordering Information
270/275 T 2 20 R 103 B 1 A 1
RESIST TOL
A– ±10%
B– ±20%
C– ±30%
SWITCH TYPE
A– NONE
B– SPST ROTARY
SHAFT DIAMETER AND TRIM
A– .125" DIA. ROUND
B– .125" DIA. FLATTED
C– .125" DIA. SLOTTED
R– .156" DIA. ROUND
F– .156" DIA. FLATTED
S– .156" DIA. SLOTTED
G– .187" DIA. ROUND
H– .187" DIA. FLATTED
J– .187" DIA. SLOTTED
X– .236" DIA. ROUND
L– .236" DIA. FLATTED
M– .236" DIA. SLOTTED
N– .236" DIA. SLOTTED & KUNRLED
P– .250" DIA. ROUND
D– .250" DIA. FLATTED
E– .250" DIA. SLOTTED
T– .250" DIA. SLOTTED & KUNRLED
TAPER
1– LINEAR
2– 10% AUD
3– 10% CCW
AUD
SPECIALS
1– LEFT LOCATING LUG
2– 50% DETENT WITH LEFT
LOCATING LUG
4– RIGHT LOCATING LUG
5– NO LOCATING LUG
RESISTANCE CODE
EXAMPLES
CODE RESISTANCE
501 500 OHMS
102 1K
252 2.5K
502 5K
103 10K
253 25K
503 50K
104 100K
*
*
C– DEMI
MOMEMTARY
D– DEMI
PUSH-PULL
9 - 9 © 2010 CTS Corporation. All rights reserved. Information subject to change. 08/06/10
CTS Electrocomponents www.ctscorp.com
3– 50% DETENT WITH RIGHT
LOCATING LUG
MOUNTING STYLE “A”
BRASS BUSHING MOUNT
LENGTH EXAMPLES
2– .250"
3– .375"
8– 1.000"
1– TWIST TAB
3/8" – 32UNEF-2A
LENGTH INCREMENT: 1/32”
TWIST TAB MOUNT
BRACKET MOUNT
0– BRACKET
METAL SHAFT
Consult CTS for custom or not listed features including shaft, bushing, longer life cycles, solderable cover, anti-static design, etc.
MOLDED SHAFT
MOLDED SHAFT
Note :
16 – .500"
(shaft trim “U” & “K” only)
LENGTH INCREMENT: 1/32”
16 – .500"
*U – .187" DIA. SLOTTED & KUNRLED
(.500” shaft length only)
*V – .187" DIA. FLATTED (.875” shaft length only)
**W
– .236" DIA. FLATTED
32 – .984" (shaft trim “W” only)
28 – .875" (shaft trim “V” only)
(.984” shaft length only)
* Molded shaft not available with swtich
** Molded shaft with rotary switch only
**K – .236" DIA. SLOTTED & KUNRLED
(.500” shaft length only)
