1/2" (12.7 mm) Single - Turn Wirewound
Bushing Mount Type Precision Potentiometer
Model 140
Vishay Spectrol
www.vishay.com For technical questions, contact: sfer@vishay.com Document Number: 57097
88 Revision: 28-Jun-07
FEATURES
•Ohmic value range: 50 Ω up to 20 kΩ
•Smallest size available: 12.7 mm
•Mechanical stops on request
•High torque and sealed versions available
RoHS
COMPLIANT
ELECTRICAL SPECIFICATIONS
PARAMETER
Total Resistance 50 Ω to 20 kΩ
To l e ra n c e ± 5 %
Absolute Minimum Resistance Linearity x total resistance or
0.5 Ω, whichever is greater
Linearity (Independent) ± 1.0 %
Noise 100 Ω ENR
Power Rating 2 W at 40 °C ambient derating linearly to zero at 125 °C
Insulation Resistance 1000 MΩ min. 500 VDC
Dielectric Strength 1000 VRMS, 60 Hz
Electrical Angle 320° ± 5°
End Voltage Linearity x total applied voltage for total resistance above 20 Ω;
2.0 % of total applied voltage for 20 Ω and below
MATERIAL SPECIFICATIONS
Shaft Stainless steel, non magnetic
non-passivated
Housing Aluminum, anodized
Rear Lid Molded glass filled
thermoset plastic
Terminals Brass, gold plated
Mounting Hardware
Lockwasher Internal Tooth:
Panel Nut:
Steel, nickel plated.
Brass, nickel plated
ENVIRONMENTAL SPECIFICATIONS
Vibration 20 G thru 2000 Hz
Shock 50 g
Salt Spray 96 h
Rotational Life 500 000
shaft revolutions
Load Life 900 h
Temperature Range - 55 °C to + 125 °C (operating)
ORDERING INFORMATION/DESCRIPTION
140B 0 0 20K BO10
MODEL MECHANICAL OPTIONS SPECIAL FEATURE OHMIC VALUE PACKAGING
0. Stops, slotted shaft (std)
1. Plain shaft
2. Shaft lock
3. Continuous rotation
4. Combination 1 and 2
5. Combination 1 and 3
6. Combination 2 and 3
7. Combination 1, 2 and 3
0. Standard torque
1. Center tap (10K max. Rt)
2. High torque
3. Sealed construction
4. Combination 1 and 2
5. Combination 1 and 3
6. Combination 2 and 3
7. Combination 1, 2 and 3
Box of 10 pieces
SAP PART NUMBERING GUIDELINES
140B 7 0 103 B10
MODEL MECHANICAL OPTION FEATURE OHMIC VALUE PACKAGING
From 0 to 7 From 0 to 7 103 = 10K Box of
10 pieces
Model 140
1/2" (12.7 mm) Single - Turn Wirewound
Bushing Mount Type Precision Potentiometer
Vishay Spectrol
Document Number: 57097 For technical questions, contact: sfer@vishay.com www.vishay.com
Revision: 28-Jun-07 89
DIMENSIONS in inches (millimeters)
MECHANICAL SPECIFICATIONS
PARAMETER
Rotation 330° ± 5°
Bearing Type
Torque (Maximums)
Starting
Running
Dead Zone
SLEEVE BEARING
0.2 oz. - in (14.40 g - cm)
0.2 oz. - in (14.40 g - cm)
Not applicable
Weight 0.1 oz. maximum (2.84 g)
Stop Strength 5 in - lbs (5.76 kg - cm) static
Runouts (Maximum)
Shaft (TIR)
Pilot Dia. (TIR)
Lateral (TIR)
Shaft End Play
Shaft Radial Play
0.002" (0.05 cm)
0.002" (0.05 cm)
0.003" (0.08 cm)
0.006" (0.15 cm)
0.003" (0.08 cm)
POWER RATING CHART
MARKING
Unit
Identification
Units shall be marked with manufacturer’s
name, model number, resistance value and
tolerance, circuit diagram, terminal
identification, linearity and data code.
0 20 40 60 80 100 120 140 160
AMBIENT TEMPERATURE IN °C
0
1
2
RATED POWER IN W
RESISTANCE ELEMENT DATA
STD
RESISTANCE
VALUES
(
Ω
)
RESO-
LUTION
(%)
OHMS
PER
TURN
MAXIMUM
CURRENT
AT 40 °C
AMBIENT
(mA)
MAXIMUM
VOLTAGE
ACROSS
COIL
(V)
WIRE
TEMP.
COEF.
(ppm/°C)
50 0.542 0.271 200.0 10.0 20
100 0.431 0.431 141.0 14.1 20
200 0.361 0.722 100.0 20.0 20
500 0.312 1.56 63.2 31.6 20
1K 0.255 2.55 44.7 44.7 20
2K 0.197 3.94 31.6 63.2 20
5K 0.170 8.50 20.0 100.0 20
10K 0.147 14.7 14.1 141.0 20
20K 0.105 21.0 10.0 200.0 20
150°
60°
CENTER TAP AVAILABLE AS
SPEC STANDARD FEATURE
CENTER TAP OPTIONSHAFT LOCK OPTION
TOLERANCES: UNLESS
OTHERWISE NOTED.
DECIMALS ± 0.005 ANGLES ± 2 °
0.218
120°
TYP.
0.133 R
(3.38)
+ 0.000
- 0.003
Ø 0.250 MTG. (6.10)
1/4 - 32
UNEF - 2A
THREAD
Ø 0.1248
(3.17)
+ 0.0000
- 0.0003
Ø 0.062
(1.57)
0.031
(0.79)
0.187
(4.75)
0.031
(0.79)
± 0.010
0.305
(7.75)
0.056
(1.42)
0.152
(3.86)
MTG. FACE
Ø 0.500
(12.70)
0.500
(12.70)
0.700 (17.78)
INTEGRAL SHAFT LOCK
CW
0.312
(7.92)
± 0.015
0.062 WIDE
IMPERFECT
THR’O AREA
Document Number: 91000 www.vishay.com
Revision: 11-Mar-11 1
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