Model 140, 142
Vishay Spectrol
1/2” (12.7mm) Single - Turn Wirewound
Precision Potentiometer
FEATURES
• 50Ω to 20KΩ
• Bushing or Servo
Model 140
Bushing Mount
PARAMETER
Total Resistance
Tolerance
Absolute Minimum Resistance
Linearity (Independent)
Noise
Power Rating
Insulation Resistance
Dielectric Strength
Rotation
End Voltage
140
320°
±
5°
STANDARD
50Ω to 20KΩ
±
5%
Linearity x Total Resistance or
0.5Ω, whichever is greater
±
1.0%
100Ω ENR
2 watts at 40°C ambient derating linearly to zero at 125°C
1,000MΩ min. 0.500VDC
1.000V
RMS
, 60 Hz
142
350° + 0° - 4°
Model 142
Servo Mount
ELECTRICAL SPECIFICATIONS
Linearity x total applied voltage for total resistance above 20Ω;
2.0% of total applied voltage for 20Ω and below
MATERIAL SPECIFICATIONS
Shaft
Housing
Rear Lid
Terminals
Mounting Hardware
Lockwasher Internal Tooth:
Panel nut:
Stainless steel, non magnetic
non-passivated
Aluminum, anodized
Molded glass filled
thermoset plastic
Brass, gold plated
(Model 140 only)
Steel, nickel plated.
Brass, nickel plated
ENVIRONMENTAL SPECIFICATIONS
Vibration
Shock
Salt Spray
Rotational Life
Load Life
Temperature Range
20G thru 2000 Hz
50g
96 Hours
500,000
Shaft Revolutions
900 Hours
- 55°C to + 125°C (operating)
ORDERING INFORMATION
This part number consists of four groups of digits. The first group is the Spectrol model number. The second digit describes the mechani-
cal options available. The third digit describes the other optional features which can be supplied. The fourth group is the standard EIA
resistance code.
Example:
140 - 0 - 0 - 203
140
0
0
203
MODEL
MECHANICAL OPTIONS
OTHER OPTIONAL
RESISTANCE CODE
FEATURES
Bushing 140
0.
Stops, Slotted Shaft (std)
0.
Standard Torque
2
= First Significant figure
1.
Plain Shaft
1.
Center Tap (10K max. Rt)
0
= Second significant figure
2.
Shaft Lock
2.
High Torque
3
= Number of zeros following
3.
Continuous Rotation
3.
Sealed Construction
4.
Combination 1 & 2
4.
Combination 1 & 2
5.
Combination 1 & 3
5.
Combination 1 & 3
6.
Combination 2 & 3
6.
Combination 2 & 3
7.
Combination 1, 2, & 3
7.
Combination 1, 2, & 3
Servo 142
0.
Continuous Rotation,
Plain Shaft (std.)
0.
Standard Torque
1.
Center Tap (10K max. Rt)
Same as above
Example: Part number 140-0-0-203 describes bushing mount 140 with stops, slotted shaft, standard torque and resistance of 20KΩ
Document Number: 57039
Revision 16-Jul-03
For technical questions, contact sfer@vishay.com
www.vishay.com
55
Model 140, 142
Vishay Spectrol
1/2” (12.7mm) Single - Turn Wirewound
Precision Potentiometer
+ 0.0000
- 0.0003
Ø 0.1248
(3.17)
Ø 0.500
(12.70)
0.187
(4.75)
DIMENSIONS
in inches (millimeters)
0.062 WIDE
+ 0.000 IMPERFECT
THR’O AREA
- 0.003
0.133 R
(3.38)
Ø 0.250 MTG
(6.10)
1/4 - 32 UNEF - 2A
THREAD
0.500
(12.70)
120
°
TYP
CW
0.152
(3.86)
0.056
(1.42)
0.305
(7.75)
±
0.015 0.031
(0.79)
0.312
(7.92)
±
0.010
0.700 (17.78)
MTG FACE
INTEGRAL SHAFT LOCK
0.031
(0.79)
Ø 0.062
(1.57)
0.218
BUSHING MOUNT
Ø 0.375
(9.52)
0.062
(1.57)
0.152
(3.86)
0.062 (1.57)
0.625
(15.88)
Ø 0.500
(12.70)
±
0.0005
+ 0.010
0.500
(12.70)
0.062 (1.57)
MTG FACE
Ø 0.4370 MTG
+ 0.000
(11.10)
- 0.0003
Ø 0.1248
(3.17)
150
°
SERVO MOUNT
60
°
CENTER TAP AVAILABLE AS
SPEC STANDARD FEATURE
TOLERANCES: UNLESS
OTHERWISE NOTED,
DECIMALS
±
0.005, ANGLES
±
2
°
MECHANICAL SPECIFICATIONS
PARAMETER
Rotation
Bearing Type
Torque (Maximums)
Starting
Running
Traversing
Dead Zone
Weight
Stop Strength
Runouts (Maximum)
Shaft (TIR)
Pilot Dia (TIR)
Lateral (TIR)
Shaft End Play
Shaft Radial Play
140
330°
±
5°
SLEEVE BEARING
142
360° continuous
BALL BEARING
0.2 oz - in (14.40gm - cm)
0.075 oz - in (5.40gm - cm)
0.2 oz - in (14.40gm - cm)
0.05 oz - in (3.60gm - cm)
–
–
Not applicable
0.20 oz - in (14.40gm - cm)
0.1 oz. maximum (2.84gm)
0.3 oz (8.50gm) maximum
5 in - lbs (5.76 kgm - cm) static (140 only)
140
142
0.002 in (0.05cm)
0.002 in (0.05cm)
0.002 in (0.05cm)
0.002 in (0.05cm)
0.003 in (0.08cm)
0.002 in (0.05cm)
0.006 in (0.15cm)
0.004 in (0.10cm)
0.003 in (0.08cm)
0.002 in (0.05cm)
POWER RATING CHART
RATED POWER IN (WATTS)
RESISTANCE ELEMENT DATA
STD
RESISTANCE RESO-
VALUES
LUTION
(
Ω
)
(%)
OHMS
PER
TURN
0.271
0.431
0.722
1.56
2.55
3.94
8.50
14.7
21.0
MAXIMUM
CURRENT
AT 40
°
C
AMBIENT
(mA)
200.0
141.0
100.0
63.2
44.7
31.6
20.0
14.1
10.0
MAXIMUM
VOLTAGE
ACROSS
COIL
(V)
10.0
14.1
20.0
31.6
44.7
63.2
100.0
141.0
200.0
WIRE
TEMP.
COEF.
(ppm/
°
C)
20
20
20
20
20
20
20
20
20
2
1
50
100
200
500
1K
2K
5K
10K
20K
0.542
0.431
0.361
0.312
0.255
0.197
0.170
0.147
0.105
0
0
20
AMBIENT TEMPERATURE IN (
°
C)
40
60
80 100 120 140 160
MARKING
Unit
Identification
Units shall be marked with manufacturer’s
name, model number, resistance value &
tolerance, circuit diagram, terminal
identification, linearity & date code
www.vishay.com
56
For technical questions, contact sfer@vishay.com
Document Number: 57039
Revision 16-Jul-03
Legal Disclaimer Notice
Vishay
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
Document Number: 91000
Revision: 08-Apr-05
www.vishay.com
1
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