www.vishay.com
55
Model 140, 142
Vishay Spectrol
Document Number: 57039
Revision 16-Jul-03 For technical questions, contact sfer@vishay.com
FEATURES
•50Ω to 20KΩ
• Bushing or Servo
1/2” (12.7mm) Single - Turn Wirewound
Precision Potentiometer
PARAMETER
STANDARD
Total Resistance 50Ω to 20KΩ
Tolerance ± 5%
Absolute Minimum Resistance Linearity x Total Resistance or
0.5Ω, whichever is greater
Linearity (Independent) ± 1.0%
Noise 100Ω ENR
Power Rating 2 watts at 40°C ambient derating linearly to zero at 125°C
Insulation Resistance 1,000MΩ min. 0.500VDC
Dielectric Strength 1.000VRMS, 60 Hz
Rotation 140 142
320° ± 5°350° + 0° - 4°
End Voltage Linearity x total applied voltage for total resistance above 20Ω;
2.0% of total applied voltage for 20Ω and below
ELECTRICAL SPECIFICATIONS
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 (Model 140 only)
Lockwasher Internal Tooth: Steel, nickel plated.
Panel nut: Brass, nickel plated
ENVIRONMENTAL SPECIFICATIONS
Vibration 20G thru 2000 Hz
Shock 50g
Salt Spray 96 Hours
Rotational Life 500,000
Shaft Revolutions
Load Life 900 Hours
Temperature Range - 55°C to + 125°C (operating)
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, 0. Standard Torque Same as above
Plain Shaft (std.) 1. Center Tap (10K max. Rt)
Example: Part number 140-0-0-203 describes bushing mount 140 with stops, slotted shaft, standard torque and resistance of 20KΩ
ORDERING INFORMATION
Model 140
Bushing Mount
Model 142
Servo Mount
Document Number: 57039
Revision 16-Jul-03
www.vishay.com
56
Model 140, 142
Vishay Spectrol
For technical questions, contact sfer@vishay.com
DIMENSIONS in inches (millimeters)
1/2” (12.7mm) Single - Turn Wirewound
Precision Potentiometer
POWER RATING CHART
Unit Units shall be marked with manufacturer’s
Identification name, model number, resistance value &
tolerance, circuit diagram, terminal
identification, linearity & date code
MARKING
MAXIMUM MAXIMUM
STD CURRENT VOLTAGE WIRE
RESISTANCE RESO- OHMS AT 40
°
C ACROSS TEMP.
VALUES LUTION PER AMBIENT COIL COEF.
(
Ω
) (%) TURN (mA)(V) (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
RESISTANCE ELEMENT DATA
MECHANICAL SPECIFICATIONS
PARAMETER
Rotation 140 142
330° ± 5°360° continuous
Bearing Type SLEEVE BEARING BALL BEARING
Torque (Maximums)
Starting 0.2 oz - in (14.40gm - cm) 0.075 oz - in (5.40gm - cm)
Running 0.2 oz - in (14.40gm - cm) 0.05 oz - in (3.60gm - cm)
Traversing – –
Dead Zone Not applicable 0.20 oz - in (14.40gm - cm)
Weight 0.1 oz. maximum (2.84gm) 0.3 oz (8.50gm) maximum
Stop Strength 5 in - lbs (5.76 kgm - cm) static (140 only)
Runouts (Maximum) 140 142
Shaft (TIR) 0.002 in (0.05cm) 0.002 in (0.05cm)
Pilot Dia (TIR) 0.002 in (0.05cm) 0.002 in (0.05cm)
Lateral (TIR) 0.003 in (0.08cm) 0.002 in (0.05cm)
Shaft End Play 0.006 in (0.15cm) 0.004 in (0.10cm)
Shaft Radial Play 0.003 in (0.08cm) 0.002 in (0.05cm)
BUSHING MOUNT
150°
60°
CENTER TAP AVAILABLE AS
SPEC STANDARD FEATURE
Ø 0.4370 MTG
(11.10)
± 0.0005
Ø 0.1248
(3.17)
+ 0.000
- 0.0003
Ø 0.500
(12.70)
0.500
(12.70)
+ 0.010
0.062 (1.57)
MTG FACE
0.625
(15.88)
0.062 (1.57)
0.062
(1.57)
0.152
(3.86)
SERVO MOUNT
TOLERANCES: UNLESS
OTHERWISE NOTED,
DECIMALS ± 0.005, ANGLES ± 2°
0 20 40 60 80 100 120 140 160
AMBIENT TEMPERATURE IN (°C)
0
1
2
RATED POWER IN (WATTS)
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
Ø 0.375
(9.52)
0.312
(7.92)
± 0.015
0.062 WIDE
IMPERFECT
THR’O AREA
Legal Disclaimer Notice
Vishay
Document Number: 91000 www.vishay.com
Revision: 08-Apr-05 1
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.
