Model 140, 142
Vishay Spectrol
1/2” (12.7mm) Single - Turn Wirewound
Precision Potentiometer
FEATURES
• 50Ω to 20KΩ
• Bushing or Servo
Model 142
Servo Mount
Model 140
Bushing Mount
ELECTRICAL SPECIFICATIONS
PARAMETER
STANDARD
Total Resistance
50Ω to 20KΩ
Tolerance
± 5%
Absolute Minimum Resistance
Linearity x Total Resistance or
0.5Ω, whichever is greater
Linearity (Independent)
Noise
± 1.0%
100Ω ENR
Power Rating
2 watts at 40°C ambient derating linearly to zero at 125°C
1,000MΩ min. 0.500VDC
Insulation Resistance
Dielectric Strength
Rotation
1.000VRMS, 60 Hz
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
MATERIAL SPECIFICATIONS
ENVIRONMENTAL SPECIFICATIONS
Shaft
Stainless steel, non magnetic
non-passivated
Vibration
20G thru 2000 Hz
50g
Shock
Housing
Rear Lid
Aluminum, anodized
Molded glass filled
thermoset plastic
Brass, gold plated
(Model 140 only)
Steel, nickel plated.
Brass, nickel plated
Salt Spray
Rotational Life
96 Hours
500,000
Terminals
Shaft Revolutions
900 Hours
Mounting Hardware
Lockwasher Internal Tooth:
Panel nut:
Load Life
Temperature Range
- 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)
1. Plain Shaft
2. Shaft Lock
0. Standard Torque
1. Center Tap (10K max. Rt)
2. High Torque
2 = First Significant figure
0 = Second significant figure
3 = Number of zeros following
3. Continuous Rotation
4. Combination 1 & 2
5. Combination 1 & 3
6. Combination 2 & 3
7. Combination 1, 2, & 3
3. Sealed Construction
4. Combination 1 & 2
5. Combination 1 & 3
6. Combination 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
Document Number: 57039
Revision 16-Jul-03
For technical questions, contact sfer@vishay.com
www.vishay.com
55