Model 157
www.vishay.com
Vishay Spectrol
Revision: 06-Nov-15
1
Document Number: 57042
For technical questions, contact: sferprecisionpot@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
7
/
8
" (22.2 mm) Precision Industrial Potentiometer,
Bushing And Servo Mount Versions, Conductive Plastic
FEATURES
• High quality
• Rugged one piece metal housing
• Long rotational life
• Wide operating temperature range
• Linearities down to ± 0.25 % special
• Optional sealed construction (bushing mount only)
• Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
QUICK REFERENCE DATA
Sensor type ROTATIONAL, conductive plastic
Output type Output by turrets
Market appliance Industrial
Dimensions
7
/
8
" (22.2 mm)
ELECTRICAL SPECIFICATIONS
PARAMETER MIL-PRF-39023 TEST PROCEDURES APPLY
Resistance 1 k to 100 k
Resistance Tolerance
Special to
± 20 %
± 10 %
Linearity
Special to
± 2.0 %
± 0.25 %
Temperature Coefficient of Resistance ± 600 ppm/°C
Power Rating
Derated to
1.0 W at 40 °C ambient
0 W at 125 °C
Electrical Angle 340° ± 4°
End Voltage 0.5 % maximum
Dielectric Withstanding 1000 V
RMS
, 60 Hz
Insulation Resistance 100 M minimum, 500 V
DC
Output Smoothness 0.1 %
MECHANICAL SPECIFICATIONS
PARAMETER
Weight 0.5 oz. maximum (14 g)
Rotation 360° (continuous)
Mount
Bearing Type
BUSHING
Sleeve bearing
SERVO
Ball bearing
Operating Torque
Starting
Running
0.30 oz. - in (21.6 g - cm)
0.25 oz. - in (18 g - cm)
0.25 oz. - in (18 g - cm)
0.15 oz. - in (10.8 g - cm)
Mechanical Tolerance (in/mm) (maximum)
Shaft Runout (TIR) 0.002" (0.05 mm) 0.002" (0.05 mm)
Pilot Dia Runout (TIR) - 0.002" (0.05 mm)
Lateral Runout (TIR) 0.005" (0.13 mm) 0.002" (0.05 mm)
Shaft End Play 0.006" (0.15 mm) 0.005" (0.13 mm)
Shaft Radial Play 0.003" (0.08 mm) 0.002" (0.05 mm)
