148, 149

1/2" (12.7 mm) Conductive Plastic and Cermet

Potentiometers

Vishay Spectrol

Document Number: 57040

For technical questions, contact: sfer@vishay.com

www.vishay.com

Revision: 31-Jul-06

See also: Application notes

103

ELECTRICAL SPECIFICATIONS

PARAMETER

148

149

Resistance Range

1 k

Ω to 1 MΩ linear

500

Ω to 500 kΩ non-linear

100

Ω to 2.0 MΩ linear

250

Ω to 1 MΩ non-linear

Resistance Tolerance

Linear

Non-Linear

Standard ± 10 % to 500K, ± 20 % over 500K

Standard ± 10 % to 100K, ± 20 % over 100K

Taper Tolerance

20 % of the Nominal R at 50 % mechanical rotation

Linearity (Typical)

± 5 % Independent

End Resistance

4

Ω maximum each end

Power Rating

0.5 watts at 70 °C

0 watts at 120 °C

1 watt at 70 °C

0 watt at 150 °C

Non-Linear or PC mount, derate 50 %

Effective Rotation

270° ± 10° without rotary switch

240° ± 10° with rotary switch

Contact Resistance Variation

1.5 % of total resistance

3 % of total resistance

Maximum Continuous Working Voltage

350 VAC across end terminals, but within power rating

Dielectric Withstanding Voltage

Sea Level - 750 VAC

70 000 feet - 350 VAC

Switch Specifications

Rotary (AL) switch: S.P.S.T and S.P.D.T 125 mA, 28 VDC

CCW or CW, rotational life 10 000 cycles (rated load)

MECHANICAL SPECIFICATIONS

Mechanical Rotation

300° ± 5°

Torque

Operating

Single section 0.2 to 3.0 oz - in Dual or triple section 0.3 to 4.5 oz - in

Center Detent

0.6 to 3.0 oz - in

Stop Strength

3 in - lbs min

Weight (approx)

Single

0.19 oz

Dual

0.27 oz

Triple

0.35 oz

ENVIRONMENTAL SPECIFICATIONS

148

149

Operating Temperature

- 40 °C to + 120 °C

- 40 °C to + 150 °C

Storage Temperature

- 55 °C to + 120 °C

- 55 °C to + 150 °C

Temperature Cycling (5 Cycles)

- 40 °C to + 120 °C (4 %

ΔRt)

- 40 °C to + 150 °C (3 %

ΔRt)

Load Life (1000 hrs. Rated Load at 70 °C)

10 %

ΔRt

5 %

ΔRt

Rotational Load Life

50 000 cycles

25 000 cycles

TCR

± 1000 ppm/°C

± 150 ppm/°C