Document Number: 51016

For technical questions, contact: sfer@vishay.com

www.vishay.com

Revision: 24-Jan-07

See also: Application notes

43

T73

1/4" Square Single-Turn

Cermet Sealed Trimmers

Vishay Sfernice

ELECTRICAL SPECIFICATIONS

Resistive Element

Cermet

Electrical Travel

240° nominal

Resistance Range

10

Ω to 2 MΩ

Standard Series

1 - 2 - 5

Tolerance Standard

± 10 %

Power Rating

Linear

0.5 W at 70 °C

Logarithmic

not applicable

Temperature Coefficient

± 100 ppm/°C

Limiting Element Voltage

300 V

Contact Resistance Variation

1 % or 3

Ω max. whichever is greater

Absolute Minimum Resistance

1 % or 2

Ω max. whichever is greater

Adjustability

± 0.05 % voltage

± 0.15 % resistance

Resolution

infinite

Insulation Resistance (500 V DC)

Ω minimum

Dielectric Strength

900 Vac sea level

350 Vac 80 000 feet

MECHANICAL SPECIFICATIONS

Mechanical Travel

270°

Operating Torque (max. Ncm)

2.1

End Stop Torque (max. Ncm)

4.9

Unit Weight (max. g)

0.6

ENVIRONMENTAL SPECIFICATIONS

Temperature Range

- 55 °C to + 125 °C

Climatic Category

55/100/56

Seal Test

85 °C Fluorinert**

Flammability

UL 94-VO

** Fluorinert is a registered trademark of 3M Co.

POWER RATING CHART

0

20

40

100

125

140

70

60

0.25

0

0.50

AMBIENT TEMPERATURE IN DEGREES CELSIUS

PERFORMANCE

TESTS

CONDITIONS

TYPICAL VALUES AND DRIFTS

Load Life

1000 hours - 0.5 W at + 70 °C

ΔR

R

≤ 3 %

CRV

< 3

Ω or 3 %

whichever is

greater

Shock

100 g

ΔR

R

< ± 1 %

ΔV

V

< ± 1 %

Vibration

30 g

ΔR

R

< ± 1 %

ΔV

V

≤ ± 1 %

Humidity

Mil-STD202 method 103 - 96 hours

ΔR

R

< ± 2 %

i.R. 10 M

Ω

Rotational Life

200 cycles

ΔR

R

< ± 4 %

CRV

< 3

Ω or 3 %

whichever is

greater