VAR (Vishay Audio Resistor)

with TCR of ± 0.2 ppm/°C, Tolerance to ± 0.01 %

and Noise < - 40 dB

www.vishay.com

For any questions, contact: foil@vishay.com

Document Number: 63140

2

Revision: 12-Feb-08

FIGURE 2 - STANDARD DIMENSIONS

This product is fragile

and may be damaged

if mishandled.

Vishay assumes no

responsibility for

damage caused by

improper handling.

TABLE 2 - SPECIFICATIONS

RESISTANCE RANGE

(

Ω)

MAXIMUM

WORKING

VOLTAGE

AMBIENT

POWER RATING

DIMENSIONS

at

+ 70 °C

at

+ 125 °C

INCHES

mm

10 to 100K

200

0.4 W

0.2 W

W: 0.080 max.

L: 0.250 max.

H: 0.310 max.

LL: 1.000 ± 0.125

LS: 0.150 ± 0.005

W: 2.03 max.

L: 6.35 max.

H: 7.87 max.

LL: 25.4 ± 3.18

LS: 3.81 ± 0.13

Lead Material #22 AWG

Round Solder Coated Copper

W

L

LS

H

LL

Soldered PCB

FIGURE 3 - POWER DERATING CURVE

200 %

175 %

150 %

125 %

100 %

75 %

50 %

25 %

0

- 75

- 50

- 25

0

+ 25

+ 50

+ 75 + 100 + 125 + 150 + 175 + 200

Ambient Temperature (°C)

- 55 °C

+ 70 °C

Double Rated Power

Rated Power

FIGURE 4 - TRIMMING TO VALUES

(Conceptual Illustration)

Mutual Inductance

Reduction due

to Opposing

Current in

Adjacent Lines

Current Path

Before Trimming

Note: Foil shown in black, etched spaces in white

Interloop Capacitance

Reduction in Series

Trimming Process

Removes this Material

from Shorting Strip Area

Changing Current Path

and Increasing

Resistance

Current Path

After Trimming