300 Series

Vishay Foil Resistors

4-Terminal Power Current Sensing Resistors with

TCR as low as ± 1 ppm/°C and Tolerance ± 0.1 %

www.vishay.com

For any questions, contact: foil@vishay.com

Document Number: 63018

2

Revision: 26-Jun-07

FIGURE 2 - TRIMMING TO VALUES

(Conceptual Illustration)

Mutual Inductance

Reduction due

to Change in

Current Direction

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

FIGURE 3 - TYPICAL TCR CURVE

(For more details, see table 2)

- 50

- 25

0

+ 20

+ 50

+ 75

+ 100

+ 125

- 55

+ 150

+ 100

+ 50

0

- 50

- 100

- 150

- 200

R

(ppm)

Ambient Temperature (°C)

± 2 ppm/°C (+ 25 °C reference)

FIGURE 4 - DIMENSIONS in inches (millimeters) AND SCHEMATIC

Model VCS301 and VCS331 (E Lead Rectangular)

Model VCS302 and VCS332 (Round Leads)

MODEL

± 0.008

(± 0.20)

± 0.008

(± 0.20)

MAXIMUM

± 0.008

(± 0.20)

MAXIMUM

MAXIMUM

LL

MINIMUM

LS

± 0.020

(± 0.51)

LT

± 0.020

(± 0.51)

NOMINAL

NOMINAL

P

NOMINAL

T

NO

VCS301

VCS331

1.340

(34.04)

0.701

(17.81)

1.063

(27.00)

0.197

(5.00)

0.210

(5.33)

0.087

(2.21)

0.216

(5.49)

0.689

(17.50)

1.083

(27.51)

0.138

(3.51)

0.040

(1.02)

0.040

(1.02)

0.016

(0.41)

VCS302

VCS332

1.340

(34.04)

0.701

(17.81)

1.024

(26.01)

0.197

(5.00)

0.210

(5.33)

0.087

(2.21)

1.000

(25.40)

0.689

(17.50)

1.083

(27.51)

0.138

(3.51)

0.040

(1.02)

0.032

(0.81)

-

VISHAY

VCS331

0R3000 1%

B9825

VISHAY

VCS332

8R2000 0.1%

B9825

D1

D2

L1

L2

H1

H2

W1

W2

LL

LS

LT

p

D1

D2

L1

L2

H1

H2

W1

W2

LL

LS

LT

p

T

I

1

E

1

I

2

E

2

I

V

I

R