200 Series

Vishay Foil Resistors

Precision Current Sensing Resistors

with TCR of 5 ppm/°C and values down to 5 m

Ω

www.vishay.com

For any questions, contact: foil@vishay.com

Document Number: 63017

2

Revision: 16-Jul-07

Note

1.

ΔR's plus additional 0.0005 Ω for measurement error

TABLE 2 - VISHAY VCS201, VCS202, VCS232 PERFORMANCE

TEST OR CONDITION

Maximum Ambient Temperature at Rated Power

+ 25 °C

Maximum Ambient Temperature at Zero Power

+ 150 °C

Thermal Shock

± 0.1 %

Short Time Overload

± 0.1 %

Resistance to Solder Heat

± 0.05 %

Terminal Strength

± 0.05 %

High Temperature Exposure

± 0.1 %

Moisture Resistance

± 0.1 %

Low Temperature Storage

± 0.05 %

Shock (Specified Pulse)

± 0.1 %

Vibration (High Frequency)

± 0.1 %

Life (Rated Power, + 25 °C, 2000 hours)

± 0.5 %

Thermal EMF (Lead to Lead)

0.2 µV/°C Maximum (E terminals)

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 - POWER DERATING CURVE

+ 100

+ 75

+ 50

+ 25

0

- 50

0

+ 50

+ 100

+ 150

+ 200

Ambient Temperature (

°C)

- 55 °C

+ 25 °C

(Further Derating Not Necessary)