Document Number: 63018

For any questions, contact: foil@vishay.com

www.vishay.com

Revision: 26-Jun-07

1

300 Series

Vishay Foil Resistors

4-Terminal Power Current Sensing Resistors with

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

Any value at any tolerance available within resistance range

resistors as low as 5 m

Ω with a temperature coefficient

down to 1 ppm/°C and unmatched long term stability. The

4 terminal current sensing resistors, when mounted on a

heat sink, can sustain 10 watts continuously without an

appreciable change in resistance (0.15 % maximum). The

typical 50 % power derating specification associated with

other technologies is not necessary. A choice of lead

configurations is available.

Our Application Engineering Department is available to

advise and make recommendations. For non-standard

technical requirements and special applications, please

contact us.

FEATURES

down to ± 1 ppm/°C Max. (see table 2)

• Tolerance: to ± 0.1 % (see table 1)

• Power Rating (heat-sinked): 10 W

• Load Life Stability: ± 0.05 % at 25 °C, 2000 hours at Rated

Power

• Resistance Range: 0.005 Ω to 500 Ω

• Electrostatic Discharge (ESD) above 25 000 V

• Non Inductive, Non Capacitive Design

• Rise Time: 1.0 ns without ringing

• Current Noise: < - 40 dB

• Thermal EMF: 0.05 µV/°C typical

• Voltage Coefficient: < 0.1 ppm/V

• Non Inductive: 0.08 µH

• Non Hot Spot Design

• Terminal Finishes available: Lead (Pb)-free

Tin/Lead Alloy

• Any value available within resistance range (e.g. 1K2345)

• Prototype samples available from 48 hours. For more

information, please contact foil@vishay.com

Engineering

Notes

1. Tighter tolerance is available - for more details contact Application Engineering

2. The lower of the two limitations (Power or Current) is decisive

3. Heatsink - Aluminum (6 inches length x 4 inches width x 2 inches height x 0.04 inches thick)

* Pb containing materials are not RoHS compliant, exemptions may apply

Available

Pb-free

RoHS*

COMPLIANT

TABLE 1 - CHARACTERISTICS

MODEL NUMBER

RESISTANCE RANGE

at + 25 °C

VCS301, VCS302

0.005

Ω < R < 0.1 Ω

± 1 %

10 W on

or

3 W in Free Air

15 A

0.1

Ω ≤ R < 0.25 Ω

± 0.5 %

VCS331, VCS332

0.25

Ω < R < 500 Ω

± 0.1 %

5 A

TABLE 2 - TCR CHART (MAXIMUM)

(0 °C TO + 60 °C)

≥ 0.005 Ω

to

< 0.01

Ω

± 15 ppm/°C

≥ 0.01 Ω

to

< 0.05

Ω

± 10 ppm/°C

≥ 0.05 Ω

to

< 0.1

Ω

± 5 ppm/°C

≥ 0.1 Ω

to

< 1

Ω

± 3 ppm/°C

≥ 1 Ω

to

< 10

Ω

± 2 ppm/°C

≥ 10 Ω

to

< 500

Ω

± 1 ppm/°C

FIGURE 1 - POWER DERATING CURVE

(Further Derating Not Necessary)

+ 100

+ 75

+ 50

+ 25

0

Ambient Temperature °C

- 55 °C

+ 25 °C

- 50

+ 50

0

+ 100

+ 150

+ 200