VPR220, VPR221

Vishay Foil Resistors

Resistors in TO-220 Configuration with TCR of ± 2 ppm/°C,

Tolerance of to ± 0.01 % and Power Rating to 8 W

www.vishay.com

For any questions, contact: foil@vishay.com

Document Number: 63012

2

Revision: 05-Jul-07

Notes

1. Whichever is lower

2. Heat

sink

chassis

dimensions

and

requirements

per

MIL-R-39009/1B:

3. Inductance (L) due mainly to the leads

4. The resolution limit of existing test equipment (within the

measurement capability of the equipment, or "essentially zero")

5. µV/°C relates to EMF due to lead temperature difference

Surface mount versions of these products are available. See

datasheets for VPR220S, VPR 221S.

FIGURE 2 - TYPICAL TCR CURVE

TABLE 3 - SPECIFICATIONS

Load Life Stability at 2000 h

± 0.05 % max

ΔR under full rated

power at + 25 °C

Power Rating at + 25 °C

Further derating not necessary

Current Noise

< 0.010 µV (rms)/V of applied

voltage (- 40 dB)

High Frequency Operation

Rise time

1 ns without ringing

0.1 µH maximum: 0.03 µH typical

Capacitance (C)

1.0 pF maximum: 0.5 pF typical

< 0.1 ppm/V

Operating Temperature

Range

- 55 °C to + 150 °C

Maximum Working Voltage

300 V. Not to exceed power rating

0.15 µV/°C maximum (lead effect)

DIMENSION

INCHES

mm

L

6.00

152.4

W

4.00

101.6

H

2.00

50.8

T

0.04

1.0

- 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 3 - TRIMMING TO VALUES

(Conceptual Illustration)

FIGURE 4 - VPR220 DIMENSIONS in inches (millimeters)

FIGURE 5 - VPR221 DIMENSIONS in inches (millimeters)

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

0.400 ± 0.010

(10.16 ± 0.25)

VISHAY

VPR220

1K0 1 %

0101

0.245 ± 0.010

(6.22 ± 0.25)

0.141 ± 0.005 Dia

(3.58 ± 0.13)

0.540 ± 0.040

(13.72 ± 1.02)

0.030 ± 0.002

(0.76 ± 0.05)

0.200 ± 0.005

(5.08 ± 0.13)

0.115 ± 0.005

(2.92 ± 0.13)

0.050 ± 0.005

(1.27 ± 0.13)

0.150 ± 0.008

(3.81 ± 0.2)

0.615 Max

(15.62)

0.078 ± 0.005

(1.98 ± 0.13)

0.015 ± 0.002

(0.38 ± 0.05)

0.050 ± 0.005

(1.27 ± 0.13)

0.200 ± 0.030

(5.08 ± 0.76)

E

2

0.050 ± 0.005

(1.27 ± 0.13)

0.150 ± 0.008

(3.81 ± 0.2)

0.615 Max

(15.62)

0.078 ± 0.005

(1.98 ± 0.13)

0.015 ± 0.002

(0.38 ± 0.05)

0.030 ± 0.002

(0.76 ± 0.05)

0.100 ± 0.005

(2.54 ± 0.13)

0.400 ± 0.010

(10.16 ± 0.25)

VISHAY

VPR221

1R0 1 %

0101

0.245 ± 0.010

(6.22 ± 0.25)

0.141 ± 0.005 Dia

(3.58 ± 0.13)

0.540 ± 0.040

(13.72 ± 1.02)

0.115 ± 0.005

(2.92 ± 0.13)

0.050 ± 0.005

(1.27 ± 0.13)

0.200 ± 0.030

(5.08 ± 0.76)

E

1

I

2

I

1