VISHAY VPR220SZ Technical data

VPR220SZ (Z-Foil)

Vishay Foil Resistors

Ultra High Precision Z-Foil Surface Mount Power Resistors in

TO-220 Configuration with TCR of ± 0.05 ppm/°C,

Tolerance to ± 0.01 % and Power Rating to 8 W

Any value at any tolerance available within resistance range

Model VPR220SZ, made from Vishay Bulk Metal® Z-Foil,
offers very low TCR, high stability, tight tolerance, low PCR
and fast response time in a small surface mount molded
resistor.

The Z-Foil technology provides a significant reduction of the
resistive components sensitivity to ambient temperature
variations and applied power changes. Designers now can
guarantee a high degree of stability and accuracy in fixed
resistor applications using solutions based on Vishay’s
revolutionary Z-Foil technology.

Our Application Engineering Department is available to
advise and make recommendations. For non-standard
technical requirements and special applications, please
contact us.

FEATURES

•

Temperature Coefficient of Resistance (TCR):
± 0.05 ppm/°C typical (0 °C to + 60 °C)
± 0.2 ppm/°C typical (- 55 °C to + 125 °C,

- 25 °C Ref.)

• Tolerance: to ± 0.01 %

• Power Coefficient of Resistance (PCR) “ΔR

due to self heating”: 5 ppm at rated power

• Electrostatic Discharge (ESD) above 25 000 V

• Load Life Stability: ± 0.005 % (25 °C, 2000 hours at Rated

Power)

• Resistance Range: 5 Ω to 10 kΩ

• Power Rating: 8 W chassis mounted (per MIL-PRF-39009)

• Non Inductive, Non Capacitive Design

• Current Noise: < - 40 dB

• Voltage Coefficient: < 0.1 ppm/W

• Non Inductive: < 0.08 µH

• Non Hot Spot Design

• Thermal EMF: 0.05 µV/°C typical

• Terminal Finishes Available: Lead (Pb)-free

Tin/Lead Alloy

•

For higher performances please contact us

Pb-free

Available

RoHS*

COMPLIANT

TABLE 1 - SPECIFICATIONS

Load Life Stability at 2000 h

Power Rating at + 25 °C

Current Noise

High Frequency Operation

Rise Time
Inductance3) (L)
Capacitance (C)

Voltage Coefficient

Operating Temperature
Range

Maximum Working Voltage

Thermal EMF

4)

5)

± 0.05 % max ΔR under full rated
power at + 25 °C

8 W or 3 A1) on heat sink

1.5 Wor 3 A1) in free air

Further derating not necessary.

< 0.010 µV (rms)/V of applied
voltage (- 40 dB)

1 ns

0.1 µH maximum: 0.03 µH typical

1.0 pF maximum: 0.5 pF typical

< 0.1 ppm/V

- 55 °C to + 150 °C

300 V. Not to exceed power rating.

0.15 µV/°C maximum (lead effect)

2)

Notes

1. Whichever is lower.

2. Heat sink chassis dimensions and requirements per
MIL-PRF-39009:

DIMENSION

L 6.00 152.4

W 4.00 101.6

H 2.00 50.8

T 0.04 1.0

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.

INCHES mm

TABLE 2 - VPR220SZ

1)

RESISTANCE RANGE (Ω) TIGHTEST RESISTANCE TOLERANCE

50 to 10K ± 0.01 %

25 to < 50 ± 0.02 %

10 to < 25 ± 0.05 %

5 to < 10 ± 0.1 %

Weight = 1 g Maximum

Note

1. Maximum specifications.

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

www.vishay.com For any questions, contact: [e-mail]
1 Revision: 06-Aug-07

- 55 °C to + 125 °C, Ref. + 25 °C

TCR

± 2.5 ppm/°C

Document Number: 63068

VPR220SZ (Z-Foil)

k

Ultra High Precision Z-Foil Surface Mount Power Resistors

in TO-220 Configuration with TCR of ± 0.05 ppm/°C,

Tolerance to ± 0.01 % and Power Rating to 8 W

FIGURE 1 - POWER DERATING CURVE

- 55 °C

+ 100

+ 75

+ 50

+ 25

Percent of Rated Power

0

Ambient Temperature (°C)

FIGURE 3 - VPR220SZ FORMING

0.050 ± 0.005
(1.27 ± 0.13)

Heat Sink

DIMENSIONS

0.365 (9.27) Ref

0.150 ± 0.008
(3.81 ± 0.20)

Before Forming

After Forming

0.695 ± 0.010
(17.65 ± 0.25)

0.090 (2.286) Ref

in inches (millimeters)

0.015 ± 0.002
(0.38 ± 0.05)

0.078 ± 0.005
(1.98 ± 0.13)

0.110 (2.79) Ref

0.090 ± 0.010
(2.29 ± 0.25)

Flush with Heat Sin

Within ±0.002 (± 0.05)

Vishay Foil Resistors

FIGURE 2 - TRIMMING TO VALUES

(Conceptual Illustration)

Interloop Capacitance
Reduction in Series

Current Path

Mutual Inductance
Reduction due
to Change in
Current Direction

+ 150+ 125+ 100+ 75+ 50+ 250- 25- 50

Note: Foil shown in black, etched spaces in white

After Trimming

FIGURE 4 - VPR220SZ DIMENSIONS

in inches (millimeters)

0.400 ± 0.010
(10.16 ± 0.25)

0.245 ± 0.010
(6.22 ± 0.25)

0.200 ± 0.030
(5.08 ± 0.76)

VISHAY

VPR220SZ

1K0 1 %

0101

0.200 ± 0.005
(5.08 ± 0.13)

0.115 ± 0.005
(2.92 ± 0.13)

0.141 ± 0.005 Diameter
(3.58 ± 0.13)

0.050 ± 0.005
(1.27 ± 0.13)

0.030 ± 0.002
(0.76 ± 0.05)

Current Path

Before Trimming

Trimming Process

Removes this Material

from Shorting Strip Area

Changing Current Path

and Increasing

Resistance

FIGURE 5 - LAND PATTERN DIMENSIONS in inches (millimeters)

0.050 ± 0.010
(1.27 ± 0.25)

0.120 ± 0.010
(3.05 ± 0.25)

Document Number: 63068 For any questions, contact: [e-mail]
Revision: 06-Aug-07 2

0.200 ± 0.005
(5.08 ± 0.13)

www.vishay.com