Document Number: 63064

For any questions, contact: foil@vishay.com

www.vishay.com

Revision: 22-Sep-08

1

VPR220Z (Z-Foil)

Vishay Foil Resistors

Ultra High Precision Z-Foil Power Resistor in

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

Tolerance to ± 0.01 % and Power Rating to 8 W

Vishay Foil Resistors manufacture any resistance value

within the given resistance range (e.g. 10

Ω or

10.1234

Ω) without influencing cost or lead time

very low TCR, high stability, tight tolerance, low PCR and fast

response time in a small 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”: 4 ppm/W typical

• Electrostatic discharge (ESD) above 25 000 V

• Load life stability: ± 0.005 % (25 °C, 2000 h at rated power)

• Resistance range: 5 Ω to 10 kΩ (Any value available within

resistance range e.g. 1K2345)

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

• Thermal stabilization < 1 s

• Rise time: 1 ns without ringing

• Optimized for military and space applications according to

EEE-INST-002 screening and MIL-PRF 39009

• Non inductive, non capacitive design

• Current noise: < - 40 dB

• Voltage coefficient: < 0.1 ppm/V

• 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

• Also available in a surface mount version, the VPR220SZ

• Prototype samples available from 72 h. For more

information, please contact foil@vishay.com

• For higher performances please contact us

Weight = 1 g maximum

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

TABLE 1 - VPR220Z (- 55 °C to + 125 °C, + 25 °C Ref.)

RESISTANCE

RANGE (

Ω)

TIGHTEST

RESISTANCE

TOLERANCE

TYPICAL TCR AND

MAX. SPREAD

(ppm/°C)

50 to 10K

± 0.01 %

± 0.2 ± 2.3

25 to < 50

± 0.02 %

10 to < 25

± 0.05 %

5 to < 10

± 0.1 %

FIGURE 1 - POWER DERATING CURVE

Ambient Temperature (°C)

+ 150

+ 125

+ 100

+ 75

+ 50

+ 25

0

- 25

- 50

+ 100

+ 75

+ 50

+ 25

0

- 55 °C