Document Number: 63113

For any questions, contact: foil@vishay.com

www.vishay.com

Revision: 19-Apr-07

3

Z201 (Z-Foil)

Ultra High Precision Z-Foil Resistor with TCR of

± 0.05 ppm/°C, PCR of 5 ppm at Rated Power, Tolerance

of ± 0.005 % and Load Life Stability of ± 0.005 %

Vishay Foil Resistors

STANDARD MEASUREMENT (at room temperature)

Standard Test Conditions:

• Temperature: + 23 °C ± 2 °C

• Relative humidity: 35 to 65 % RH

IMPROVED PERFORMANCE TESTING

The preceding information is based on product directly off the production line. Improved performance (meaning increased time

stability with load and other stresses) is available through factory conducted "Improved Performance Testing". The test routine

is usually tailored to the user’s stability objectives. A screened product can be brought down to a potential load life drift of less

than 50 ppm.

For example, the data sheet “7 Technical Reasons to Specify BMF Resistive Components” shows the drift characteristics of a

standard product.

Various screen test routines are available and all anticipated stresses must be taken into account before settling on one specific

test routine. Our Applications Engineering Department is available to discuss and recommend appropriate routines given the full

spectrum of anticipated stresses and stability requirements.

TABLE 3 - ENVIRONMENTAL PERFORMANCE COMPARISON

MIL-PRF-55182

CHAR J

VISHAY Z201

MAXIMUM

ΔR

TYPICAL

ΔR

Test Group I

Thermal Shock

Short Time Overload

± 0.2 %

± 0.2 %

± 0.01 % (100 ppm)

± 0.01 % (100 ppm)

± 0.002 % (20 ppm)

± 0.003 % (30 ppm)

Test Group II

Resistance Temperature

Characteristic

Low Temperature Storage

Low Temperature Operation

Terminal Strength

± 25 ppm/°C

± 0.15 %

± 0.15 %

± 0.2 %

see Table 1

± 0.01 % (100 ppm)

± 0.01 % (100 ppm)

± 0.01 % (100 ppm)

± 0.05 ppm/°C

(0 °C to + 60 °C)

± 0.002 % (20 ppm)

± 0.002 % (20 ppm)

± 0.002 % (20 ppm)

Test Group III

DWV

Resistance to Solder Heat

Moisture Resistance

± 0.15 %

± 0.1 %

± 0.4 %

± 0.01 % (100 ppm)

± 0.01 % (100 ppm)

± 0.05 % (500 ppm)

± 0.002 % (20 ppm)

± 0.005 % (50 ppm)

± 0.01 % (100 ppm)

Test Group IV

Shock

Vibration

± 0.2 %

± 0.2 %

± 0.01 % (100 ppm)

± 0.01 % (100 ppm)

± 0.002 % (20 ppm)

± 0.002 % (20 ppm)

Test Group V

Life Test at 0.3 W/+ 125 °C

2000 hours

10 000 hours

± 0.5 %

± 2.0 %

± 0.015 % (150 ppm)

± 0.05 % (500 ppm)

± 0.01 % (100 ppm)

± 0.03 % (300 ppm)

Test Group Va

Life Test at 0.6 W (2 x Rated Power)/+ 70 °C, 2000 hours

± 0.5 %

± 0.015 % (150 ppm)

± 0.01 % (100 ppm)

Test Group VI

High Temperature Exposure

± 2.0 %

± 0.1 % (1000 ppm)

± 0.05 % (500 ppm)

Test Group VII

Voltage Coefficient

0.005 %/V

< 0.00001 %/V

< 0.00001 %/V