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Document Number: 63113

2

Revision: 19-Apr-07

Z201 (Z-Foil)

Vishay Foil Resistors

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 %

FIGURE 2 - TRIMMING TO VALUES

(Conceptual Illustration)

Mutual Inductance

Reduction due

to Change in

Current Direction

Current Path

Before Trimming

Trimming Process

Removes this Material

from Shorting Strip Area

Changing Current Path

and Increasing

Resistance

Note: Foil shown in black, etched spaces in white

Current Path

After Trimming

Interloop Capacitance

Reduction in Series

FIGURE 3 - TYPICAL TCR CURVE Z-FOIL

+ 500

+ 200

+ 100

0

- 100

- 200

- 300

- 500

- 55

- 25

+ 25

+ 60

+ 75

+ 100

+ 125

Ambient Temperature (°C)

ΔR

R

(ppm)

0

0.05 ppm/°C

- 0.1 ppm/°C

0.1 ppm/°C

0.14 ppm/°C

0.2 ppm/°C

- 0.16 ppm/°C

- 400

+ 300

+ 400

FIGURE 4 - STANDARD IMPRINTING AND DIMENSIONS

* The standoffs shall be so located as to give a lead clearance of 0.010" minimum between the resistor body and the printed circuit board

when the standoffs are seated on the printed circuit board. This is to allow for proper cleaning of flux and other contaminants from the unit

after all soldering processes.

LS

W

L

H

ST

SW

LL

Z 201

Inches

0.150 ± 0.005

0.105 ± 0.010

2.67 ± 0.25

0.300 ± 0.010

7.62 ± 0.25

0.326 ± 0.010

8.28 ± 0.25

0.010 min

0.254 min

0.035 ± 0.01

1.02 ± 0.13

1.000 ± 0.125

25.4 ± 3.18

mm

3.81 ± 0.13

Z 201 L

Inches

0.200 ± 0.005

mm

5.08 ± 0.13

TABLE 2 - Z201 SPECIFICATIONS

Stability

Load Life at 2000 hours

± 0.005 % Max

ΔR at 0.1 W/+ 70 °C

± 0.015 % Max

ΔR at 0.3 W/+ 125 °C

Load Life at 10 000 hours

± 0.01 % Max

ΔR at 0.05 W/+ 125 °C

± 0.05 % Max

ΔR at 0.3 W/+ 125 °C

LS

Model Name

VISHAY

XXXX

Z201

ST

*

H

L

Date Code

W

Front View

Rear View

Lead Material #22 AWG

Round Solder Coated Copper

Optional Customer Part Number

Print specification, etc. if required

Resistance

Value Code

Tolerance

XXXXXX

100R01

0.01%

LL

SW

16

Week

07

Year