Document Number: 63001

For any questions, contact: foil@vishay.com

www.vishay.com

Revision: 20-Nov-07

1

S Series

Vishay Foil Resistors

High Precision Foil Resistor with TCR of ± 2.0 ppm/°C,

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

Any value at any tolerance available within resistance range

INTRODUCTION

resistor technologies available today for applications that

require high precision and high stability.

This technology has been pioneered and developed by

VISHAY, and products based on this technology are the

most suitable for a wide range of applications. BMF

technology allows us to produce customer orientated

products, designed to satisfy challenging and specific

technical requirements.

Model S Series made from Vishay BMF offers low TCR,

excellent load life stability, tight tolerance, fast response

time, low current noise, low thermal EMF and low voltage

coefficient, all in one resistor.

The S Series is virtually insensitive to destabillizing factors.

The resistor element is a solid alloy that displays the

desirable bulk properties of its parent material, thus it is

inherently stable and noise free.

generation of precision resistors. The standard design of

these

resistors

provides

a

unique

combination

of

characteristics found in no other single resistor.

Our Application Engineering Department is available to

advise and to make recommendations. For non-standard

technical requirements and special applications, please

contact us.

FEATURES

• Temperature coefficient of resistance (TCR):

- 55 °C to + 125 °C, 25 °C ref.

− S102C series: ± 2 ppm/°C typical (see table 1)

− S102K series: ± 1 ppm/°C typical (see table 1)

• Rated power: to 1 W at + 125 °C

• Tolerance: ± 0.005 %

• Load life stability: to ± 0.005 % at 70 °C, 2000 h at rated

power

• Resistance range: 0.5 Ω to 1 MΩ (higher or lower values of

resistance are available)

• Electrostatic discharge above 25 000 V

• Non inductive, non capacitive design

• Rise time: 1 ns without ringing

• Current noise: < - 40 dB

• Thermal EMF: 0.05 µV/°C typical

• Voltage coefficient: < 0.1 ppm/V

• Low inductance: < 0.08 µH typical

• Non hot spot design

• Terminal finishes available:

lead (Pb)-free

tin/lead alloy

• Matched sets are available per request

(TCR Tracking: to 0.5 ppm/°C)

Z201 datasheet

APPLICATIONS

• High precision amplifiers

• Down-hole (high temperature)

• High precision instrumentation

• Medical and test equipment

• Industrial

• Audio (high end stereo equipment)

• EB applications (electron beam scanning and recording

equipment, electron microscopes)

• Military, airborne

• Measurement instrumentation

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

TABLE 1 - RESISTANCE VERSUS TCR

(- 55 °C to + 125 °C, + 25 °C Ref.)

RESISTOR

RESISTANCE

VALUE (

Ω)

TYPICAL TCR AND

MAX SPREAD

(ppm/°C)

S102(C)

80 to < 150K

± 2 ± 2.5

S102(K)

80 to < 100K

± 1 ± 2.5

S102(C)

50 to < 80

± 2 ± 3.5

S102(K)

± 1 ± 3.5

S102(C)

1 to < 50

± 2 ± 4.5

S102(K)

± 1 ± 4.5

FIGURE 1 - FOIL RESISTOR TCR COMPARISON OF

FOIL ALLOYS IN MILITARY RANGE

Available

Pb-free

RoHS*

COMPLIANT

- 50

- 25

0

+ 25

+ 50

+ 75

+ 100

+ 125

- 55

C Alloy

2 ppm/

K Alloy

1 ppm/

1 ppm/

2 ppm/

+ 150

+ 100

+ 50

0

- 50

- 100

- 150

- 200

R

(ppm)

Temperature (°C)