Low Value (down to 0.001

Ω), Surface Mount

www.vishay.com

Document Number: 31059

32

Revision: 01-Jul-09

WSR High Power

Vishay Dale

FEATURES

• Molded high temperature encapsulation

• Improved thermal management incorporated

into design

• Ideal for all types of current sensing, voltage

division

and

pulse

applications

including

switching

and

linear

power

supplies,

instrumentation, power amplifiers

• Proprietary processing technique produces

extremely low resistance values (down to

0.001

Ω)

• All welded construction

• Solid metal Nickel-Chrome or Manganese-Copper alloy

resistive element with low TCR (< 20 ppm/°C)

• Solderable terminations

• Very low inductance 0.5 nH to 5 nH

• Excellent frequency response to 50 MHz

• Low thermal EMF (< 3 µV/°C)

• Compliant to RoHS directive 2002/95/EC

• Integral heat sink not utilized for resistance values less

than 0.0075

Ω

Note

≤ 120 °C

• Part Marking: DALE, Model, Value, Tolerance, Date Code

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

STANDARD ELECTRICAL SPECIFICATIONS

GLOBAL

MODEL

SIZE

POWER RATING

RESISTANCE RANGE

Ω

± 0.5 %

± 1 %

WSR5

4527

0.01 to 0.3

0.001 to 0.3

TECHNICAL SPECIFICATIONS

PARAMETER

UNIT

WSR5

Temperature Coefficient

ppm/°C

0.0075

Ω to 0.0099 Ω = ± 110

0.01

Ω to 0.3 Ω = ± 75

Dielectric Withstanding Voltage

> 500

Insulation Resistance

Ω

Operating Temperature Range

°C

- 65 to + 275

Maximum Working Voltage

V

(

Weight/1000 pieces

g

476

GLOBAL MODEL

VALUE

TOLERANCE

PACKAGING

SPECIAL

WSR5

L = m

Ω*

D = ± 0.5 %

EA = Lead (Pb)-free, tape/reel

(Dash Number)

R = Decimal

F = ± 1.0 %

EK = Lead (Pb)-free, bulk

(Up to 2 digits)

5L000 = 0.005

Ω

J = ± 5.0 %

TA = Tin/lead, tape/reel (R86)

From 1 to 99 as

R0100 = 0.01

Ω

BA = Tin/lead, bulk (B43)

applicable

GLOBAL PART NUMBER INFORMATION

WSR5

0.01

Ω

1 %

R86

HISTORICAL MODEL

RESISTANCE VALUE

TOLERANCE CODE

PACKAGING

WS

R

5

R

0

1

0

0

F

T

A

* Use “L” for resistance

values < 0.01

Ω

NEW GLOBAL PART NUMBERING: WSR5R0100FTA (PREFERRED PART NUMBERING FORMAT)

HISTORICAL PART NUMBER EXAMPLE: WSR5 0.01

Ω 1 % R86 (WILL CONTINUE TO BE ACCEPTED)