Low Value (down to 0.001

Ω), Surface Mount, 4-Terminal

www.vishay.com

For technical questions, contact: ww2bresistors@vishay.com

Document Number: 30108

20

Revision: 26-Mar-07

WSK

Vishay Dale

FEATURES

• 4-Terminal design allows for 1 % tolerance down

to 0.001

Ω and 0.5 % tolerance down to 0.003 Ω

• Ideal for all types of precision current sensing,

voltage division

and

pulse

applications

including switching and linear power supplies,

instruments, 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

• Lead (Pb)-free version is RoHS compliant

Note

• Part Marking: DALE, Value, Tolerance; due to resistor size limitations some resistance values will be marked with only the resistance value

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

Available

Pb-free

RoHS*

COMPLIANT

e3

STANDARD ELECTRICAL SPECIFICATIONS

GLOBAL

MODEL

POWER RATING

W

RESISTANCE RANGE

Ω

± 0.5 %

± 1.0 %

WSK2512

1.0

0.003 - 0.025

0.001 - 0.025

TECHNICAL SPECIFICATIONS

PARAMETER

UNIT

WSK2512

Temperature Coefficient

ppm/°C

0.001

Ω - 0.0029 Ω = ± 250

0.003

Ω - 0.0049 Ω = ± 75

0.005

Ω - 0.025 Ω = ± 35

Operating Temperature Range

°C

- 65 to + 170

Maximum Working Voltage

V

(

Weight/1000 pieces

g

63.6

GLOBAL PART NUMBER INFORMATION

NEW GLOBAL PART NUMBERING: WSK25125L000FTA (PREFERRED PART NUMBERING FORMAT)

GLOBAL MODEL

RESISTANCE VALUE

TOLERANCE CODE

PACKAGING CODE

SPECIAL

WSK2512

L = m

Ω*

R = Decimal

5L000 = 0.005

Ω

R0100 = 0.01

Ω

* use “L” for resistance

values < 0.01

Ω

D = ± 0.5 %

F = ± 1.0 %

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

EK = Lead (Pb)-free, bulk

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

BA = Tin/lead, bulk (B43)

(Dash Number)

(up to 2 digits)

From 1 - 99 as

applicable

HISTORICAL PART NUMBERING: WSK2512 0.005

Ω 1 % R86 (WILL CONTINUE TO BE ACCEPTED)

WSK2512

0.005

Ω

1 %

R86

HISTORICAL MODEL

RESISTANCE VALUE

TOLERANCE CODE

PACKAGING

K2

5

1

5

L

0

2

WS

T

0

FA

0