WSLF1206

www.vishay.com

Vishay Dale

Revision: 17-Oct-2025

2

Document Number: 30430

For technical questions, contact: ww2bresistors@vishay.com

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

Notes

• Consult factory for detailed TCR performance across full temperature range as performance is resistance value specific

• “Temperature Coefficient of Resistance for Current Sensing” white paper: www.vishay.com/doc?30405

(1) Component TCR - total TCR that includes the TCR effects of the resistor element and the copper terminal

(2) Element TCR - only applies to the alloy used for the resistor element

(3) Maximum working voltage - the WSL is not voltage sensitive, but is limited by power / energy dissipation and is also not ESD sensitive

DIMENSIONS

Note

• Surface mount solder profile recommendations: www.vishay.com/doc?31052

Note

(1) The full power rating of Power Metal Strip resistors are dependent upon the ability of the circuit board to dissipate the heat energy created

in the resistance element. It is recommended to follow common design practices for power semiconductors that ensure the junction

temperature is maintained with in thermal limits by using large pad surfaces, thermal vias, heavier copper weights, internal layers as well as

other thermal spreading features. The thermal resistance values provided function in the same manner as junction to terminal temperature

TECHNICAL SPECIFICATIONS

PARAMETER

UNIT

WSLF1206 RESISTOR CHARACTERISTICS

Temperature coefficient (-65 °C to +170 °C)

(complete resistor) (1)

ppm/°C

± 275 for 0.3 m

Ω

± 200 for 0.5 m

Ω

± 100 for 1 m

Ω

± 75 for 2 m

Ω to 3 mΩ

Temperature coefficient (20 °C to 60 °C)

(only element material) (2)

ppm/°C

± 20

Operating temperature range

°C

-55 to +170

Maximum working voltage (3)

V(P x R)1/2

GLOBAL MODEL

RESISTANCE

VALUE (mΩ)

DIMENSIONS

SOLDER PAD DIMENSIONS

LW

T

A

a

b

c

WSLF1206

0.3

0.126 ± 0.008

(3.2 ± 0.2)

0.065 ± 0.008

(1.65 ± 0.2)

0.047 ± 0.006

(1.20 ± 0.15)

0.031 ± 0.008

(0.80 ± 0.2)

0.061

(1.55)

0.051

(1.30)

0.074

(1.88)

0.5

0.035 ± 0.006

(0.90 ± 0.15)

1

0.033 ± 0.006

(0.85 ± 0.15)

2

3

0.031 ± 0.006

(0.80 ± 0.15)

GLOBAL MODEL

RESISTANCE VALUE (mΩ)

THERMAL RESISTANCE (°C/W)

ELEMENT MATERIAL

WSLF1206

0.3

1.7

MnCuSn

0.5

4.9

MnCu

110

MnCu

214

FeCrAl

320

FeCrAl

L

W

c

bab

A

A

T