WSF

www.vishay.com

Vishay Dale

Revision: 08-Jun-2020

1

Document Number: 30104

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

Metal Film Resistors, Power, Surface Mount

Note



RoHS-compliant and / or parts that are non RoHS-compliant. For



example, parts with lead (Pb) terminations are not RoHS-compliant.



Please see the information / tables in this datasheet for details

FEATURES

• Molded encapsulation

• Wraparound compliant terminations eliminate

risk of solder fillet cracking

• Solderable terminations

• Excellent stability at different environmental

conditions

• High power ratings (up to 2 W)

• Material categorization:



for definitions of compliance please see

www.vishay.com/doc?99912

Note

some resistor technologies

Notes

• WSF2012 has been obsoleted; PTN-DR-00013-2018 Rev. 0 - July 20, 2018. WSF2515 and WSF4527 sizes are not affected

 are limited to 250 V maximum working voltage

Notes

• Part marking: 1/2 W - DALE, value; 1 W - model, value, tolerance, date code; 2 W - DALE, model, value, tolerance, date code

 are limited to 250 V maximum working voltage

Note

• WSF2012 has been obsoleted; PTN-DR-00013-2018 Rev. 0 - July 20, 2018. WSF2515 and WSF4527 sizes are not affected

Available

Available

Available

Available

Available

STANDARD ELECTRICAL SPECIFICATIONS

GLOBAL

MODEL

SIZE INCH

POWER RATING

W

TOLERANCE

± %

RESISTANCE

RANGE



TEMPERATURE

± ppm/°C

ENCAPSULATION

WSF2515

2515

1.0

0.5, 1, 5

10 to 10K

100

Thermoplastic

WSF4527

4527

0.5, 1, 5

10 to 100K

100

Thermoplastic

TECHNICAL SPECIFICATIONS

PARAMETER

UNIT

WSF2515

WSF4527

Dielectric withstanding voltage

> 500

> 500

Insulation resistance



Operating temperature range

°C

-65 / +175

-65 / +150

Maximum working voltage

V

Weight/1000 pieces (typical)

g

165

760

GLOBAL PART NUMBER INFORMATION

Global Part Numbering Example: WSF25151K500JKTA (preferred numbering format)

GLOBAL MODEL

VALUE

TOLERANCE

TCR

PACKAGING

SPECIAL

WSF2515

WSF4527

R = decimal

K = thousand

100R0 = 100



1K000 = 1 k



D = ± 0.5 %

F = ± 1.0 %

G = ± 2.0 %

H = ± 3.0 %

J = ± 5.0 %

K = ± 10 %

E = ± 25 ppm/°C

H = ± 50 ppm/°C

K = ± 100 ppm/°C

EA = lead (Pb)-free,

tape / reel

EK = lead (Pb)-free, bulk

(dash number)

(up to 2 digits)

from 1 to 99 as

applicable

TA = tin / lead, tape / reel

(R86)

BA = tin / lead,

tape / reel, bulk (B43)

Historical Part Numbering Example: WSF2515 1.5 k

 5 % 100 ppm/°C R86 (will continue to be accepted for tin/lead product only)

WSF2515

1.5 k



5 %

100 ppm/°C

R86

HISTORICAL MODEL

RESISTANCE VALUE

TOLERANCE CODE

TEMPERATURE

COEFFICIENT

PACKAGING

S

F

2515

1

K

5

W

00

J

K

T

A