www.vishay.com
WSF
Vishay Dale
Metal Film Resistors, Power, Surface Mount
Note
* This datasheet provides information about parts that are
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)
• AEC-Q200 qualified (1)
• Material categorization:
for definitions of compliance please see
www.vishay.com/doc?99912
Note
(1) Flame retardance test may not be applicable to
some resistor technologies
Available
Available
Available
Available
Available
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL
MODEL
WSF2012
WSF2515
WSF4527
SIZE INCH
2012
2515
4527
POWER RATING
P70 °C
W
0.5
1.0
2.0 (3)
TOLERANCE
±%
0.5, 1, 5
0.5, 1, 5
0.5, 1, 5
RESISTANCE
RANGE
5.0 to 1.43K (1)
10 to 10K
10 to 100K
TEMPERATURE
COEFFICIENT (2)
± ppm/°C
100
100
100
ENCAPSULATION
Epoxy
Thermoplastic
Thermoplastic
Notes
• WSF2012 has been obsoleted; PTN-DR-00013-2018 Rev. 0 - July 20, 2018. WSF2515 and WSF4527 sizes are not affected
(1) E96 values only
(2) ± 50 ppm/°C and ± 25 ppm/°C available
(3) Resistance values above 31.25 k are limited to 250 V maximum working voltage
TECHNICAL SPECIFICATIONS
PARAMETER
Dielectric withstanding voltage
Insulation resistance
Operating temperature range
Maximum working voltage
Weight/1000 pieces (typical)
UNIT
VAC
°C
V
g
WSF2012
> 500
-65 / +175
(P x R)1/2
90
WSF2515
> 500
> 109
-65 / +175
(P x R)1/2
165
WSF4527
> 500
-65 / +150
(P x R)1/2 (1)
760
Notes
• Part marking: 1/2 W - DALE, value; 1 W - model, value, tolerance, date code; 2 W - DALE, model, value, tolerance, date code
(1) Resistance values above 31.25 k are limited to 250 V maximum working voltage
GLOBAL PART NUMBER INFORMATION
Global Part Numbering example: WSF25151K500JKTA (preferred numbering format)
WS F 2 5 1 5 1 K 5 0 0 J K T A
GLOBAL MODEL
WSF2515
WSF4527
VALUE
R = decimal
K = thousand
100R0 = 100
1K000 = 1 k
TOLERANCE
D = ± 0.5 %
F = ± 1.0 %
G = ± 2.0 %
H = ± 3.0 %
J = ± 5.0 %
K = ± 10 %
TCR
E = ± 25 ppm/°C
H = ± 50 ppm/°C
K = ± 100 ppm/°C
PACKAGING
EA = lead (Pb)-free,
tape / reel
EK = lead (Pb)-free, bulk
TA = tin / lead, tape / reel
(R86)
BA = tin / lead,
tape / reel, bulk (B43)
SPECIAL
(dash number)
(up to 2 digits)
from 1 to 99 as
applicable
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
Note
• WSF2012 has been obsoleted; PTN-DR-00013-2018 Rev. 0 - July 20, 2018. WSF2515 and WSF4527 sizes are not affected
Revision: 05-Sep-2019
1 Document Number: 30104
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
