WSF
www.vishay.com
Vishay Dale
Metal Film Resistors, Power, Surface Mount
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
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
Available
Available
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL
MODEL
SIZE INCH
POWER RATING
P
70 °C
W
1.0
2.0
(3)
TOLERANCE
±%
RESISTANCE
RANGE
10 to 10K
10 to 100K
TEMPERATURE
COEFFICIENT
(2)
± ppm/°C
100
100
ENCAPSULATION
WSF2515
2515
0.5, 1, 5
Thermoplastic
0.5, 1, 5
Thermoplastic
WSF4527
4527
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
UNIT
WSF2515
WSF4527
> 500
> 500
Dielectric withstanding voltage
V
AC
9
Insulation resistance
> 10
Operating temperature range
°C
-65 / +175
-65 / +150
1/2
(P x R)
1/2 (1)
Maximum working voltage
V
(P x R)
Weight/1000 pieces (typical)
g
165
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)
W
S
F
2
5
1
5
1
K
5
0
TCR
0
J
K
T
A
SPECIAL
(dash number)
(up to 2 digits)
from
1 to 99
as
applicable
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 %
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)
E
= ± 25 ppm/°C
H
= ± 50 ppm/°C
K
= ± 100 ppm/°C
Historical Part Numbering Example: WSF2515 1.5 k 5 % 100 ppm/°C R86 (will continue to be accepted for tin/lead product only)
WSF2515
HISTORICAL MODEL
1.5 k
RESISTANCE VALUE
5%
TOLERANCE CODE
100 ppm/°C
TEMPERATURE
COEFFICIENT
R86
PACKAGING
Note
• WSF2012 has been obsoleted; PTN-DR-00013-2018 Rev. 0 - July 20, 2018. WSF2515 and WSF4527 sizes are
not
affected
Revision: 08-Jun-2020
Document Number: 30104
1
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
WSF
www.vishay.com
DIMENSIONS
DIMENSIONS
in inches (millimeters)
L
H
T
W
W
1
0.250 ± 0.020 0.110 ± 0.015 0.045 ± 0.010 0.150 ± 0.005 0.098 ± 0.005
(6.35 ± 0.508) (2.79 ± 0.381) (1.14 ± 0.254) (3.81 ± 0.127) (2.49 ± 0.127)
0.455 ± 0.020 0.167 ± 0.010 0.100 ± 0.010 0.275 ± 0.005 0.215 ± 0.005
(11.56 ± 0.508) (4.24 ± 0.254) (2.54 ± 0.254) (6.98 ± 0.127) (5.46 ± 0.127)
Vishay Dale
W
H
MODEL
WSF2515
W
1
WSF4527
T
L
MODEL
l
b
SOLDER PAD DIMENSIONS
in inches (millimeters)
a
0.090 (2.29)
0.155 (3.94)
b
0.115 (2.92)
0.230 (5.94)
l
0.120 (3.05)
0.205 (5.21)
WSF2515
WSF4527
a
Note
• WSF2012 has been obsoleted; PTN-DR-00013-2018 Rev. 0 - July 20, 2018. WSF2515 and WSF4527 sizes are
not
affected
Temperature Rise in °C
Rated Power in %
200
120
100
80
60
40
50
20
0
0
0.5
1.0
1.5
2.0
Power in W
0
-65
-25
0
25
50
WSF4527
75 100 125 150 175 200
Ambient Temperature in °C
70
WSF2515
150
WSF2515
100
WSF4527
Temperature Rise
PERFORMANCE
TEST
Thermal shock
Short time overload
Low temperature storage
High temperature exposure
Bias humidity
Moisture resistance
Mechanical shock
Vibration
Load life
Resistance to solder heat
Derating
CONDITIONS OF TEST
-55 °C to +150 °C, 1000 cycles, 15 min at each extreme
5 x rated power for 5 s
-65 °C for 24 h
1000 h at +175 °C (150 °C for WSF4527)
+85 °C, 85 % RH, 10 % bias, 1000 h
MIL-STD-202 method 106, 0 % power, 7a and 7b not required
100
g’s
for 6 ms, 5 pulses
Frequency varied 10 Hz to 500 Hz in one min, 3 directions, 9 h
1000 h at rated power, +70 °C, 1.5 h “ON”, 0.5 h “OFF”
+260 °C solder, 10 s to 12 s dwell, 25 mm/s emergence
TEST LIMITS
± (1.0 % + 0.05
) R
± (0.5 % + 0.05
) R
± (0.5 % + 0.05
) R
± (1.0 % + 0.05
) R
± (0.5 % + 0.05
) R
± (0.5 % + 0.05
) R
± (0.5 % + 0.05
) R
± (0.5 % + 0.05
) R
± (1.0 % + 0.05
) R
± (0.5 % + 0.05
) R
PACKAGING
MODEL
WSF2515
WSF4527
REEL
TAPE WIDTH
16 mm / embossed plastic
24 mm / embossed plastic
DIAMETER
330 mm / 13"
330 mm / 13"
PIECES/REEL
2000
1200
CODE
EA/TA
EA/TA
Notes
• Embossed carrier tape per EIA-481
• WSF2012 has been obsoleted; PTN-DR-00013-2018 Rev. 0 - July 20, 2018. WSF2515 and WSF4527 sizes are
not
affected
• Additional packaging details at
www.vishay.com/doc?20051
Revision: 08-Jun-2020
Document Number: 30104
2
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
Legal Disclaimer Notice
www.vishay.com
Vishay
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively,
“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
disclosure relating to any product.
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,
consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular
purpose, non-infringement and merchantability.
Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of
typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding
statements about the suitability of products for a particular application. It is the customer’s responsibility to validate that a
particular product with the properties described in the product specification is suitable for use in a particular application.
Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over
time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s
technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase,
including but not limited to the warranty expressed therein.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
applications or for any other application in which the failure of the Vishay product could result in personal injury or death.
Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk.
Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for
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No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document
or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners.
© 2019 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED
Revision: 01-Jan-2019
1
Document Number: 91000
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