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 available
(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
WSF2012
WSF2515
WSF4527
SIZE INCH
2012
2515
4527
POWER RATING
P
70 °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
(2)
10 to 10K
10 to 100K
TEMPERATURE
COEFFICIENT
(4)
± ppm/°C
100
100
100
ENCAPSULATION
Epoxy
Thermoplastic
Thermoplastic
TECHNICAL SPECIFICATIONS
PARAMETER
Dielectric withstanding voltage
Insulation resistance
Operating temperature range
Maximum working voltage
Weight/1000 pieces (typical)
UNIT
V
AC
°C
V
g
- 65/+ 175
(P x
R)
1/2
90
WSF2012
> 500
WSF2515
> 500
> 10
9
- 65/+ 175
(P x
R)
1/2
165
- 65/+ 150
(P x R)
1/2 (3)
760
WSF4527
> 500
Notes
• Part marking: 1/2 W - DALE, value; 1 W - model, value, tolerance, date code; 2 W - DALE, model, value, tolerance, date code.
(2)
E96 values only.
(3)
Resistance values above 31.25 k are limited to 250 V maximum working voltage.
(4)
± 50 ppm/°C and ± 25 ppm/°C available.
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
WSF2012
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
Revision: 06-Nov-14
1.5 k
RESISTANCE VALUE
5%
TOLERANCE CODE
100 ppm/°C
TEMPERATURE
COEFFICIENT
R86
PACKAGING
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
MODEL
W
H
Vishay Dale
DIMENSIONS
in inches (millimeters)
L
H
T
W
W
1
0.200 ± 0.020 0.096 ± 0.015 0.040 ± 0.010 0.125 ± 0.005 0.050 ± 0.005
(5.08 ± 0.508) (2.44 ± 0.381) (1.02 ± 0.254) (3.18 ± 0.127) (1.27 ± 0.127)
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)
WSF2012
WSF2515
WSF4527
T
L
W
1
l
MODEL
b
SOLDER PAD DIMENSIONS
in inches (millimeters)
a
0.085 (2.16)
0.090 (2.29)
0.155 (3.94)
b
0.070 (1.78)
0.115 (2.92)
0.230 (5.94)
l
0.080 (2.03)
0.120 (3.05)
0.205 (5.21)
WSF2012
WSF2515
a
WSF4527
Temperature Rise in °C
Rated Power in %
200
120
100
80
60
40
WSF2012
WSF2515
150
WSF2515
100
WSF2012
WSF4527
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
Temperature Rise
Derating
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
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
WSF2012
WSF2515
WSF4527
REEL
TAPE WIDTH
12 mm/embossed plastic
16 mm/embossed plastic
24 mm/embossed plastic
DIAMETER
330 mm/13"
330 mm/13"
330 mm/13"
PIECES/REEL
2000
2000
1200
CODE
EA/TA
EA/TA
EA/TA
Note
• Embossed Carrier Tape per EIA-481.
Revision: 06-Nov-14
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 such applications.
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.
Material Category Policy
Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as RoHS-Compliant fulfill the
definitions and restrictions defined under Directive 2011/65/EU of The European Parliament and of the Council
of June 8, 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment
(EEE) - recast, unless otherwise specified as non-compliant.
Please note that some Vishay documentation may still make reference to RoHS Directive 2002/95/EC. We confirm that
all the products identified as being compliant to Directive 2002/95/EC conform to Directive 2011/65/EU.
Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as Halogen-Free follow Halogen-Free
requirements as per JEDEC JS709A standards. Please note that some Vishay documentation may still make reference
to the IEC 61249-2-21 definition. We confirm that all the products identified as being compliant to IEC 61249-2-21
conform to JEDEC JS709A standards.
Revision: 02-Oct-12
1
Document Number: 91000
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