WSLF
www.vishay.com
Vishay Dale
Power Metal Strip
®
Resistors,
Low Value (Down to 0.0003
),
Surface-Mount
FEATURES
• Power Metal Strip
®
all-welded construction is
ideal for all types of current sensing, voltage
division, and pulse applications
• Solid metal nickel-chrome, manganese-copper,
or manganese-copper-tin alloy resistive
element with low TCR (< 20 ppm/°C)
• Proprietary processing technique produces
extremely low resistance values, down to
0.0003
DESIGN SUPPORT TOOLS
Models
Available
Design Tools
click logo to get started
• Sulfur resistance by construction that is
unaffected by high sulfur environments
• Very low inductance (< 2 nH)
• Low thermal EMF (< 3 μV/°C)
• AEC-Q200 qualified
(1)
• Material categorization: for definitions of compliance
please see
www.vishay.com/doc?99912
Notes
• Follow link to “Overview of Automotive Grade Products” for
more details:
www.vishay.com\doc?49924
(1)
Flame retardance test may not be applicable to some resistor
technologies
Available
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL
MODEL
SIZE
2512
WSLF2512
2512
2512
POWER
RATING
P
70 °C (1)
W
6.0
5.0
4.0
POWER
RATING
P
100 °C (2)
W
3.0
3.0
2.0
TOLERANCE
%
1.0, 5.0
1.0, 5.0
1.0, 5.0
RESISTANCE VALUE
RANGE
0.3m to 0.5m
1m to 2m
3m
RESISTANCE VALUES
CURRENTLY AVAILABLE
(3)
0.3m, 0.5m
1m, 1.3m, 2m
3m
WEIGHT
(typical)
g/1000 pieces
258
212
267
Notes
• Part marking: no part marking on these parts
(1)
See “Ambient Temperature Derating” on next page, Fig. 1
(2)
See “Terminal Temperature Derating” on next page, Fig. 2
(3)
Other values may be available, contact factory
GLOBAL PART NUMBER INFORMATION
Global Part Numbering: WSLF25121L000FEA (WSLF2512, 0.001
,
± 1 %)
(visit
www.vishay.net
Vishay Dale parts numbering manual for all options)
W
S
L
F
2
5
1
2
1
L
0
0
0
F
E
A
SPECIAL
(2)
(2 digits)
Reserved for future
specials
GLOBAL MODEL
(8 digits)
WSLF2512
RESISTANCE VALUE
(5 digits)
L
= m
L5000
= 0.0005
1L000
= 0.0010
TOLERANCE CODE
(1 digit)
F
= ± 1.0 %
J
= ± 5.0 %
PACKAGING CODE
(1)
(2 digits)
EA
= lead (Pb)-free, tape/reel
EK
= lead (Pb)-free, bulk
Notes
(1)
Packaging code: EB (lead (Pb)-free) are non-standard packaging codes designating 1000 piece reels. These non-standard packaging codes
are identical to our standard EA (lead (Pb)-free), except that they have a package quantity of 1000 pieces
(2)
Follow link for customization capabilities:
www.vishay.com/doc?48163
Revision: 18-Sep-2018
Document Number: 30193
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
WSLF
www.vishay.com
Vishay Dale
TECHNICAL SPECIFICATIONS
PARAMETER
Component temperature coefficient
(including terminal)
(1)
TCR measured from -55 °C to 150 °C
Element TCR
(2)
UNIT
WSLF RESISTOR CHARACTERISTICS
± 200 for 0.3 m and 0.5 m
ppm/°C
± 170 for 1.0 m
± 70 for 2 m and 3 m
ppm/°C
°C
V
< 20
-65 to +170
(P x
R)
1/2
Operating temperature range
Maximum working voltage
(3)
Notes
(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
in inches (millimeters)
D
1
H
L
D
2
W
1
3
2
1) Resistive element: element
material used is dependent
on resistance value.
Refer to Element Material
in table)
2) Terminal:
solid
copper
3) Terminal / element weld
T
Typical current sensing traces
I
b
a
Notes
• 3D models available:
www.vishay.com/doc?30335
• Surface mount solder profile recommendations:
www.vishay.com/doc?31052
DIMENSIONS
MODEL
L
WSLF2512
0.250 ± 0.006
(6.35 ± 0.15)
RESISTANCE
VALUE
(m)
0.3
0.5
1.0
WSLF2512
1.3
2.0
3.0
14.6
17.1
18.2
0.013 (0.33)
0.028 (0.71)
0.019 (0.48)
0.013 (0.33)
0.028 (0.71)
0.019 (0.48)
Mn-Cu
Ni-Cr
Ni-Cr
W
0.120 ± 0.008
(3.02 ± 0.2)
THERMAL
RESISTANCE
(°C/W)
3.8
6.7
12.1
H
0.0138 ± 0.0012
(0.35 ± 0.03)
T
0.045 - 0.016
(1.14 - 0.4)
a
0.71
(1.80)
b
0.13
(3.40)
l
0.13
(3.40)
SOLDER PAD DIMENSIONS
GLOBAL
MODEL
THICKNESS in Inches (millimeters)
ELEMENT MATERIAL
D
1
0.040 (1.02)
0.033 (0.84)
0.017 (0.43)
D
2
0.040 (1.02)
0.033 (0.84)
0.017 (0.43)
Mn-Cu-Sn
Mn-Cu
Mn-Cu
Revision: 18-Sep-2018
Document Number: 30193
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
WSLF
www.vishay.com
DERATING
Rated Power in %
120
100
80
60
40
20
0
-65 -50
Vishay Dale
DERATING - TERMINAL TEMPERATURE
P/P
Norm
in %
120
100
80
60
40
20
0
Stability < 1.0 %
Stability < 0.5 %
0
20
40
60
80
100
120
140
160
180
-25
0
25
50
70
100
125
150 170
Ambient Temperature in °C
Terminal Temperature
T
K
in °C
Fig. 1 - Ambient Temperature Derating
(P
70 °C
of Standard Electrical Specification Table)
Fig. 2 -
P
100 °C
Rated Power;
of Standard Electrical Specification Table
Example L5000
PULSE CAPABILITY
click to get started
VE
TI
A
TR
U
S
LL
I
S
S
E
O
RP
PU
Y
NL
O
www.vishay.com/resistors/power-metal-strip-calculator
PERFORMANCE
TEST
Thermal shock
Short time overload
Low temperature storage
High temperature exposure
Bias humidity
Mechanical shock
Vibration
Load life
Resistance to solder heat
Moisture resistance
CONDITIONS OF TEST
-55 °C to +150 °C, 2000 cycles, 15 min at each extreme
5x rated power for 5 s
-65 °C for 24 h
2000 h at +170 °C
+85 °C, 85 % RH, 10 % bias, 1000 h
100
g’s
for 6 ms, 5 pulses
Frequency varied 10 Hz to 2000 Hz in 1 min, 3 directions, 12 h
2000 h at +70 °C, 1.5 h “ON”, 0.5 h “OFF”
+260 °C solder, 10 s to 12 s dwell, 25 mm/s emergence
MIL-STD-202, method 106, 0 % power, 7a and 7b not required
TEST LIMITS
± 0.5 %
± 0.5 %
± 0.1 %
± 1.0 %
± 0.5 %
± 0.2 %
± 0.2 %
± 1.0 %
± 0.5 %
± 0.1 %
PACKAGING (1)
MODEL
WSLF2512
REEL
TAPE WIDTH
12 mm/embossed plastic
DIAMETER
330 mm / 13"
PIECES/REEL
4000
CODE
EA
Notes
• Embossed carrier tape per EIA-481
(1)
Additional packaging details at
www.vishay.com/doc?20051
Revision: 18-Sep-2018
Document Number: 30193
3
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.
© 2017 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED
Revision: 08-Feb-17
1
Document Number: 91000
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