WSLT4026
www.vishay.com
Vishay Dale
Power Metal Strip® Resistors, High Temperature (275 °C),
High Power, Low Value, Surface Mount, 4-Terminal
FEATURES
• 4-terminal design allows for 1 % tolerance down
to 0.002 Ω
• High power-to-footprint size ratio
• All welded construction of the Power Metal Strip
resistors are ideal for all types of current
sensing, voltage division, and pulse applications
• Proprietary processing technique produces
extremely low resistance values, down to
0.0005 Ω
• Sulfur resistance by construction that is unaffected by
high sulfur environments
• Solid metal nickel-chrome resistive element with low TCR
(< 20 ppm/°C)
LINKS TO ADDITIONAL RESOURCES
• Very low inductance 0.5 nH to 5 nH
3D 3D
3D Models
• Low thermal EMF (< 3 μV/°C)
Design Tools
• 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
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL
MODEL
SIZE
POWER RATING
P70 °C
W
TOLERANCE
±%
RESISTANCE
VALUE RANGE
Ω
RESISTANCE VALUES
CURRENTLY AVAILABLE (1)
Ω
WEIGHT
(typical)
g/1000 pieces
WSLT4026
4026
3.0
1.0
0.3m to 5m
1.3m, 2m, 3m, 4m, 5m
420
Notes
• Power rating depends on the max. temperature at the solder point, component placement density and the substrate material
• Part marking: model, value, tolerance, date code
(1) Other values may be available, contact factory
GLOBAL PART NUMBER INFORMATION
Global Part Numbering Example: WSLT40265L000FEA (WSLT4026, 0.005 Ω, ± 1 %)
W
S
L
T
4
0
2
6
5
L
0
0
0
F
E
A
GLOBAL MODEL
(8 digits)
RESISTANCE VALUE
(5 digits)
TOLERANCE CODE
(1 digits)
PACKAGING CODE (1)
(2 digits)
SPECIAL (2)
(up to 2 digits)
WSLT4026
L = mΩ
2L000 = 0.002 Ω
3L000 = 0.003 Ω
4L000 = 0.004 Ω
5L000 = 0.005 Ω
F = ± 1.0 %
EA = lead (Pb)-free, tape / reel
EK = lead (Pb)-free, bulk
(dash number)
(up to 2 digits)
from 1 to 99 as
applicable
Notes
(1) Packaging code: EB (lead (Pb)-free) and TB (tin / lead) are non-standard packaging codes designating 1000 piece reels. These non-standard
packaging codes are identical to our standard EA (lead (Pb)-free) and TA (tin / lead), except that they have a package quantity of 1000 pieces
(2) Follow link for customization capabilities: www.vishay.com/doc?48163
Revision: 17-Sep-2020
Document Number: 30186
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
WSLT4026
www.vishay.com
Vishay Dale
TECHNICAL SPECIFICATIONS
PARAMETER
Component temperature coefficient (including terminal)
(1)
Element TCR (2)
Operating temperature range
Maximum working voltage
(3)
UNIT
RESISTOR CHARACTERISTICS
ppm/°C
± 75 over temperature of +20 °C to +60 °C
ppm/°C
< 20
°C
-65 to +275
V
(P/R)1/2
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 WSHM is not voltage sensitive, but is limited by power / energy dissipation and is also not ESD sensitive
DIMENSIONS in inches (millimeters)
W
L
c
T
d
b
U
S
a
w
R
b
N
H
Notes
• 3D models available: www.vishay.com/doc?30320
• Surface mount solder profile recommendations: www.vishay.com/doc?31052
DIMENSIONS
MODEL
WSLT4026
L
R
(REF.)
H
0.400 ± 0.008 0.260 + 0.012/- 0.008 0.117 ± 0.008
(10.1 ± 0.2)
(6.6 + 0.3/- 0.2)
(3.0 ± 0.2)
S
0.198
(5.0)
T
U
N
0.028 ± 0.004 0.016 ± 0.002 0.078 ± 0.004 0.039 ± 0.006
(0.7 ± 0.1)
(0.4 ± 0.05)
(2.0 ± 0.1)
(0.99 ± 0.15)
SOLDER PAD DIMENSIONS
MODEL
WSLT4026
MODEL
W
a
b
c
d
w
0.220
(5.6)
0.096
(2.44)
0.035
(0.89)
0.035
(0.89)
0.420
(10.6)
RESISTANCE VALUE
(mΩ)
THERMAL RESISTANCE (1)
(°C/W)
ELEMENT MATERIAL
HEIGHT
H
1.3
11
Ni-Cr
0.119 ± 0.008 (3.02 ± 0.2)
WSLT4026
2.0
16
Ni-Cr
0.114 ± 0.008 (2.9 ± 0.2)
3.0
19
Ni-Cr
0.110 ± 0.008 (2.79 ± 0.2)
4.0
22
Ni-Cr
0.110 ± 0.008 (2.79 ± 0.2)
5.0
38
Ni-Cr
0.110 ± 0.008 (2.79 ± 0.2)
Note
(1) The full power rating of Power Metal Strip resistors are dependent upon the ability of the circuit board to dissipate the heat energy created
in the resistance element. It is recommended to follow common design practices for power semiconductors that ensure the junction
temperature is maintained with in thermal limits by using large pad surfaces, thermal vias, heavier copper weights, internal layers as well as
other thermal spreading features. The thermal resistance values provided function in the same manner as junction to terminal temperature
Revision: 17-Sep-2020
Document Number: 30186
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
WSLT4026
www.vishay.com
Vishay Dale
DERATING
Axis Title
10000
120
1000
80
1st line
2nd line
2nd line
Rated Power (%)
100
60
100
40
20
0
-65
-25
25
125 175 225
70
Ambient Temperature (°C)
10
275
PULSE CAPABILITY
click to get started
VE
TI
A
R
ST
U
ILL
S
SE
O
RP
PU
LY
ON
www.vishay.com/resistors/power-metal-strip-calculator
PERFORMANCE
TEST
CONDITIONS OF TEST
TEST LIMITS
Thermal shock
-55 °C to +150 °C, 1000 cycles, 15 min at each extreme
± 0.5 %
Short time overload
0.3 mΩ, 0.5 mΩ, 2 mΩ and 3 mΩ - 5 x rated power for 5 s
4 mΩ and 5 mΩ - 3 x rated power for 5 s
± 0.5 %
Low temperature operation
-65 °C for 24 h
± 0.5 %
High temperature exposure
1000 h at +275 °C
± 1.0 %
Bias humidity
+85 °C, 85 % RH, 10 % bias, 1000 h
± 0.5 %
Mechanical shock
100 g’s for 6 ms, 5 pulses
± 0.5 %
Vibration
Frequency varied 10 Hz to 2000 Hz in 1 min, 3 directions, 12 h
± 0.5 %
Load life
1000 h at +70 °C, 1.5 h “ON”, 0.5 h “OFF”
± 1.0 %
Resistance to solder heat
+260 °C solder, 10 s to 12 s dwell, 25 mm/s emergence
± 0.5 %
Moisture resistance
MIL-STD-202, method 106, 0 % power, 7b not required
± 0.5 %
Revision: 17-Sep-2020
Document Number: 30186
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
WSLT4026
www.vishay.com
Vishay Dale
PACKAGING
REEL
MODEL
WSLT4026
TAPE WIDTH
DIAMETER
PIECES/REEL
CODE
24 mm / embossed plastic
330 mm / 13"
1500
EA
Notes
• Embossed carrier tape per EIA-481
• Additional packaging details at www.vishay.com/doc?20051
REEL ORIENTATION
Revision: 17-Sep-2020
Document Number: 30186
4
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.
Hyperlinks included in this datasheet may direct users to third-party websites. These links are provided as a convenience and
for informational purposes only. Inclusion of these hyperlinks does not constitute an endorsement or an approval by Vishay of
any of the products, services or opinions of the corporation, organization or individual associated with the third-party website.
Vishay disclaims any and all liability and bears no responsibility for the accuracy, legality or content of the third-party website
or for that of subsequent links.
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.
© 2021 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED
Revision: 09-Jul-2021
1
Document Number: 91000