WSL3921, WSL5931
www.vishay.com
Vishay Dale
Power Metal Strip
®
Resistors,
Low Value (down to 0.0002
),
Surface Mount
FEATURES
• All welded construction of the Power Metal
Available
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
0.0002
• Construction is unaffected by high sulfur
environments
• Solid metal iron-chrome or manganese-copper
alloy resistive element with low TCR
(< 20 ppm/°C)
• Very low inductance 0.5 nH to 5 nH
• Low thermal EMF (< 3 μV/°C)
• AEC-Q200 qualified
(1)
• Material categorization: for definitions of compliance
please see
www.vishay.com/doc?99912
DESIGN SUPPORT TOOLS
Models
Available
Design Tools
click logo to get started
Available
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
WSL3921
WSL5931
SIZE
3921
5931
POWER RATING
TOLERANCE
P
70 °C
%
W
3.0
5.0
1.0, 5.0
1.0, 5.0
RESISTANCE
VALUE RANGE
0.2m to 4m
0.2m to 3m
RESISTANCE VALUES
CURRENTLY AVAILABLE
(1)
0.2m, 0.3m, 0.5m, 0.7m, 1m, 1.5m, 2m, 2.5m,
3m, 4m
0.2m, 0.3m, 0.5m, 1m, 2m, 3m
WEIGHT
(typical)
g/1000 pieces
281
398
Note
(1)
Other values may be available, contact factory
TECHNICAL SPECIFICATIONS
PARAMETER
Component temperature coefficient
(including terminal)
(1)
Element TCR
(2)
Operating temperature range
Maximum working voltage
(3)
UNIT
ppm/°C
ppm/°C
°C
V
RESISTOR CHARACTERISTICS
WSL3921
WSL5931
± 225 for 0.2 m
± 175 for 0.2 m to 0.7 m
± 175 for 0.3 m and 0.5 m
± 75 for 1 m to 4 m
± 75 for 1 m to 4 m
< 20
-65 to +170
(P x
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; refer to item 1 in the construction illustration on the following page
(3)
Maximum working voltage - the WSL is not voltage sensitive, but is limited by power / energy dissipation and is also not ESD sensitive
GLOBAL PART NUMBER INFORMATION
GLOBAL PART NUMBERING: WSL3921L5000FEA (WSL3921, 0.0005
,
± 1 %)
(visit
www.vishay.net
Vishay Dale parts numbering manual for all options)
W
S
L
3
9
2
1
L
5
0
0
0
F
E
A
SPECIAL
(2 digits)
(dash number)
(up to 2 digits)
from
1 to 99
as
applicable
GLOBAL MODEL
(7 digits)
WSL3921
WSL5931
RESISTANCE VALUE
(5 digits)
L
= m
L5000
= 0.0005
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
Note
(1)
Packaging code: EB (lead (Pb)-free) is a non-standard packaging code that designates a 1000 piece reel size. The non-standard packaging
code is identical to our standard EA (lead (Pb)-free) packaged code, except that it has a package quantity of 1000 pieces.
Revision: 23-Nov-17
Document Number: 30110
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
WSL3921, WSL5931
www.vishay.com
DIMENSIONS
in inches (millimeters)
Vishay Dale
H
L
D
1
W
3
2
T
Typical sensing traces
I
b
d
1) Resistive element: Fe-Cr
(element material used is
dependent on resistance
value)
2) Terminal:
Solid
copper
3) Terminal / element weld
Notes
• 3D models available: 3921 model
www.vishay.com/doc?30315;
5931 model
www.vishay.com/doc?30317
• Surface mount solder profile recommendations:
www.vishay.com/doc?31052
MODEL
WSL3921
WSL5931
GLOBAL
MODEL
L
0.394 ± 0.010
(10.0 ± 0.254)
0.591 ± 0.010
(15.0 ± 0.254)
DIMENSIONS
in inches (millimeters)
W
H
0.205 ± 0.010
0.020
(5.20 ± 0.254)
(0.5)
0.305 ± 0.010
0.020
(7.75 ± 0.254)
(0.5)
T
0.080 ± 0.010
(2.00 ± 0.254)
0.157 ± 0.010
(4.00 ± 0.254)
SOLDER PAD DIMENSIONS
in inches (millimeters)
d
b
l
0.106 ± 0.010
0.244 ± 0.010
0.220 ± 0.005
(2.70 ± 0.254)
(6.20 ± 0.254)
(5.60 ± 0.13)
0.205 ± 0.010
0.344 ± 0.010
0.220 ± 0.005
(5.20 ± 0.254)
(8.75 ± 0.254)
(5.60 ± 0.13)
“D” THICKNESS
(INCHES)
ELEMENT
MATERIAL
RESISTANCE VALUE
(m)
WSL3921
0.2
0.0560
Mn-Cu-Sn
WSL3921
0.3
0.0510
Mn-Cu
WSL3921
0.5
0.0300
Mn-Cu
WSL3921
1.0
0.0150
Mn-Cu
WSL3921
1.5
0.0360
Fe-Cr
WSL3921
2.0
0.0270
Fe-Cr
WSL3921
3.0
0.0170
Fe-Cr
WSL3921
4.0
0.0130
Fe-Cr
WSL5931
0.2
0.0485
Mn-Cu
WSL5931
0.3
0.0300
Mn-Cu
WSL5931
0.5
0.0180
Mn-Cu
WSL5931
1.0
0.0330
Fe-Cr
WSL5931
2.0
0.0155
Fe-Cr
WSL5931
3.0
0.0105
Fe-Cr
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
TYPICAL THERMAL
RESISTANCE
(°C/W)
(1)
2.66
3.8
5.8
10.9
8.24
12.0
20.7
22.8
2.4
3.5
5.7
7.2
13.2
19.3
DERATING - AMBIENT TEMPERATURE
Rated Power in %
120
100
80
60
40
20
0
-65 -50
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
Revision: 23-Nov-17
Document Number: 30110
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
WSL3921, WSL5931
www.vishay.com
Vishay Dale
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, 1000 cycles, 15 min at each extreme
5x rated power for 5 s
-65 °C for 24 h
1000 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
1000 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
± 1.0 %
± 0.5 %
± 0.5 %
± 1.0 %
± 0.5 %
± 0.5 %
± 0.5 %
± 1.0 %
± 0.5 %
± 0.5 %
PACKAGING
REEL
MODEL
TAPE WIDTH
WSL3921
WSL5931
16 mm/embossed plastic
24 mm/embossed plastic
DIAMETER
330 mm/13"
330 mm/13"
PIECES/REEL
3000
1500
CODE
EA
EA
Notes
• Embossed carrier tape per EIA-481
(1)
Additional packaging details at
www.vishay.com/doc?20051
Revision: 23-Nov-17
Document Number: 30110
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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