WSR High Power
www.vishay.com
Vishay Dale
Power Metal Strip® Resistors,
Low Value (Down to 0.001 Ω), Surface Mount
FEATURES
• Molded high temperature encapsulation
• Improved thermal management incorporated
into design
• 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
0.001 Ω)
Available
• Sulfur resistance by construction that is
unaffected by high sulfur environments
Available
• Solid metal nickel-chrome or manganesecopper alloy resistive element with low TCR
Available
(< 20 ppm/°C)
• Very low inductance 0.5 nH to 5 nH
• Low thermal EMF (< 3 μV/°C)
• Integral heat sink not utilized for resistance values less
than 0.0075 Ω
• AEC-Q200 qualified (1)
• Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
LINKS TO ADDITIONAL RESOURCES
3D 3D
3D Models
Design Tools
Notes
* 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
• 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
RESISTANCE VALUE RANGE
Ω
GLOBAL
MODEL
SIZE
POWER RATING
P70 °C
W
TOL. ± 0.5 %
TOL. ± 1.0 %
WEIGHT
(typical)
g/1000 pieces
WSR5
4527
5.0 (1)
0.01 to 0.3
0.001 to 0.3
476
Notes
• Part marking: DALE, model, value, tolerance, date code
(1) The WSR5 is rated at 5 W with terminal temperature maintained ≤ 120 °C
GLOBAL PART NUMBER INFORMATION
Global Part Numbering Example: WSR5R0100FEA (preferred part numbering format)
(visit www.vishay.net Vishay Dale parts numbering manual for all options)
W
S
R
5
R
0
1
0
0
F
E
A
GLOBAL MODEL
RESISTANCE VALUE (1)
TOLERANCE CODE
PACKAGING CODE (2)
SPECIAL (3)
WSR5
L = mΩ*
R = decimal
5L000 = 0.005 Ω
R0100 = 0.01 Ω
* use “L” for resistance
values < 0.01 Ω
D = ± 0.5 %
F = ± 1.0 %
J = ± 5.0 %
EA = lead (Pb)-free, tape / reel
EK = lead (Pb)-free, bulk
(dash number)
(up to 2 digits)
from 1 to 99 as
applicable
TA = tin / lead, tape / reel (R86)
BA = tin / lead, bulk (B43)
Notes
(1) WSR marking (www.vishay.com/doc?30327)
(2) 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
(3) Follow link for customization capabilities: www.vishay.com/doc?48163
Revision: 29-Jun-2021
Document Number: 31059
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
WSR High Power
www.vishay.com
Vishay Dale
TECHNICAL SPECIFICATIONS
PARAMETER
UNIT
WSR5 RESISTOR CHARACTERISTICS
± 75 for 0.01 Ω to 0.3 Ω
± 110 for 0.005 Ω to 0.0099 Ω
Temperature coefficient
measured from -55 °C to +150 °C
± 300 for 0.004 Ω to 0.0049 Ω
ppm/°C
± 450 for 0.003 Ω to 0.0039 Ω
± 600 for 0.002 Ω to 0.0029 Ω
± 750 for 0.001 Ω to 0.0019 Ω
Element TCR
ppm/°C
< 20
VAC
> 500
Insulation resistance
Ω
> 109
Operating temperature range
°C
-65 to +275
Maximum working voltage
V
(P x R)1/2
Dielectric withstanding voltage
DIMENSIONS in inches (millimeters)
H
W
I
W1
T
b
a
L
Notes
• 3D models available: www.vishay.com/doc?30342
• Surface mount solder profile recommendations: www.vishay.com/doc?31052
DIMENSIONS
MODEL
WSR5
L
H
0.455 ± 0.032 0.095 ± 0.005
(11.56 ± 0.813) (2.41 ± 0.127)
SOLDER PAD DIMENSIONS
T
W
W1
a
b
l
0.100 ± 0.010
(2.54 ± 0.254)
0.275 ± 0.005
(6.98 ± 0.127)
0.215 ± 0.005
(5.46 ± 0.127)
0.155
(3.94)
0.230
(5.84)
0.205
(5.21)
Note
• Sensing locations are based on the construction of the part; terminals are wrapped from the outside to underneath. These options place the
sensing location nearest the temperature stable resistance element, which minimizes contact resistance and optimizes TCR
TYPICAL SENSING LAYOUT
a
a
c
b
l
c
a
b
c
l
0.155
(3.94)
0.230
(5.84)
0.020
(0.51)
0.205
(5.21)
Revision: 29-Jun-2021
Document Number: 31059
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
WSR High Power
www.vishay.com
Vishay Dale
Rated Power in %
DERATING
PULSE CAPABILITY
120
100
click to get started
80
60
40
20
0
- 65
- 25
25
75
70
125
175
225
US
ILL
275
E
IV
AT
R
T
ES
OS
P
R
PU
LY
ON
Ambient Temperature °C
www.vishay.com/resistors/power-metal-strip-calculator
PERFORMANCES
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
3 x rated power for 5 s
± 2.0 %
Low temperature storage
-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
± 2.0 %
Resistance to solder heat
260 ± 3 °C 10 s to 12 s dwell, 25 mm/s emergence
± 0.5 %
Moisture resistance
MIL-STD-202, method 106, 0 % power, 7a and 7b not required
± 0.5 %
PACKAGING
(1)
REEL
MODEL
WSR5
TAPE WIDTH
DIAMETER
PIECES/REEL
CODE
24 mm / embossed plastic
330 mm / 13"
1500
EA
Notes
• Embossed carrier tape per EIA-481
(1) Additional packaging details at www.vishay.com/doc?20051
Revision: 29-Jun-2021
Document Number: 31059
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
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Revision: 01-Jan-2022
1
Document Number: 91000