WSMS2908
www.vishay.com
Vishay Dale
Power Metal Strip
®
Meter Shunt Resistor,
Very Low Value (down to 0.0001
Ω)
FEATURES
• High power to resistor size ratio
• 5-terminal connection design
• Use for single or multi-phase energy meters
• Proprietary processing technique produces
extremely low resistance values
• All welded construction
• Very low inductance (< 5 nH)
• Low thermal EMF (< 3 μV/°C)
• AEC-Q200 qualified
• Material categorization: for definitions of compliance
please see
www.vishay.com/doc?99912
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL
MODEL
WSMS2908
SIZE
2908
POWER RATING
P
70 °C
W
3.0
TOLERANCE
%
5.0
RESISTANCE VALUE
RANGE
Ω
50μ to 1000μ
RESISTANCE VALUES
CURRENTLY AVAILABLE
(1)
Ω
100μ, 250μ, 300μ, 430μ, 500μ
WEIGHT
(typical)
g/1000 pieces
2100
Note
(1)
Other values may be available, contact factory
TECHNICAL SPECIFICATIONS
PARAMETER
Temperature coefficient
Operating temperature range
Maximum current rating
UNIT
ppm/°C
°C
A
RESISTOR CHARACTERISTICS
± 1100 for 100 μΩ, ± 300 for 250 μΩ,
± 225 for 300 μΩ, ± 175 for 430 μΩ and 500 μΩ
-65 to +170
(P/R)
1/2
GLOBAL PART NUMBER INFORMATION
GLOBAL PART NUMBERING: WSMS2908L1000JE (WSMS2908, 0.0001
Ω,
± 5 %, tape / reel)
W
S
M
S
2
9
0
8
L
1
0
0
0
J
E
SPECIAL
(dash number)
(up to 2 digits)
from
1 to 99
as
applicable
GLOBAL MODEL
WSMS2908
RESISTANCE VALUE
L
= mΩ
L1000
= 0.00010
Ω
L2500
= 0.00025
Ω
L3000
= 0.00030
Ω
L4300
= 0.00043
Ω
L5000
= 0.00050
Ω
TOLERANCE CODE
J
= ± 5.0 %
PACKAGING CODE
K
= bulk pack
E
= tape and reel
Revision: 11-Aug-17
Document Number: 30160
1
For technical questions, contact:
ww2cresistors@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
WSMS2908
www.vishay.com
DIMENSIONS
in inches (millimeters)
0.453 (11.5)
0.118 (3.0)
0.157 (4.0)
0.059 (1.5)
0.142 (3.6)
Vishay Dale
0.110 (2.8)
0.315 (8.0)
0.157 (4.0)
B
90° ± 2.0°
A
Ø 0.165 (Ø 4.2)
2 PLACES
0.787 (20.0)
CALIBRATION NOTCH
1.142 (29.0) ± 0.010
TERMINAL THICKNESS 0.040 (1.0)
ALL VALUES
DERATING
Rated Power in %
120
100
80
60
40
20
0
- 65 - 50 - 25
TOLERANCES ON DECIMALS
.XXX ± 0.005 [.x ± 0.1]
UNLESS OTHERWISE LISTED
RESISTANCE
VALUE
(μΩ)
100
250
300
0
25
50
75
70
100 125 150 175
Ambient Temperature in °C
A
DIMENSION
(inches)
0.040
0.059
0.051
0.038
0.033
B
DIMENSION
(inches)
0.080
0.276
0.276
0.315
0.315
ELEMENT
MATERIAL
Mn-Cu
Mn-Cu
Mn-Cu
Mn-Cu
Mn-Cu
430
500
PERFORMANCE
TEST
Thermal shock
Short time overload
Low temperature storage
High temperature exposure
Bias humidity
Mechanical shock
Vibration
Load life
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”
MIL-STD-202, method 106, 0 % power, 7b not required
TEST LIMITS
± 0.5 %
ΔR
± 0.5 %
ΔR
± 0.5 %
ΔR
± 1.0 %
ΔR
± 0.5 %
ΔR
± 0.5 %
ΔR
± 0.5 %
ΔR
± 1.0 %
ΔR
± 0.5 %
ΔR
Revision: 11-Aug-17
Document Number: 30160
2
For technical questions, contact:
ww2cresistors@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
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Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for
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© 2017 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED
Revision: 08-Feb-17
1
Document Number: 91000
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