WSMS2908 Datasheet

WSMS2908
www.vishay.com
Vishay Dale
Power Metal Strip® Meter Shunt Resistor,
Very Low Value (down to 0.0001 )
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
SIZE
POWER RATING
P70 °C
W
TOLERANCE
%
RESISTANCE VALUE
RANGE

RESISTANCE VALUES
CURRENTLY AVAILABLE (1)

WEIGHT
(typical)
g/1000 pieces
WSMS2908
2908
3.0
5.0
50μ to 1000μ
100μ, 250μ, 300μ, 430μ, 500μ
2100
Note
(1) Other values may be available, contact factory
TECHNICAL SPECIFICATIONS
PARAMETER
UNIT
RESISTOR CHARACTERISTICS
ppm/°C
± 1100 for 100 μ, ± 300 for 250 μ,
± 225 for 300 μ, ± 175 for 430 μ and 500 μ
Operating temperature range
°C
-65 to +170
Maximum current rating
A
(P/R)1/2
Temperature coefficient
GLOBAL PART NUMBER INFORMATION
GLOBAL PART NUMBERING: WSMS2908L1000JE (WSMS2908, 0.00025 , ± 5 %)
W
S
M
S
2
9
0
8
L
1
0
0
0
J
E
GLOBAL MODEL
RESISTANCE VALUE
TOLERANCE CODE
PACKAGING CODE
SPECIAL
WSMS2908
L = m
L1000 = 0.00010 
L2500 = 0.00025 
L3000 = 0.00030 
L4300 = 0.00043 
L5000 = 0.00050 
J = ± 5.0 %
K = bulk pack
E = tape and reel
(Dash number)
(Up to 2 digits)
From 1 to 99 as
applicable
Revision: 24-Mar-16
Document Number: 30160
1
For technical questions, contact: [email protected]
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
Vishay Dale
DIMENSIONS in inches (millimeters)
0.157 (4.0)
0.453 (11.5)
0.142 (3.6)
0.059 (1.5)
0.118 (3.0)
0.110 (2.8)
0.315 (8.0)
90° ± 0.2°
B
0.157 (4.0)
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
Rated Power in %
DERATING
TOLERANCES ON DECIMALS
XXX ± 0.005
120
100
80
60
RESISTANCE
VALUE
(μ)
A
DIMENSION
(inches)
B
DIMENSION
(inches)
ELEMENT
MATERIAL
100
0.040
0.080
Mn-Cu
250
0.059
0.276
Mn-Cu
300
0.051
0.276
Mn-Cu
430
0.038
0.315
Mn-Cu
500
0.033
0.315
Mn-Cu
40
20
0
- 65 - 50 - 25
0
25
50
75
70
100 125 150 175
Ambient Temperature in °C
PERFORMANCE
TEST
CONDITIONS OF TEST
TEST LIMITS
Thermal shock
-55 °C to +150 °C, 1000 cycles, 15 min at each extreme
± 0.5 % R
Short time overload
5 x rated power for 5 s
± 0.5 % R
Low temperature operation
-65 °C for 45 min
± 0.5 % R
High temperature exposure
1000 h at +170 °C
± 1.0 % R
Bias humidity
+85 °C, 85 % RH, 10 % bias, 1000 h
± 0.5 % R
Mechanical shock
100 g’s for 6 ms, 5 pulses
± 0.5 % R
Vibration
Frequency varied 10 Hz to 2000 Hz in 1 min, 3 directions, 12 h
± 0.5 % R
Load life
1000 h at +70 °C, 1.5 h “ON”, 0.5 h “OFF”
± 1.0 % R
Moisture resistance
MIL-STD-202, method 106, 0 % power, 7b not required
± 0.5 % R
Revision: 24-Mar-16
Document Number: 30160
2
For technical questions, contact: [email protected]
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
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Revision: 02-Oct-12
1
Document Number: 91000