Datasheet

WFM
www.vishay.com
Vishay Dale
Revision: 21-Aug-2019
1
Document Number: 30387
For technical questions, contact: [e-mail]
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
Power Metal Plate™ Current Sense Resistors,
Low Value (5 m to 500 m), Surface-Mount, High Power
ADDITIONAL RESOURCES
FEATURES
• 2010 and 2512 size package
• Ideal for all types of current sensing and
pulse applications including switching and
linear power supplies, instruments, power
amplifiers, shunts, power inverters, and
battery management
• Proprietary processing technique produces
low resistance values (5
m to 500 m)
• Solid metal manganese-copper and nickel-
chromium-aluminum alloy resistive element
with low TCR (< 20 ppm/ºC)
• Very low inductance 0.5 nH to 5 nH
• Low thermal EMF (< 3 μV/°C)
• AEC-Q200 qualified
(1)
• PATENT(S): www.vishay.com/patents
• Material categorization: for definitions of compliance
please see
www.vishay.com/doc?99912
Note
(1)
Flame retardance test may not be applicable to some resistor
technologies
Note
(1)
Terminal temperature
Notes
(1)
Resistance values available according to WSL decade values (www.vishay.com/doc?30117)
(2)
Packaging code: EB (lead (Pb)-free) is a non-standard packaging code designating 1000 piece reels. This non-standard packaging code is
identical to our standard EA (lead (Pb)-free), except that it has a package quantity of 1000 pieces
PATENT(S): www.vishay.com/patents
This Vishay product is protected by one or more United States and international patents.
3
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3
D
D
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3
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3D Models
Did You
Know
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL 
MODEL
SIZE
POWER RATING
(1)
W
TOLERANCE
%
RESISTANCE
VALUE RANGE

WEIGHT
(typical)
g/1000 pieces
WFMA2010 2010 2.0 at 110 °C ± 1.0 0.005 to 0.0329 32
WFMB2010 2010 2.0 at 110 °C ± 1.0 0.033 to 0.500 32
WFMA2512 2512 3.0 at 95 °C ± 1.0 0.010 to 0.0329 41
WFMB2512 2512 3.0 at 95 °C ± 1.0 0.033 to 0.500 41
GLOBAL PART NUMBER INFORMATION
Global Part Numbering example: WFMB2512R5000FEA
GLOBAL
MODEL
(3 digits)
ELEMENT
MATERIAL
(1 digit)
CASE SIZE
(4 digits)
RESISTANCE
VALUE
(1)
(5 digits)
TOLERANCE
CODE
(1 digit)
PACKAGING
CODE
(2)
(2 digits)
SPECIAL
(2 digits)
WFM A = CuMn
B = NiCrAl
2010
2512
L = m*
R = decimal
5L000 = 0.005 
R0100 = 0.01 
* Use “L” for
resistance
values < 0.01 
F = ± 1.0 %
J = ± 5.0 %
EA =
lead (Pb)-free,
tape / reel
EK =
lead (Pb)-free,
bulk
Dash numbers
1 thru 99
as applicable
F M B 2 5 1 2 R 5 0 0 0 F E AW