Datasheet

WFM
www.vishay.com
Vishay Dale
Revision: 21-Aug-2019
2
Document Number: 30387
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Notes
(1)
Element TCR - only applies to the alloy used for the resistor element
(2)
Component TCR - total TCR that includes the TCR effects of the resistor element and the copper terminal
(3)
Maximum working voltage - the WFM is not voltage sensitive, but is limited by power / energy dissipation and is also not ESD sensitive
DIMENSIONS
TECHNICAL SPECIFICATIONS
PARAMETER UNIT MODEL
RESISTOR CHARACTERISTICS
2010 2512
Temperature coefficient
(20 °C to 60 °C)
(element only)
(1)
ppm/°C All < 20
Operating temperature range °C All -65 to +170
Maximum working voltage
(3)
VAll (P x R)
1/2
Maximum terminal temperature °C All 110 95
Temperature coefficient
(-55 °C to +150 °C)
(including terminals)
(2)
ppm/°C
WFMA ± 110 ± 110
WFMB ± 50 ± 50
Temperature coefficient
(20 °C to 60 °C)
(including terminals)
(2)
ppm/°C
WFMA
± 50  10 m
± 30 > 10 m
± 40
WFMB ± 20 ± 20
CASE
SIZE
RESISTANCE
RANGE
(
m)
DIMENSIONS in inches (millimeters)
SOLDER PAD DIMENSIONS
in inches (millimeters)
L W H T1 T2 a b l
2010 5 to 500
0.200 ± 0.008
(5.08 ± 0.20)
0.100 ± 0.008
(2.54 ± 0.20)
0.020 ± 0.006
(0.50 ± 0.15)
0.028 ± 0.008
(0.70 ± 0.20)
0.016 ± 0.006
(0.40 ± 0.15)
0.049
(1.25)
0.118
(3.00)
0.138
(3.50)
2512 10 to 500
0.250 ± 0.012
(6.35 ± .30)
0.125 ± 0.008
(3.18 ± .20)
0.020 ± 0.006
(0.50 ± 0.15)
0.035 ± 0.008
(0.90 ± 0.20)
0.020 ± 0.008
(0.50 ± 0.20)
0.061
(1.55)
0.142
(3.60)
0.173
(4.40)
PRODUCT
RESISTANCE RANGE
(
)
THERMAL RESISTANCE
(°C/W)
ALLOY
WFMA2010 0.005 to 0.0329 < 30 Mn-Cu
WFMB2010 0.033 to 0.5 < 55 Ni-Cr
WFMA2512 0.01 to 0.0329 < 25 Mn-Cu
WFMB2512 0.033 to 0.5 < 40 Ni-Cr
l
b
a
Typical sensing traces
T1H
T2
L
W