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Home » NEWEST Products » New by Manufacturer » Vishay » Vishay Current Sense Resistors
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Home » Product Knowledge Center » Vishay Current Sensing Resistors

Vishay / Dale Current Sensing Resistors

The Vishay / Dale Current Sensing Resistors are SMT, fixed, discrete resistors available in a wide range of package sizes with low resistance and in a variety of temperature performances and temperature coefficients.

Series:

WSK Series- NEW!

WSK0612 Series Power Metal Strip® Resistors, High Power, Surface Mount, 4-Terminal

Vishay WSK0612 Series Power Metal Strip® Resistors

Features

  • 4-Terminal design
  • Ideal for all types of current sensing, voltage division and pulse applications
  • Proprietary processing technique produces extremely low resistance values
  • Durable with all-welded construction
  • Low thermal EMF (<3µV/ºC)
  • Solid metal nickel-chrome or manganese-copper resistive element with low TCR (<20 ppm/ºC)
  • Compliant to RoHS Directive 2002/95/EC
  • AEC-Q200 qualified available (1)
Note
(1) Flame retardance test may not be applicable to some resistor technologies.

 

WSK0612 SMT Named as Top-10 Power Product by Electronic Products China Magazine.
Learn More

Standard Electrical Specifications

Global Model
Size
Power Rating
P 70 ºC
W
Tolerance
± %
Resistance Value
Range
Ω
Resistance Values
Currently Available (2)
Ω
WSK0612 0612 1.0 1.0 0.50m to 5.0m
0.5m, 0.75m, 1m, 2m, 3m, 4m, 5m
(2) Other values may be available. Contact factory.



WSLS Series

WSLS Series Power Metal Strip® Resistors, Improved Stability

Vishay WSLS Power Metal Strip Resistors
Features
  • Current sensing in high-temperature (+ 125 °C) applications
  • Greater stability with maximum resistance change of 0.25 % or 0.5 % through 2000 h workload
  • Ideal for all types of current sensing, voltage division and pulse applications including switching and linear power supplies, instruments, power amplifiers and shunts
  • Proprietary processing technique produces extremely low resistance values (0.01 Ω to 0.1 Ω)
  • All welded construction
  • Solid metal nickel-chrome resistive element with low TCR (< 20 ppm/°C)
  • Very low inductance 0.5 nH to 2 nH
  • Excellent frequency response to 50 MHz
  • Low thermal EMF (< 3 μV/°C)
  • AEC-Q200 qualified (1)
  • Compliant to RoHS Directive 2002/95/EC

(1) Flame retardence test may not be applicable to some resistor technologies
Standard Electrical Specifications
GLOBAL MODEL
SIZE
POWER RATING P 70ºC W
TOLERANCE
±%
RESISTANCE
VALUE RANGE
Ω
WEIGHT
(typical)
g/1000 pieces
WSLS2512 2512 1.0 0.5, 1.0, 5.0 0.01 to 0.1 63.6

Technical Specifications
WSLS Series Power Current Sensing Resistors Technical Specifications

Performance
WSLS Series Power Current Sensing Resistors Performance Specifications

WSLP Series

WSLP Series Power Metal Strip® Resistors
/vishaysuper12/
Vishay WSLP Power Metal Strip Resistors
Features
  • Very high power to foot print size ratio (1 W in 1206, 0.5 W in 0805 and 0.4 W in 0603 package)
  • Ideal for all types of current sensing and pulse applications including switching and linear power supplies, instruments, power amplifiers and shunts
  • Proprietary processing technique produces extremely low resistance values (down to 0.001 Ω)
  • All welded construction
  • Solid metal nickel-chrome or manganese-copper alloy resistive element with low TCR (< 20 ppm/°C)
  • Very low inductance 0.5 nH to 5 nH
  • Excellent frequency response to 50 MHz
  • Low thermal EMF (< 3 μV/°C)
  • AEC-Q200 qualified available (1)
  • Compliant to RoHS Directive 2002/95/EC

(1) Flame retardence test may not be applicable to some resistor technologies
Standard Electrical Specifications
GLOBAL MODEL
SIZE
POWER RATING P 70ºC W
RESISTANCE RANGE Ω
± 1.0% ± 0.5%
WSLP0603 0603
0.4
0.015 to 0.1
0.01 to 0.1
WSLP0805 0805
0.5
0.01 to 0.05
0.01 to 0.05
WSLP1206 1206
1.0
0.01 to 0.05
0.001 to 0.05
WSLP3921 3921 5.0 2m to 4m 0.5m to 1m
WSLP5931
5931 7.0 1m to 3m 0.3m to 0.5m
WSLP2010
 2010
2.0
0.001 to 0.01
0.004 to 0.01 
WSLP2726
Learn More
2726
7.0
0.5m to 1m
0.5m to 1m
WSLP4026
Learn More
4026
7.0
0.5m to 1m
0.5m to 1m

Technical Specifications


Performance

WSL Series

WSL Series Power Metal Strip® Resistors
/vishaysuper12/
Vishay WSL Power Metal Strip Resistors Features
  • Ideal for all types of current sensing , voltage division and pulse applications including switching and linear power supplies , instruments, power amplifiers
  • Proprietary processing technique produces extremely low resistance values (down to
    0.001 Ω)
  • All welded construction
  • Solderable terminations
  • Solid metal Nickel-Chrome or Manganese-Copper alloy
    resistive element with low TCR (< 20 ppm/°C)
  • Very low inductance 0.5 nH to 5 nH
  • Excellent frequency response to 50 MHz
  • Low thermal EMF (< 3 μV/°C)
  • Compliant to RoHS directive 2002/95/EC
Standard Electrical Specifications
GLOBAL MODEL
POWER RATING P 70ºC W
RESISTANCE RANGE
WEIGHT (typical) g/1000 pieces
± 0.5% ± 1.0%
WSL0603 0.1 0.01 to 0.1
0.01 to 0.1
1.9
WSL0805 0.125 0.01 to 0.2 0.01 to 0.2 4.8
WSL1206 0.25 0.006 to 0.2
0.001 to 0.2
16.2
WSL2010 0.5 0.004 to 0.5
0.001 to 0.5
38.9
WSL2512 1.0 (1) 0.003 to 0.5
0.001 to 0.5
63.6
WSL2816 2.0 0.01 to 0.1
0.01 to 0.1 118
WSL3637 3.0 0.001 to 0.01
0.001 to 0.01 274.3
WSL3921 3.0 0.3, 0.5, 1, 2, 3, 4
281
WSL2726 3.0 0.3, 5m 420
WSL4026 3.0 0.3, 5m 420
WSL5931 5.0 0.2, 0.3, 0.5, 1, 2, 3
398
Notes: (1) for values above 0.1Ω derate linearly to 80% rated power at 0.5Ω
Part marking: value; tolerance: Due to resistor size limitations, some resistors will be marked with only the resistance value.

Technical Specifications


Performance


WSR Series

WSR Series Power Metal Strip® Resistors
Vishay WSR Series
WSR2, WSR3, WSR5 Features
  • Molded high temperature encapsulation
  • Ideal for all types of current sensing , voltage division and pulse applications including switching and linear power supplies , instruments, power amplifiers
  • Proprietary processing technique produces extremely low resistance values (down to0.001 Ω)
  • All welded construction
  • Solid metal Nickel-Chrome or Manganese-Copper alloy resistive element with low TCR (< 20 ppm/°C)
  • Solderable terminations
  • Very low inductance 0.5 nH to 5 nH
  • Excellent frequency response to 50 MHz
  • Low thermal EMF (< 3 μV/°C)
  • Compliant to RoHS directive 2002/95/EC
WSR5 (High Power)
  • Improved thermal management incorporated into design
  • Integral heat sink not utilized for resistance values less than 0.0075Ω


Standard Electrical Specifications
GLOBAL MODEL
SIZE
POWER RATING P 70ºC W
RESISTANCE RANGE Ω
± 1.0% ± 0.5%
WSR2 4527 2.0 0.01 to 1.0
0.001 to 1.0
WSR3 4527 3.0 (1) 0.01 to 0.2
0.001 to 0.2
WSR5 4527 5.0 (2) 0.01 to 0.3 0.001 to 0.3
Notes: (1) The WSR3 requires a minimum of 1050 sq. mil. circuit traces connecting to the recommended solder pad.
Notes: (2) The WSR5 is rated at 5W with terminal temperature maintained ≤ 120ºC.
Part Marking: DALE, Model, Value, Tolerance, Data Code

Technical Specifications
PARAMETER UNIT WSR2 & WSR3
WSR5
Temperature Coefficient
ppm/ºC 0.005Ω to 0.0099Ω = ± 110
0.010Ω to 1.0Ω = ±75
0.0075 Ω to 0.0099 Ω = ± 110
0.01 Ω to 0.3 Ω = ± 75
Dielectric Withstanding Voltage
V AC >500 >500
Insulation Resistance
Ω > 10 9
> 10 9
Operating Temperature Range
ºC -65 to +275
-65 to +275
Maximum Working Voltage
V (P x R) ½
(P x R) ½
Weight/1000 pieces (typical)
g 440 476
Performance
TEST
CONDITIONS OF TEST
TEST LIMITS
WSR2 WSR3 WSR5
Thermal Shock
- 55 °C to + 150 °C, 1000 cycles, 15 min at each extreme ± (0.5 % + 0.0005 Ω) ΔR ± (0.5 % + 0.0005 Ω) ΔR ± (0.5 % + 0.0005 Ω) ΔR
Short Time Overload
WSR2: 5 x rated power for 5 s
WSR3: 4 x rated power for 5 s
WSR5: 3 x rated power for 5 s
± (0.5 % + 0.0005 Ω) ΔR ± (2.0 % + 0.0005 Ω) ΔR ± (2.0 % + 0.0005 Ω) ΔR
Low Temperature Storage
- 65 °C for 24 h ± (0.5 % + 0.0005 Ω) ΔR ± (0.5 % + 0.0005 Ω) ΔR ± (0.5 % + 0.0005 Ω) ΔR
High Temperature Exposure
1000 h at + 275 °C ± (1.0 % + 0.0005 Ω) ΔR ± (1.0 % + 0.0005 Ω) ΔR ± (1.0 % + 0.0005 Ω) ΔR
Bias Humidity
+ 85 °C, 85 % RH, 10 % Bias, 1000 h ± (0.5 % + 0.0005 Ω) ΔR ± (0.5 % + 0.0005 Ω) ΔR ± (0.5 % + 0.0005 Ω) ΔR
Mechanical Shock
100 g's for 6 ms, 5 pulses ± (0.5 % + 0.0005 Ω) ΔR ± (0.5 % + 0.0005 Ω) ΔR ± (0.5 % + 0.0005 Ω) ΔR
Vibration Vibration Frequency varied 10 Hz to 2000 Hz in 1 min, 3 directions, 12 h ± (0.5 % + 0.0005 Ω) ΔR ± (0.5 % + 0.0005 Ω) ΔR ± (0.5 % + 0.0005 Ω) ΔR
Load Life
1000 h at rated power, + 70 °C, 1.5 h "ON", 0.5 h "OFF" ± (1.0 % + 0.0005 Ω) ΔR ± (2.0 % + 0.0005 Ω) ΔR ± (2.0 % + 0.0005 Ω) ΔR
Resistance to Solder Heat
+ 260 °C Solder, 10 s to 12 s dwell, 25 mm/s emergence ± (0.5 % + 0.0005 Ω) ΔR ± (0.5 % + 0.0005 Ω) ΔR ± (0.5 % + 0.0005 Ω) ΔR
Moisture Resistance
MIL-STD-202 Method 106, 0 % power, 7a and 7b not required ± (0.5 % + 0.0005 Ω) ΔR ± (0.5 % + 0.0005 Ω) ΔR ± (0.5 % + 0.0005 Ω) ΔR

WSH Series

WSH2818 Series Power Metal Strip® Resistors , High Power (5 W)
/vishaysuper12/
Vishay WSH2818 High Power Resistors

Features
  • Improved thermal management incorporated into design
  • Ideal for all types of current sensing , voltage division and pulse applications including switching and linear power supplies , instruments, power amplifiers
  • Proprietary processing technique produces extremely low resistance values
  • All welded construction
  • Solid metal Nickel-Chrome or Manganese-Copper alloy resistive element with low TCR (< 20 ppm/°C)
  • Lead (Pb)-free construction
  • Very low inductance (< 5 nH)
  • Excellent frequency response to 50 MHz
  • Low thermal EMF (< 3 μV/°C)
  • Compliant to RoHS directive 2002/95/EC
Vishay Video from YouTube
Short Time Overload

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Technical Specifications
PARAMETER
UNIT
WSH2818
Temperature Coefficient
ppm/ºC
± 200 for 1 mΩ to 5.99 mΩ
± 75 for 6 mΩ to 100 mΩ
Inductance
ηH < 5
Operating Temperature Range
ºC - 65 to + 170
Maximum Continuous Current
A (P/R) 1/2
Weight/1000 pieces
g 126

Standard Electrical Specifications
GLOBAL MODEL
POWER RATING P 70ºC W TOLERANCE RESISTANCE RANGE Ω
WSH2818 5 (1) 1.0 0.001 to 0.1
Notes: (1) The WSH2818 is rated at 5W with maximum surface temperature of 200ºC.

Performance

WSL...18 Series

WSL...18 Series High Power Resistors
Vishay WSL...18 Series
Features
  • Ideal for all types of current sensing , voltage division, and pulse applications including switching and linear power supplies , instruments, power amplifiers
  • Proprietary processing technique produces extremely low resistance values (down to 0.001 Ω)
  • Specially selected and stabilized materials allow for high power ratings (2 x standard WSL rating)
  • All welded construction
  • Solid metal Nickel-Chrome or Manganese-Copper alloy resistive element with low TCR (< 20 ppm/°C)
  • Solderable terminations
  • Very low inductance 0.5 nH to 5 nH
  • Excellent frequency response to 50 MHz
  • Low thermal EMF (< 3 μV/°C)
  • Compliant to RoHS directive 2002/95/EC
Standard Electrical Specifications
GLOBAL MODEL
POWER RATING P 70ºC W
RESISTANCE RANGE Ω
WEIGHT (typical)
g/1000 pieces
± 0.5% ± 1.0%
WSL0603...18 0.20 0.01 to 0.1
0.01 to 0.1
1.9
WSL0805...18 0.25 0.01 to 0.2
0.01 to 0.2
4.8
WSL1206...18 0.5 0.006 to 0.2
0.001 to 0.2
16.2
WSL2010...18 1.0 0.004 to 0.5
0.001 to 0.5
38.9
WSL2512...18 2.0 0.003 to 0.04
0.001 to 0.04
63.6

Technical Specifications


Performance

WSLT Series

WSLT Series High Power Resistors
/vishaysuper12/
Vishay WSLT High Power Resistors Features
  • Ideal for all types of current sensing , voltage division, and pulse applications including switching and linear power supplies , instruments, power amplifiers
  • Proprietary processing technique produces extremely low resistance values (down to 0.01 Ω)
  • Specially selected and stabilized materials allow for high temperature ratings (2 x standard WSL rating)
  • All welded construction
  • Solid metal Nickel-Chrome alloy resistive element with low TCR (< 20 ppm/°C)
  • Very low inductance (< 5 nH)
  • Excellent frequency response to 50 MHz
  • Low thermal EMF (< 3 μV/°C)
  • Compliant to RoHS directive 2002/95/EC
Standard Electrical Specifications
GLOBAL MODEL
POWER RATING
P 70ºC W
RESISTANCE RANGE Ω
WEIGHT (typical)
g/1000 pieces
± 0.5%
WSLT2010
1.0 0.01 to 0.50 38.9
WSLT2512 1.0 0.015 to 0.5
63.6
WSLT3921 3.0 0.5 to 4
281
WSLT5931 5.0 0.3 to 3
398
Technical Specifications


Performance

RCWE Series

RCWE Series Thick Film, Extremely Low Value
Vishay RCWE Thick Film Resistors
Features
  • Extremely low resistance values (0.01 Ω to 0.976 Ω)
  • Suitable for current sensing and shunts
  • Metal glaze on high quality ceramic
  • Protective overglaze
  • Lead (Pb)-free solder contacts on Ni barrier layer
  • Compliant to RoHS directive 2002/95/EC
  • Halogen-free according to IEC 61249-2-21 definition
Standard Electrical Specifications
GLOBAL MODEL
POWER RATING P 70ºC W
TEMPERATURE
COEFFICIENT ppm/ºC
RESISTANCE RANGE Ω
E-SERIES
± 1.0%
± 5.0%
RCWE0402
0.125
±400
- 0.033 to 0.05
24
±200 0.051 to 0.18
±100 0.2 to 0.976
RCWE0603
0.2
±700
-
0.010 to 0.018 24
±400 0.02 to 0.03
±200 0.033 to 0.1
±100 0.11 to 0.976
RCWE0805
0.25
±400
- 0.010 to 0.018 24
±300 0.02 to 0.03
±200 0.033 to 0.05
±100 0.051 to 0.976
RCWE1206
0.5
±600 -
0.010 to 0.018
24
±300 0.02 to 0.03
±200 0.033 to 0.05
±100 0.051 to 0.976
1.0
±500 -
0.010 to 0.018
24

±300 0.02 to 0.03
±200 0.033 to 0.05
±100 0.051 to 0.976
RCWE2010
1.0
±600 -
0.010 to 0.018
24
±300 0.02 to 0.03
±200 0.033 to 0.05
±100 0.051 to 0.976
RCWE2512

2.0
±600 - 0.010 to 0.018
±300 0.02 to 0.03
±200 0.033 to 0.05
±100 0.051 to 0.976
Notes: Power rating depends on the max. temperature at the solder point, the component placement density and the substrate material.
Part marking: Reference "Surface Mount Resistor Marking" (document number 20020).

Technical Specifications


Performance


RCWL Series

RCWL Series Thick Film, Low Value
Vishay RCWL Thick Film Resistors Features
  • Extremely low resistance values (0.1 Ω to 0.91 Ω)
  • Suitable for current sensing and shunts
  • Metal glaze on high quality ceramic
  • Protective overglaze
  • Solder contacts on Ni barrier layer
  • Compliant to RoHS directive 2002/95/EC
  • Halogen-free according to IEC 61249-2-21 definition
Standard Electrical Specifications
GLOBAL MODEL
POWER RATING P 70ºC W
TEMPERATURE
COEFFICIENT ppm/ºC
RESISTANCE RANGE Ω
E-SERIES
± 5.0%
RCWL0402 0.063
±600 0.22 to 0.43
24
±400 0.47 to 0.91
RCWL0603 0.1
±400 0.10 to 0.43
24
±200 0.47 to 0.91
RCWL0805 0.125
±300 0.10 to 0.43
24
±200 0.47 to 0.91
RCWL1206 0.25
±300 0.10 to 0.43
24
±200 0.47 to 0.91
RCWL1210 0.33 ±200 0.10 to 0.91
24
RCWL1218 1.0 ±200 0.10 to 0.91
24
RCWL2010 0.5 ±200 0.10 to 0.91
24
RCWL2512 1.0 ±200 0.10 to 0.91
24
Notes: Power rating depends on the max. temperature at the solder point, the component placement density and the substrate material
Part marking: Reference Surface Mount Resistor Marking document number 20020
The resistance is measured from the top side

Technical Specifications


Performance






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