Current Sense SMD Resistors

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We offer current sense SMD resistors from 25µΩ to 3kΩ, with power ratings from 50mW to 50W. We also have 0Ω devices to be used as jumpers.

What are Current Sense SMD Resistors?

Current Sense Resistors are similar to normal resistors but with very low resistance ratings and high power ratings. These shunt resistors of known resistor value (R) are placed in a current conducting path so that the entire current (I) which is to be measured flows through them. By measuring the voltage drop (V) across the resistor and then using simple Ohm’s Law (I=V/R), we can calculate the amount of current that flows through the circuit.

Why use a current sense resistor?

Sensing the current flow is an important requirement in many power and general electronics applications. Often, current sensing is essential to monitor and control an application; for example, a battery charger circuit requires current sensing capability to correctly charge the battery and to determine the charge current needed from the driver.

How do I choose a current sense resistor?

The first step in selecting a current sense resistor is based on understanding the application, particularly in terms of its maximum input voltage. Also, as it will be passing a heavy current (because it is connected in series with the load) its I2R losses will likely be significant even if its resistance value is small. Therefore, a knowledge of its power rating is essential.

The next step is to know the tolerance and package required for the shunt resistor. Less than 1% tolerance is a good choice. But if the application demands extra accuracy, 0.5% to 0.1% tolerance shunt resistors may be more appropriate.

After choosing the value, power rating, and tolerance, it is important to select a suitable package that is easy to solder as well as with a lower footprint for smaller PCB areas. Try to select a resistor with a very low TCR value, ideally below 100 ppm/°C.

 
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WSL2512R2500FEA
WSL2512R2500FEA - SMD Current Sense Resistor, WSL Series, 0.25 ohm, WSL Series, 2512 [6432 Metric], 1 W, ± 1%

26R4263

SMD Current Sense Resistor, WSL Series, 0.25 ohm, WSL Series, 2512 [6432 Metric], 1 W, ± 1%

VISHAY

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0.25ohm WSL Series 2512 [6432 Metric] 1W ± 1% Metal Strip - - ± 75ppm/°C - 6.35mm 3.18mm 0.635mm -65°C 170°C AEC-Q200 -
RL1220S-R10-F
RL1220S-R10-F - SMD Current Sense Resistor, 0.1 ohm, RL Series, 0805 [2012 Metric], 250 mW, ± 1%, Thin Film

28K1608

SMD Current Sense Resistor, 0.1 ohm, RL Series, 0805 [2012 Metric], 250 mW, ± 1%, Thin Film

SUSUMU

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0.1ohm RL Series 0805 [2012 Metric] 250mW ± 1% Thin Film - - 0ppm/°C to +200ppm/°C - 2.01mm 1.25mm 0.4mm -55°C 125°C - -
ERJ14BSFR10U
ERJ14BSFR10U - SMD Current Sense Resistors, AEC-Q200 ERJ Series, 0.1 ohm, 500 mW, - 1% RoHS Compliant: Yes

63W0518

SMD Current Sense Resistors, AEC-Q200 ERJ Series, 0.1 ohm, 500 mW, - 1% RoHS Compliant: Yes

PANASONIC

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LRCS0402-1RFT5
LRCS0402-1RFT5 - SMD Current Sense Resistors, LRCS Series, 1 ohm, 63 mW, - 1%, 0402 [1005 Metric] RoHS Compliant: Yes

61M7599

SMD Current Sense Resistors, LRCS Series, 1 ohm, 63 mW, - 1%, 0402 [1005 Metric] RoHS Compliant: Yes

TT ELECTRONICS / WELWYN

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RL1632S-R050-F
RL1632S-R050-F - SMD Current Sense Resistor, 0.05 ohm, RL Series, 1206 [3216 Metric], 500 mW, ± 1%, Thin Film

28K1692

SMD Current Sense Resistor, 0.05 ohm, RL Series, 1206 [3216 Metric], 500 mW, ± 1%, Thin Film

SUSUMU

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0.05ohm RL Series 1206 [3216 Metric] 500mW ± 1% Thin Film - - 0 to +200ppm/°C - 3.2mm 1.6mm 0.5mm -55°C 125°C - -
RL3720WT-R010-F
RL3720WT-R010-F - SMD Current Sense Resistor, 0.01 ohm, RL Series, 1508 [3820 Metric], 1 W, ± 1%, Thin Film

28K1735

SMD Current Sense Resistor, 0.01 ohm, RL Series, 1508 [3820 Metric], 1 W, ± 1%, Thin Film

SUSUMU

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0.01ohm RL Series 1508 [3820 Metric] 1W ± 1% Thin Film - - 0, +350ppm/°C - 2mm 3.75mm 0.5mm -55°C 125°C - -
CRA2512-FZ-R010ELF
CRA2512-FZ-R010ELF - SMD Current Sense Resistor, CRA2512 Series, 0.01 ohm, CR Series, 2512 [6432 Metric], 3 W, ± 1%

14P5516

SMD Current Sense Resistor, CRA2512 Series, 0.01 ohm, CR Series, 2512 [6432 Metric], 3 W, ± 1%

BOURNS

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0.01ohm CR Series 2512 [6432 Metric] 3W ± 1% Metal Film - - ± 75ppm/°C - 6.4mm 3.2mm 0.7mm -55°C 170°C AEC-Q200 -
RL1220S-R20-F
RL1220S-R20-F - SMD Current Sense Resistor, 0.2 ohm, RL Series, 0805 [2012 Metric], 250 mW, ± 1%, Thin Film

28K1616

SMD Current Sense Resistor, 0.2 ohm, RL Series, 0805 [2012 Metric], 250 mW, ± 1%, Thin Film

SUSUMU

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0.2ohm RL Series 0805 [2012 Metric] 250mW ± 1% Thin Film - - 0ppm/°C to +200ppm/°C - 2.01mm 1.25mm 0.4mm -55°C 125°C - -
LRC-LR1206LF-01-R250-F
LRC-LR1206LF-01-R250-F - SMD Current Sense Resistor, LRC Series, 0.25 ohm, LRC Series, 1206 [3216 Metric], 500 mW, ± 1%

70K8688

SMD Current Sense Resistor, LRC Series, 0.25 ohm, LRC Series, 1206 [3216 Metric], 500 mW, ± 1%

TT ELECTRONICS / INTERNATIONAL RESISTIVE

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0.25 LRC Series 1206 [3216 Metric] 500 ± 1% Thick Film - - ± 100ppm/°C - 3.2 1.6 0.8mm -55 150 AEC-Q200 -
WSK2512R0250FEA
WSK2512R0250FEA - SMD Current Sense Resistor, WSK Series, Power Metal Strip-«, 0.025 ohm, WSK Series

98K2976

SMD Current Sense Resistor, WSK Series, Power Metal Strip-«, 0.025 ohm, WSK Series

VISHAY

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0.025ohm WSK Series 2512 [6432 Metric] 1W ± 1% Metal Film - - ± 35ppm/°C - 6.35mm 3.18mm 0.635mm -65°C 170°C AEC-Q200 -
ERJ8BWFR100V
ERJ8BWFR100V - SMD Current Sense Resistor, 0.1 ohm, ERJ8B Series, 1206 [3216 Metric], 1 W, ± 1%, Thick Film

08N2429

SMD Current Sense Resistor, 0.1 ohm, ERJ8B Series, 1206 [3216 Metric], 1 W, ± 1%, Thick Film

PANASONIC

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0.1ohm ERJ8B Series 1206 [3216 Metric] 1W ± 1% Thick Film - - ± 100ppm/°C - 3.2mm 1.6mm 0.65mm -55°C 155°C AEC-Q200 -
WSLP1206R0100FEA
WSLP1206R0100FEA - SMD Current Sense Resistor, WSLP Series, 0.01 ohm, WSL Series, 1206 [3216 Metric], 1 W, ± 1%

84R1939

SMD Current Sense Resistor, WSLP Series, 0.01 ohm, WSL Series, 1206 [3216 Metric], 1 W, ± 1%

VISHAY

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0.01ohm WSL Series 1206 [3216 Metric] 1W ± 1% Metal Strip - - ± 75ppm/°C - 3.2mm 1.6mm 0.635mm -65°C 170°C AEC-Q200 -
LRC-LR2010LF-01-R250-F
LRC-LR2010LF-01-R250-F - SMD Current Sense Resistor, 0.25 ohm, LRC Series, 2010 [5025 Metric], 1 W, ± 1%, Thick Film

88K2573

SMD Current Sense Resistor, 0.25 ohm, LRC Series, 2010 [5025 Metric], 1 W, ± 1%, Thick Film

TT ELECTRONICS / INTERNATIONAL RESISTIVE

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0.25 LRC Series 2010 [5025 Metric] 1 ± 1% Thick Film - - ± 100ppm/°C - 5.23 2.64 0.84 -55 150 AEC-Q200 -
WSL2512R1000FEA
WSL2512R1000FEA - SMD Current Sense Resistors, AEC-Q200 WSL Series, 0.1 ohm, 1 W, - 1%, 310 mV RoHS Compliant: Yes

98K3046

SMD Current Sense Resistors, AEC-Q200 WSL Series, 0.1 ohm, 1 W, - 1%, 310 mV RoHS Compliant: Yes

VISHAY

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0.1ohm WSL 2512 [6432 Metric] 1W ± 1% Metal Strip - - ± 75ppm/°C - 6.35mm 3.18mm 0.635mm -65°C 170°C AEC-Q200 -
CRA2512-FZ-R020ELF
CRA2512-FZ-R020ELF - SMD Current Sense Resistor, CRA2512 Series, 0.02 ohm, CR Series, 2512 [6432 Metric], 3 W, ± 1%

14P5518

SMD Current Sense Resistor, CRA2512 Series, 0.02 ohm, CR Series, 2512 [6432 Metric], 3 W, ± 1%

BOURNS

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0.02ohm CR Series 2512 [6432 Metric] 3W ± 1% Metal Film - - ± 75ppm/°C - 6.4mm 3.2mm 0.7mm -55°C 170°C AEC-Q200 -
WSL2512R2500FEA
WSL2512R2500FEA - SMD Current Sense Resistors, AEC-Q200 WSL Series, 0.25 ohm, 1 W, - 1%, 500 mV RoHS Compliant: Yes

98K3049

SMD Current Sense Resistors, AEC-Q200 WSL Series, 0.25 ohm, 1 W, - 1%, 500 mV RoHS Compliant: Yes

VISHAY

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0.25ohm WSL 2512 [6432 Metric] 1W ± 1% Metal Strip - - ± 75ppm/°C - 6.35mm 3.18mm 0.635mm -65°C 170°C AEC-Q200 -
WSL12061L000FEA
WSL12061L000FEA - SMD Current Sense Resistor, 0.001 ohm, WSL Series, 1206 [3216 Metric], 250 mW, ± 1%, Metal Strip

18X4707

SMD Current Sense Resistor, 0.001 ohm, WSL Series, 1206 [3216 Metric], 250 mW, ± 1%, Metal Strip

VISHAY

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0.001ohm WSL Series 1206 [3216 Metric] 250mW ± 1% Metal Strip - - ± 275ppm/°C - 3.2mm 1.6mm 0.635mm -65°C 170°C AEC-Q200 -
RL73H2AR22FTD
RL73H2AR22FTD - CURRENT SENSE RES, 0R22, 1%, 125 MW

43AC4015

CURRENT SENSE RES, 0R22, 1%, 125 MW

CGS - TE CONNECTIVITY

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0 - - 0 - - - - - - 0 0 0 -55°C 0 - -
CSS2H-3920R-L200FE
CSS2H-3920R-L200FE - CURRENT SENSE RES, 200 µOHM, 1%, 12 W

67AC7862

CURRENT SENSE RES, 200 µOHM, 1%, 12 W

BOURNS

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200µohm CSS2H-3920 3921 [1052 Metric] 12W ± 1% Metal Strip - - ± 50ppm/°C - 10mm 5.2mm 2.5mm -55°C 170°C AEC-Q200 -
LVM25FVR050E-TR
LVM25FVR050E-TR - SMD Current Sense Resistor, 0.05 ohm, LVM Series, 2512 [6432 Metric], 1 W, ± 1%, Metal Foil

51AC1070

SMD Current Sense Resistor, 0.05 ohm, LVM Series, 2512 [6432 Metric], 1 W, ± 1%, Metal Foil

OHMITE

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0.05ohm LVM Series 2512 [6432 Metric] 1W ± 1% Metal Foil - - ± 50ppm/°C - 6.4mm 3.2mm 0.7mm -55°C 170°C - -
WSL2512R0100FEB
WSL2512R0100FEB - RES, 0R01, 1W, 2512, METAL STRIP ROHS COMPLIANT: YES

14AJ2833

RES, 0R01, 1W, 2512, METAL STRIP ROHS COMPLIANT: YES

VISHAY

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0.01ohm WSL 2512 [6432 Metric] 1W ± 1% Metal Strip - - ± 75ppm/°C - 6.35mm 3.18mm 0.635mm -65°C 170°C AEC-Q200 -
WSL2010R4000FEA18
WSL2010R4000FEA18 - RES, 0R4, 1W, 2010, METAL STRIP ROHS COMPLIANT: YES

14AJ2827

RES, 0R4, 1W, 2010, METAL STRIP ROHS COMPLIANT: YES

VISHAY

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0.4ohm WSL-HP 2010 [5025 Metric] 1W ± 1% Metal Strip - - ± 75ppm/°C - 5.08mm 2.54mm 0.635mm -65°C 170°C AEC-Q200 -
CFG0612-FX-R010ELF
CFG0612-FX-R010ELF - RES, 0R01, 1W, 1206W, METAL FOIL

29AH2286

RES, 0R01, 1W, 1206W, METAL FOIL

BOURNS

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0.01ohm CFG 1206 Wide 1W ± 1% Metal Foil - - ± 100ppm/°C - 1.6mm 3.2mm 0.7mm -55°C 155°C - -
PE2512FKE7W0R04L
PE2512FKE7W0R04L - RES, AEC-Q200, 0R04, 1%, 2W, 2512 ROHS COMPLIANT: YES

82AH7703

RES, AEC-Q200, 0R04, 1%, 2W, 2512 ROHS COMPLIANT: YES

YAGEO

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0 PE_L Series 2512 [6432 Metric] 0 ± 1% Metal Film - - ± 50ppm/°C - 0 0 0 -55°C 0 AEC-Q200 -
LTR18EZPFL1R00
LTR18EZPFL1R00 - RES, 1R, 1%, 0612, 1.5W ROHS COMPLIANT: YES

39AH0796

RES, 1R, 1%, 0612, 1.5W ROHS COMPLIANT: YES

ROHM

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0 LTR 0 0 ± 1% Thick Film - - ± 100ppm/°C - 0 0 0 -55°C 0 AEC-Q200 -