2512 SMD Alloy Power Shunt Resistor 1W 0.020 Ohm R020
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Prices updated: 14 Oct 2026
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About this product
A 2512 SMD alloy power shunt resistor rated at 1 W with a 0.020 Ohm value, marked R020. It is used for current sensing where a very small voltage drop is acceptable, such as battery monitoring, motor current feedback and power supply current limiting.
Specifications
- Resistance
- 0.020 Ohm
- Power rating
- 1 W
- Package
- 2512 (6.4 x 3.2 mm)
- Marking
- R020
- Type
- Alloy power shunt
Frequently asked questions
What current can this 0.020 Ohm shunt handle at 1 W?
At 0.020 Ohm, 1 W corresponds to about 7.07 A (square root of 1 W divided by 0.020 Ohm). Keep the operating current below this figure with margin for heating.
How do I read the current from its voltage drop?
Measure the voltage across the shunt and divide by 0.020 Ohm. For example, 5 A through this shunt gives a 0.1 V drop, which can be amplified and read by an ADC.
