2512 SMD Alloy Power Shunt Resistor 1W 0.1 Ohm R100
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Prices updated: 13 Oct 2026
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About this product
A 2512 SMD alloy power shunt resistor rated at 1 W with a 0.1 Ohm value, marked R100. A shunt creates a small, measurable voltage drop proportional to the current flowing through it, so it is used for current sensing in battery monitors, motor drives and power supplies.
Specifications
- Resistance
- 0.1 Ohm
- Power rating
- 1 W
- Package
- 2512 (6.4 x 3.2 mm)
- Marking
- R100
- Type
- Alloy power shunt
Frequently asked questions
How is a shunt resistor wired for current measurement?
Place it in series with the load so all the current flows through it. Measure the small voltage across its terminals with a differential amplifier or an ADC, then calculate I = V / R. Keep the sense traces separate from the high-current path.
What current can this 0.1 Ohm shunt handle at 1 W?
At 0.1 Ohm, 1 W corresponds to about 3.16 A (square root of 1 W divided by 0.1 Ohm). Keep the real dissipation well below the rating, since the usable power depends on board heating and ambient temperature.
