Ceramic Power Resistor 5W 0.5Ω
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Prices updated: 12 Oct 2026
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About this product
A 5 W ceramic power resistor rated at 0.5 Ω, used where a low resistance must dissipate significant power. Typical uses include current sensing, load testing, discharge circuits and current limiting in power stages. Ceramic power resistors tolerate higher temperatures than standard carbon resistors and should be mounted with clearance from heat-sensitive parts.
Specifications
- Resistance
- 0.5 Ω
- Power rating
- 5 W
- Type
- Ceramic power resistor
Frequently asked questions
How do I check that the resistor can handle my current?
Power dissipated equals I² × R. For example, 3 A through 0.5 Ω dissipates 4.5 W, which is close to the 5 W rating, so a higher-rated part or heatsinking would be needed for margin.
Can it be used for current sensing?
Yes. By Ohm's law, the voltage across it is V = I × R, so 1 A gives 0.5 V. The measured voltage is typically amplified by a differential amplifier before reading it with a microcontroller.
