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SSR and a hotplate Answered

Dumb question. Have a heating plate that uses 1100 watts and runs on 120 volts ac. if 1100 watss / 120 volts = more or less 10amps, Could I safely use a 10 amp rated ssr aka solid state relay or use something higher.

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Antzy Carmasaic

4 years ago

What abqlewis said.. Definitely a higher value one is better. Current will not stay fixed and there might be fluctuations.

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abqlewis

4 years ago

I normally derate components like this. I built something similar (~10Amps), but I used a 25Amp SSR. Theoretically lengthening the life of the components in case of, for example, higher inrush current every time the hot plate turns on. It was easy for these SSRs since 25Amp version wasn't too much more than a 10Amp. Whatever you use, rating is almost worthless without heatsink. I mounted mine with heatsink compound.