SSR recommendation

General discussions and questions abound development of code with MicroPython that is not hardware specific.
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mathieu
Posts: 88
Joined: Fri Nov 10, 2017 9:57 pm

SSR recommendation

Post by mathieu » Thu Jul 14, 2022 12:31 am

I'm finding it surprisingly difficult to find an optimal SSR to safely switch a low-power 230 VAC appliance (air extractor) using a 3.3V GPIO. Ideally, this would be normally connected (so that when I power down my pyboard the switch is on). The best I could find is this: https://whadda.com/product/1-channel-so ... le-wpm332/, but I'm not completely sure if the signal and the load are fully isolated.

Does anyone have suggestions?
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davef
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Joined: Thu Apr 30, 2020 1:03 am
Location: Christchurch, NZ

Re: SSR recommendation

Post by davef » Thu Jul 14, 2022 12:49 am

I used some FSS1-102Z but they have a 4-5V switching level. Maybe there are some similar 3V3 parts in that product line.
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mathieu
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Re: SSR recommendation

Post by mathieu » Thu Jul 14, 2022 8:51 am

Thanks, I'll look into it. For now I'm leaning toward something like a Celduc SUL842070 SSR, which should be pretty safe.
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