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What's the fundamental difference between an AC and DC SSR?
The wikipedia page is decent for this
And if you try and use DC in an AC SSR, why does it latch on and then not switch off?
I'd imagine it's latching due to zero crossing logic - your dc voltage isn't going to cross zero even if you go from +V to 0V, and some AC relays will only switch at the zero cross point.
yoshy-
The wikipedia page is decent for this
Didn't even think to look for a Wikipedia page! Good shout.
I'd imagine it's latching due to zero crossing logic - your dc voltage isn't going to cross zero even if you go from +V to 0V, and some AC relays will only switch at the zero cross point.
Yes, makes total sense now. No zero cross with DC so no switching happens, but now makes sense why if I manually turn the voltage down to zero it switches off and stays off.
Jonny69
Anyone know anything about solid state relays? What's the fundamental difference between an AC and DC SSR? I think I know a DC SSR is a straight MOSFET switch inside. What's different about an AC SSR? And if you try and use DC in an AC SSR, why does it latch on and then not switch off?