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SSR vs mosfet with drivers, why is SSR so slow?
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JohanHoltby:
I understand that there is challenge in making something work for every thing and that there will be paid a price in cost. The back to back mosfets is a way that I believe in most. I will have some more freedom but will increase PCB area since I will have more ICs. The zero crossing is something to be aware of so I totally agree and I will keep a sharp eye for it if I go with SSRs instead of using mosefets and gate drivers. The gate drivers however might have the same "feature" to watch out for.
langwadt:

--- Quote from: Richard Crowley on August 31, 2019, 01:47:38 pm ---Remember that most SSRs have built-in zero-crossing circuits which turn on only during the period when the mains waveform passes through zero volts.  That would completely circumvent an kind of phase-angle triggering.  You must be careful to get a SSR that allows phase triggering.  I just assume that all SSRs are zero-crossing unless proved otherwise.

--- End quote ---

there's  "SSRs" and there's SSRs, the "SSRs" are triacs and is only a relay in that they can replace a relay in some specific AC applications
JohanHoltby:
Hahah :) Every thing got a name thees days. What I intended what the plural form of SSR. ;) Will keep that in mid though!
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