I had a problem for a while with optocoupler and triac interfaces. I was told that eventhough connecting the collector and emitter of the optocoupler to a 120V AC source, the voltage will never ever be 120V because of the breakdown voltage of the diac.
What is the breakdown voltage exactly and what happens if the voltage supplied actually exceeds this value?
What is the breakdown voltage exactly and what happens if the voltage supplied actually exceeds this value?