In my current design, I have several
12V coil relays that control 120VAC coil relays with a 3 phase 480VAC load. I would like to switch my 12V coil relays out for triacs to reduce cost and save on board space. Can I replace my 12V coil relay with traic like
this? I drive the relays with a
ULN2003AD. Is there anything special I have to do to switch them out or can I just swap out the relay for the triac? Is there any advantage to keeping the relays over the triacs?
Also, several relays use both the NC and NO sides of the relay. Are there any triacs that can accommodate both NC and NO like a relay does?
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