I'd like to find out which to use: a SSR (Solid State Relay) using TRIAC and optocoupler or a relay.
My consideration are from the point of power consumed, my challenge here is to choose the less power consumer one.
The biggest problem I found with a relay is through holding its state; the power is consumed first to activate the relay, then to hold the relay activated. If that lasts for long time, it will consume so much power.
My application is using a microcontroller that controls the flow of AC electricity that requires latching the state, what ever it is, for a long time.
So, from the point of power consumption, is the SSR (using a TRIAC and a MOC) or the relay more power hungry?