Advantages over mechanical relays
* SSRs are faster than electromechanical relays; their switching time is dependent on the time needed to power the LED on and off, on the order of microseconds to milliseconds
* Increased lifetime due to the fact that there are no moving parts, and thus no wear
* Clean, bounceless operation
* Decreased electrical noise when switching
* Can be used in explosive environments where a spark must not be generated during turn-on
* Totally silent operation
* Smaller than a corresponding mechanical relay.
* Can continue to operate while subjected to severe vibration.