Solid State Relay SSR-120DA Dc-ac 120A

Characteristic of solid state relays

Solid state relays (SSR for short) is a kind of electronic switch with isolating function and without mechanical contacts, made up

of semiconductor and passive element, make use of photoelectric coupler and transformer to electric isolate or electric couple the

control circuit (input terminal) and load circuit (output terminal), there isn’ t any movable parts inside. The solid state relay not only

has switching function that is the same as electromagnetic relay, but also has advantages such as compatible with logic circuit, firm

mounted switch, low electromagnet interference or radio frequency interference, long service life and high reliability.