There are many features of our Solid State Relays(SSR). Small input power, typical value of DC Solid State Relay is 10mA, it can be combined with logical circuits; Output contact resistance is stable, there is no poor contact by mechanical or electrical wear; Good ability against disturbance; Less electromagnetic interference to outside and so on.
The advantages Solid State Relays(SSR) have compared to Electro Magnetic Relays(EMR) are well-known. Fully electronics, there is no moving parts inside SSR; Good compatibility with PLC output; Very long life expectancy under using frequently. Thanks to their unlimited life-time, SSR don't require any maintenance and prevent manufacturers from unforeseen machines or production stop.