How to protect the solid state relay from overcurrent, overvoltage and overheating

Overcurrent and short circuits may cause permanent damage to the internal SCR of the solid state relay during use. In this case, it can be considered to install a fast fuse and an air switch in the control circuit for protection. Therefore, solid state relays with output protection, built-in RC snubber circuit and MOV should be selected, which can absorb surge voltage and improve dv/dt tolerance. It is also feasible to connect an RC snubber circuit and MOV in parallel at the output of the relay for output protection.