HGC series three phase solid state relays, adapting ignition-proof engineering plastic cover, filled with EPOXY, screw thread connection, have the features of hard structure,vibration-proof capability high, input driving current small convenient to interface with terminals of computer and various digital tele-control circuit. This series are widely used in the fields of petrochemical equipment, foodstuff-producing machines, packaging machines, textile and plastic mechanisms, tool numerical control, gymnasium equip. Specialities be the same with canker, aquosity request prevent explode scurvines circumstance, and often switch of occasion.