... , On-off time:100ms. SSR(1 or 3 phase Solid State Relay)1, Features: Imported electrical parts,high switching speed, ... /3-phase Solid State Relay,DC/AC Solid State Relay,medium/high-power solid state relay.Working current 25-300A.3. Pancake, Column in various sizes ... control, numerical control machinery etc.against moisture,humidity,explosion. The input terminals are compatible with IC ,such as TTL,HTL ...