KS53 is a panel-mounted AC Solid State Relay, offer (3~32)VDC input voltage control, with outputs current at 10A,15A and 20A,load voltage range from 48VAC to 440VAC. With compact structure and small size. The relays provide 4000VAC opto-isolation, between input and output.With built-in RC snubber circuit. Encapsulation,thermally conductive epoxy.