KS28 is a dual AC solid state relays, that two completely independent AC output solid-state relays are integrated in a standard panel package. The product control voltage offer (4~15)VDC and (15~32)VDC two type, load voltage 240VAC and 380VAC, load current divided to 25A, 40A and 50A. Using optical isolation between input and output, and with built-in RC snubber circuit. The product can be used for heating, lighting control and other occasions.