The E series solid-state relay is a DC input controlled, AC zero-crossing conduction, zero-crossing output type of non-contact relay, so it has a small di/dt ratio, stable starting performance, small interference to the power grid, and can reduce the back electromotive force of inductive loads when turned off. It has certain protection for electric appliances and solid-state relays, and is the preferred device for controlling general electrical appliances such as motors, heaters, and incandescent bulbs.