These high-current, high-voltage solid state relays are designed for ON-OFF or phase controlling of high-power AC applications. High current and high dV/dt capabilities will allow switching of inductive loads e.g. transformers, motors, valves and solenoids as well as all resistive loads. A zero crossing drive circuit will minimize the negative effects of different load types. Optocouplers provide an ideal interface to logic level DCoutputs.