Page In addition to an extensive selection of catalog off-the-shelf items, Crydom offers custom-designed solid state relays. Fact is we specialize in satisfying the most demanding environmental and performance requirements our customers can devise. Give us your specs, and watch us exceed your expectations! European directives.

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Designed for endurance and reliability in harsh industrial applications, the HD utilizes rugged back-to-back inverse parallel SCRs to switch power to AC loads. The input of the HD can accept control signals between 4Vdc and 32Vdc and incorporates an active current-limiting circuit. This enables the HD to switch 90 amp loads with only 12mA of input current, making them ideal for applications utilizing low-power PLCs or control boards. When an input signal is applied, the output of the solid state relay will not conduct load current until the AC mains passes through the zero-crossing point of the sine wave.


HD4890 Crydom Co., HD4890 Datasheet


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