Published:2009/7/13 4:58:00 Author:May | From:SeekIC
Simple AC relay operates during positive alternations of AC source, with optoisolator providing complete isolation between control circuit and SCR handling inductive load. When input LED is energized by control pulse, photo-SCR of optoisolator conducts and provides gate current for turning on power SCR. 1N4005 diode protects SCR from back EMF transients of inductive load.-T, Mazur, Solid-State Relays Offer New Solutions to Many Old Problems, EDN Magazine, Nov. 20, 1973, p 26-32.
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