Published:2009/7/13 20:42:00 Author:May | From:SeekIC
RCA 40527 triac is triggered by small neon. After breakdown occurs bidirectionally at 88 V, triac takes over as short-circuit. D1 can be any other voltage breakdown device, such as diac or zener, and thyristor can be used in place of triac to give unilateral switching. Applications include use as power crowbar, with breakdown level set by artificial resistance-controlled zener.-L. A. Rosenthal, Breakdown and Power Devices Form Unusual Power Switch, EDN Magazine, July 5, 1974,p74-75.
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