An SCR is a latching devise, once triggered, it remains latched on until the current flow between the anode & cathode stops. A Triac is an SCR for AC circuits, constructed of two SCRs back toback, even though they are AC devices , triacs are polarity conscious. - DIAC - 32V Typ/200µA - Bi-direct. trigger - Equiv. No.: BT2, BR100 - (D)
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