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DIAC & TRIAC

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Triac & Diac

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Silicon controlled rectifier (scr/thyristor)

Diac & triacdiacA diac is a two-terminal semiconductor device that can conduct current in either direction when activated

diacDiac functions basically like two parallel 4 layer diodes turned in opposite directions

SCR working ( Case 1: Gate open )

Diac characteristic curve

TriacA triac is like a diac with a gate terminal

triacTriac basically functions like two parallel SCRs turned in opposite directions with a common gate terminal

Triac characteristic curve

referenceElectronic Devices & Circuits by David A Bell


Triac Diac calculator

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