DIAC (diode for alternating current)

For general-purpose applications

* Glass-passivated three-layer for triggering thyristors

* Low breakover current at breakover voltage

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The DIAC (diode for alternating current) is a diode that conducts electrical current only after its breakover voltage, VBO, has been reached momentarily. … DIACs have no gate electrode, unlike some other thyristors that they are commonly used to trigger, such as TRIACs.