What Is a DIAC?


Quick Answer

A DIAC is a solid-state switch that conducts electricity above a certain breakover voltage limit and is used to switch AC voltage. When a DIAC's breakover voltage is achieved, the voltage across the diode drops and causes an increase in electric current running through the diode.

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Full Answer

The DIAC remains charged with electric current until it drops below a certain level called the holding current. When its charge level falls below the specified holding current, the diode transitions back into a non-conducting state. An average DIAC is set with a breakover voltage of approximately 30 volts and is constructed using a three-layer structure design.

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