The SIDAC is a silicon bilateral voltage triggered switch. Upon application of a voltage exceeding the SIDAC breakover voltage point, the SIDAC switches on through a negative resistance region to a low on-state voltage. Conduction continues until the current is interrupted or drops below the minimum holding current of the device.
SIDACs feature glass-passivated junctions to ensure a rugged and dependable device capable of withstanding
High voltage power supplies
Natural gas igniters
High-pressure Sodium lamps
Xenon flash ignition.