Voltage suppressors are rectifier avalanche diodes that dissipate power pulse in the breakdown region of the reverse volt-ampere curve within a limited period of time. They are used for protection of semiconductor power devices and capacitors from switching surges, as well as to limit voltage in electrical equipment at frequencies up to 500 Hz.
These diodes can also be used as freewheeling diodes connected back-to-back/parallel to thyristors or as shunting diodes for inductance load.
These diodes are used in DC and AC circuits with frequency of up to 500 Hz, and in general purpose electrical and electronic devices.
Avalanche diodes can eliminate or considerably simplify overvoltage protection circuits in converters, especially in case of a large number of series connected diodes.