What is Crowbar Circuit?

Definition

An overvoltage protection circuit that short-circuits the power supply output through a thyristor to blow a fuse and protect downstream equipment. Crowbar circuits provide last-resort protection for sensitive industrial electronics.

Related Terms

Thyristor

A semiconductor switching device used in soft starters, DC drives, and power con...

Overvoltage

A condition where voltage exceeds the rated maximum, often caused by regenerativ...

Surge Protection

Devices and circuits that protect equipment from transient voltage spikes caused...

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