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Related to circuit breaker: fuse, relay, Switchgear, Earth leakage circuit breaker, Air Circuit Breaker
1. An automatic switch that stops the flow of electric current in a suddenly overloaded or otherwise abnormally stressed electric circuit.
2. An automatic halt or suspension in the trading on a stock exchange that takes effect in response to a specified amount of loss.
(Electronics) a device that under abnormal conditions, such as a short circuit, interrupts the flow of current in an electrical circuit. Sometimes shortened to: breaker Compare fuse26
a device for automatically interrupting an electric circuit to prevent excessive current, as that caused by a short circuit, from damaging the apparatus in the circuit or from causing a fire.
A switch that automatically interrupts the flow of an electric current if the current becomes too strong.