circuit breaker


: a switch that automatically interrupts the current of an overloaded electric circuit

Examples of circuit breaker in a Sentence

Recent Examples on the Web Sheriff’s spokesman Henry Wofford said the victim had gone out to check a circuit breaker after the power went out in his residence. Jeremy Childs, Los Angeles Times, 19 Sep. 2023 The digital circuit breaker is also about 3,000 times as fast as most mechanical breakers, enabling circuit interruption capabilities up to 150,000 amperes, the upper limit for today’s circuit breakers. IEEE Spectrum, 20 June 2023 The bank, founded by American billionaire Vernon Hill thirteen years ago, suffered a drop of 29% at one point, triggering automatic circuit breakers employed whenever a share price sharply rises or falls above a certain threshold. Chloe Taylor, Fortune, 5 Oct. 2023 Large air conditioners with 12 to 15 amps can trip the circuit breaker. Rachel Rothman, Good Housekeeping, 8 June 2023 Please have someone check your circuit breakers or fuse box. Chandra Fleming, Detroit Free Press, 2 Mar. 2023 The faults, which Marshall likened to a series of circuit breakers tripping at the same time, were remarkable for the amount of power lost, a third of the usual 120 volts coursing through lines. Jennifer McDermott, Fortune, 15 Aug. 2023 This suggests that a circuit breaker designed to protect the Rivian's high-voltage battery pack tripped. John Voelcker, Car and Driver, 5 Mar. 2023 Dave Spero, president of Professional Aviation Safety Specialists, the FAA technicians’ union, said a routine inspection found some equipment overheating on a circuit breaker. Ian Duncan, Washington Post, 26 June 2023 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'circuit breaker.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1872, in the meaning defined above

Time Traveler
The first known use of circuit breaker was in 1872

Dictionary Entries Near circuit breaker

Cite this Entry

“Circuit breaker.” Dictionary, Merriam-Webster, Accessed 29 Nov. 2023.

Kids Definition

circuit breaker

: a switch that automatically stops the flow of electric current in an overloaded circuit

More from Merriam-Webster on circuit breaker

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