circuit breaker


Definition of 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 One of the island’s four main power plants had suffered the failure of a circuit breaker, erupting in flames. Xander Peters, The Christian Science Monitor, 9 May 2022 The company has said a circuit breaker failure could have caused the blackout after a fire erupted late Wednesday at the Costa Sur power plant in southern Puerto Rico. Fox News, 10 Apr. 2022 Officials are now focused on investigating what caused the failure of a circuit breaker. Laura Blasey, Los Angeles Times, 12 Apr. 2022 SafeCore acts as a circuit breaker to prevent lithium-ion batteries from igniting from internal shorts, overcharging or overheating — which is known as thermal runaway. Mike Freeman, San Diego Union-Tribune, 23 Feb. 2022 There's been hope that tech earnings could serve as a circuit breaker. Julia Horowitz, CNN, 26 Jan. 2022 The circuit breaker had been disconnected and various jewelry and electronics were stolen, police said. Pioneer Press Staff,, 4 Jan. 2022 Meanwhile the management of the Texas power grid is harshly criticized by members of Congress who could not personally reset a home circuit breaker without the help of at least four consultants and a pollster. Dave Barry, Washington Post, 26 Dec. 2021 In a sign that the relief was limited, Turkey’s stock market resumed its multiday slide after news of the government plan, triggering two circuit breaker halts in trading. Jared Malsin, WSJ, 21 Dec. 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'circuit breaker.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of circuit breaker

1872, in the meaning defined above

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Time Traveler for circuit breaker

Time Traveler

The first known use of circuit breaker was in 1872

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Dictionary Entries Near circuit breaker

circuit board

circuit breaker

circuit court

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Statistics for circuit breaker

Last Updated

17 May 2022

Cite this Entry

“Circuit breaker.” Dictionary, Merriam-Webster, Accessed 20 May. 2022.

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More Definitions for circuit breaker

circuit breaker


Kids Definition of circuit breaker

: a switch that automatically stops the flow of electric current if a circuit becomes overloaded

More from Merriam-Webster on circuit breaker Encyclopedia article about circuit breaker


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