Look up circuit breaker in Wiktionary, the free dictionary.

A circuit breaker is an automatic electrical switch.

Circuit breaker or circuit breakers may also refer to:

• Trading curb or circuit breaker, a stock market term
• Richie Hawtin (born 1970) alias Circuit Breaker, an electronic musician and DJ
• "Circuit Breaker", a song from Röyksopp's album The Understanding
• Circuit breaker design pattern, a design pattern in programming
• Circuit Breakers (video game), a 1998 racing video game
• Circuit Breaker, a superhero from the Transformers comics
• Circuit Breaker, a gadget blog on The Verge, an American technology news and media network
• Circuit Breaker, the name Singapore gave its partial lockdown during the COVID-19 pandemic, and subsequently adopted by other countries.