The answer to 'how long does circuit breaker last' is that a properly maintained circuit breaker can last 30-40 years or more. Circuit breakers are designed to be durable and reliable, but their lifespan depends on factors like the quality of the breaker, how often it is used, and environmental conditions. Proper installation and regular inspection and maintenance by a licensed electrician are key to maximizing the lifespan of a circuit breaker.
Over time, the internal components of a circuit breaker can wear down or become damaged, reducing its ability to function properly. Signs that a circuit breaker may need to be replaced include frequent tripping, difficulty resetting, or visible damage or corrosion. It's important to address any issues with a circuit breaker promptly to ensure the safety and reliability of your home's electrical system.