There are a few potential reasons why your microwave could be tripping your circuit breaker:
Overloaded circuit: Microwaves use a lot of power, so if your microwave is connected to a circuit that already has a lot of other appliances or devices connected to it, it could be overloading the circuit and tripping the breaker.
Faulty microwave: It's possible that there is an issue with your microwave that is causing it to draw more power than it should, which could be overloading the circuit and tripping the breaker.
Faulty wiring: If the wiring in your house is old or damaged, it could be causing the circuit to overload when the microwave is turned on.
Faulty circuit breaker: In some cases, the circuit breaker itself could be faulty and need to be replaced.
To troubleshoot the issue, try plugging the microwave into a different outlet on a different circuit to see if the problem persists. If the microwave still trips the breaker, it may be a problem with the microwave itself. If it doesn't trip the breaker, the issue could be related to the circuit or the breaker. In that case, it's best to consult an electrician to diagnose and fix the issue.