The larger of the two is typically the circuit breaker. Circuit breakers are designed to protect electrical circuits from overcurrents, which can cause damage or fires. They are generally larger in size and have a higher current rating compared to leakage protectors. For instance, a standard residential circuit breaker might have a current rating of 15 or 20 amperes, whereas a typical leakage protector might have a current rating of 30 or 50 milliamperes. The larger size of the circuit breaker is due to its ability to handle higher currents and its more robust construction, which includes features like a trip mechanism and a handle for manual operation. This ensures that the circuit breaker can effectively interrupt the circuit in the event of an overcurrent, providing better protection for the electrical system.