The answer to 'which is better circuit breaker or fuse' is that circuit breakers are generally better than fuses for most residential and commercial electrical systems. Circuit breakers are more convenient, can be reset easily, and provide more flexible overcurrent protection compared to disposable fuses.
Circuit breakers are designed to automatically shut off the flow of electricity when a problem is detected, such as an overload or short circuit. This helps prevent damage to your electrical system and appliances. Fuses work similarly, but once a fuse blows, it needs to be physically replaced, which can be inconvenient. Circuit breakers can be reset with the flip of a switch, making them more user-friendly.