The Eaton NSB QBH1030EP miniature circuit breaker is a 1-pole, 30-amp, 120-volt AC protective device for single‑phase circuits. Part of Eaton’s QB family, it supports 50/60 Hz operation and is designed for use in electrical distribution setups that accept QB-series MCBs. It provides overcurrent protection for branch circuits by interrupting current during overloads or faults, helping to keep residential or light commercial electrical systems safe and reliable.
