The OFDPN 2P40A is a two-pole (2P) integrated earth leakage circuit breaker that combines overload protection, short-circuit protection, and high-sensitivity residual current (earth leakage) protection. This product is strictly designed and manufactured in accordance with national and international electrical standards, featuring a compact modular structure capable of simultaneously interrupting both the live (L) and neutral (N) lines. It is specifically designed to provide comprehensive electrical safety protection for final circuits in single-phase AC low-voltage power distribution systems, effectively preventing personal electric shock accidents and electrical fires caused by earth faults. It is an ideal protective device for single-phase power usage scenarios such as residential and commercial applications.