The NB1L Residual Current Operated Circuit Breaker with Over-current Protection (RCBO) is a compact and versatile safety device that combines the functions of a Miniature Circuit Breaker (MCB) and a Residual Current Device (RCD). It provides reliable protection against overload, short-circuit, and earth leakage faults. With uninterrupted neutral poles and multiple sensitivity options, the NB1L is ideal for enhancing electrical safety and compliance in residential and small commercial applications.