The ABB BMFW440/AC30 is a high-performance 40A, 4-pole Residual Current Circuit Breaker (RCCB) designed for protecting electrical installations from earth leakage currents and preventing electrical hazards. With a sensitivity of 30mA, this RCCB ensures enhanced safety for both residential and commercial applications. Its 4-pole configuration allows for comprehensive protection of multi-phase circuits, making it an ideal choice for various industrial and commercial settings. The BMFW440/AC30 offers reliable protection against electrical shocks, fire risks, and other safety concerns associated with fault currents.