The ABB E3N2500 R2500 PR121/P PR122/P is a high-performance motor protection circuit breaker (MPCB) from ABB’s SACE series. It is specifically designed to provide reliable protection for motors, transformers, and electrical circuits in industrial, commercial, and residential applications. With a rated current of 2500 A, this breaker integrates various protection types, including overload protection, short-circuit protection, thermal protection, and ground fault protection (LSIG), into a single device. It is ideal for high-power applications where robust protection and selective fault isolation are required.