The ABB S7S1250 PR211/P‑LI FF 4P is a low‑voltage molded‑case circuit breaker (MCCB) designed for industrial and commercial electrical power distribution. It is built on ABB’s Isomax S7 frame, engineered to provide reliable protection and switching for three‑phase power systems with neutral (4‑pole), and a continuous rated current of 1250 A.