ABB SU203M-K7 is a three‑pole System pro M compact miniature circuit breaker (MCB) designed to protect 3‑phase circuits in industrial control panels. It is rated for 480Y/277 VAC operation with a Type K (K‑curve) tripping characteristic and provides a short‑circuit breaking capacity of 10 kA, making it suitable for protecting feeders and distribution circuits in harsh industrial environments. The unit is UL 489 listed, features a lever‑operated handle, and uses box lug terminals, aligning with DIN rail mounting in ABB’s System pro M compact family for reliable overload and short‑circuit protection in panels, switchboards, and motor‑control centers.
