ABB SU203M-C30 Miniature Circuit Breaker 3P 30A

The ABB SU203M-C30 is a three-pole miniature circuit breaker (MCB) rated for 30 A with a C-curve trip characteristic, specifically designed to protect three-phase circuits in commercial and light-industrial panels. UL489-listed with a 10 kA short-circuit breaking capacity, it supports up to 480 VAC (277 VAC line-to-neutral), making it suitable for distribution boards that handle motor loads, lighting, and other general-purpose equipment. Mounted on standard 35 mm DIN rails, the SU203M-C30 is part of ABB's SU200M family, providing reliable, plug-in protection in panel boards, control cabinets, and automation enclosures. Key electrical ratings at a glance: 3 poles, In 30 A, Vmax up to 480 VAC (277 V to neutral), characteristic C, and Icn 10 kA, UL489-listed. Its rugged construction and ABB manufacturing standards make it a common choice for safeguarding three-phase feeders in commercial buildings, manufacturing lines, and HVAC systems.