ABB SU203M-C30 Circuit Breaker

ABB SU203M-C30 is a three-pole miniature circuit breaker (UL489) rated for 30 A with a C-type trip characteristic, designed for use in 480Y/277 V AC and 96 V DC circuits in commercial and industrial panels. It offers 10 kA interrupting capacity at 480Y/277 V AC and 96 V DC, with a rated ultimate short-circuit breaking capacity of 15 kA at 400 V AC, making it suitable for distribution feeders and motor-control circuits in DIN-rail mounted enclosures. As part of the SU200M family, this 3P device is compact and DIN-rail ready for modular electrical distribution systems, and it complies with IEC/EN 60947-2, UL 489, and CSA 22.2 No. 5. With a rated current of 30 A, the SU203M-C30 is widely used in control panels, machinery feeders, and general distribution where predictable overload protection and reliable short-circuit performance are required. Physical dimensions are 69 mm long, 52.5 mm wide, and 111 mm high, and the unit has a total power loss around 10.5 W (3.5 W per pole) under rated conditions, reflecting its thermal-magnetic trip mechanism. In practice, choose this model when you need a robust, UL489-listed 30 A 3P breaker for high-demand circuits in DIN-rail panel boards.