ABB SU203M-K3 is a 3-pole miniature circuit breaker from ABB’s System pro M Compact family, designed for DIN-rail mounting in industrial control panels. This K-characteristic device is rated In = 3 A and provides a short-circuit breaking capacity of 10 kA, with UL489 listing, and it occupies three module widths in a standard 3P configuration. It’s intended for three-line protection within control cabinets and enclosures, offering compact, reliable circuit protection in ABB’s modular system.
