The ABB S203M‑C10 is a 3‑pole miniature circuit breaker (MCB) from ABB’s System pro M compact (S200M) range. It is designed to provide overload and short‑circuit protection for electrical circuits in residential, commercial, and industrial installations. The breaker uses a C‑curve trip characteristic, making it suitable for general electrical loads including lighting, socket circuits, and motor loads with moderate inrush current. It is DIN‑rail mountable and commonly used in distribution boards and control panels where reliable circuit protection is required.