ABB ST203M-B13

ABB S203M-B13, part of the System Pro M Compact (S200) family, is a 3-pole miniature circuit breaker with a B-curve trip and a nominal current of 13 A, designed for DIN-rail installation in residential, commercial, and industrial panels to protect circuits from overloads and short circuits. It delivers a breaking capacity up to 25 kA at 230/400 V AC and is suitable for 3-phase circuits in standard electrical distributions. The device carries catalog number 2CDS273001R0135 and is listed in ABB catalogs as S203M-B13 (with some listings referencing ST203M-B13), reflecting its 3P configuration and 13 A rating. It complies with CEI-EN 60898-1 and CEI-EN 60947-2, and is also certified under UL1077 and CSA 22.2 No. 235, covering residential, commercial, and industrial usage. As a System Pro M Compact component, it is intended for modular DIN-rail mounting in distribution boards, offering reliable overload and short-circuit protection within ABB’s S200/S203 product line.