ABB ST201M-K63 3-Phase Soft Starter for AC Motors

ABB ST201M-K63 is a 1-pole miniature circuit breaker from ABB’s ST200M System pro M compact family, providing 63 A of overcurrent protection for branch circuits. This UL 1077-listed device is rated for up to 480Y/277 VAC and offers a 10 kA short-circuit breaking capacity (kAIC) with a K-type magnetic trip curve for rapid response to fault conditions. Designed for DIN-rail mounting in electrical panels, it features double-clamped terminals that accept up to 25 mm² flexible or 35 mm² rigid conductors, and it suits indoor panel applications with an IP20 enclosure and an operating temperature range of -25°C to +55°C. The ST201M-K63 is RoHS-compliant and forms part of ABB’s legacy ST200M protection lineup, intended for reliable protection of single-phase branch circuits in low-voltage installations; for three-phase motor protection, multiple poles or other protection arrangements are typically used.