ABB ST201M-C4 2CDS271334R0044 Circuit Breaker

ABB ST201M-C4 is a 1-pole miniature circuit breaker from the ST200M family, identified by catalog 2CDS271334R0044, delivering 4 A of overload and short‑circuit protection for 277 V AC circuits on a standard DIN rail. It features a C‑curve trip characteristic and a 10 kA interrupting capacity at 277 V AC, making it suitable for protecting single‑phase loads such as lighting and other small 277 V circuits in commercial panels. Designed for DIN rail mounting in control cabinets, the unit measures approximately 69 mm long, 17.5 mm wide, and 88 mm high and is compatible with 35 mm DIN rails, aligning with ABB System pro M compact installations. This UL 1077‑listed device is commonly used in compact, modular panel boards where space efficiency and reliable protection for 1P circuits are required.