ABB ST201M-C1 Industrial Compact Safety Relay Module

ABB ST201M-C1 is a compact single-pole miniature circuit breaker from ABB’s System pro M compact line, designed to protect industrial control panels and machines from overload and short-circuit conditions. It is rated for 1 A and uses a C-curve trip characteristic, with a short-circuit current rating of 10 kAIC, and is suitable for 480Y/277 V systems (UL 1077 listed). The device is DIN-rail-mountable and compatible with ABB's S200M/System pro M compact family, with alternate catalog numbers such as 2CDS271334R0014 and 2CDS271335R0014, and North American variant ST201M-C1NA. Typical applications include protecting single-phase circuits in conveyors, machine controls, and automation cabinets, where fast disconnection on overload or short circuit is required. The ST201M-C1 provides reliable overcurrent protection while allowing straightforward re-arming after a fault, making it a practical choice for compact panel design.