ABB ST201M-D50 Safety Relay Module IP20 DIN Rail

ABB ST201M-D50 is a single-pole miniature circuit breaker (MCB) in ABB’s System Pro M Compact ST200M family, designed for DIN-rail mounting in 230 VAC circuits. With a 50 A rating and a Type D trip curve, it provides short-circuit protection up to 10 kA at 230 VAC and an IP20 enclosure suitable for indoor control panels. The device's dimensions are 88 mm in height, 17.5 mm in width, and 69 mm in depth, and it is intended for DIN-rail mounting in standard panel assemblies while operating from -25°C to 55°C. Catalog entries list it as 2CDS271001R0501/S201M-D50 with UL 1077 recognition, reinforcing its use in compliant electrical installations. Typical applications include protecting branch circuits in industrial control panels and motor-starting circuits where a 50 A protective device is required.