ABB ST201M-K1 Smart Relay Module 24V DC Industrial Automation

ABB ST201M-K1 is a 1-pole miniature circuit breaker from ABB’s System pro M compact ST200M family, designed to protect control and automation circuits in industrial panels. It carries a rated current of 1 A (In) and is rated for up to 480Y/277 V AC, making it suitable for branch circuits in mixed-voltage distributions commonly found in modern industrial installations. The device provides a maximum breaking capacity of 10 kA (Icu), and uses a Type K curve for its thermal-magnetic protection, which offers reliable response to overloads and short circuits in typical motor and general-purpose loads. The ST201M-K1 is UL 1077-listed, ensuring compliance for supplementary protection applications in the U.S. and other regions that recognize UL listings, and is RoHS compliant. As part of ABB’s ST200M compact lineup, it is designed for compact panel layouts where space and reliability matter, enabling straightforward replacement and consistent protection across automation panels. Whether used in small motor starters, control panels for conveyors, or general industrial control circuits, the ST201M-K1 provides predictable protection with ABB’s manufacturing standards and a compact form factor that integrates with ABB’s broader distribution and protection ecosystem.