ABB ST201M-B3 Time Relay

ABB ST201M-B3 is a 1-pole miniature circuit breaker from ABB’s System pro M compact ST200M family, intended to provide overcurrent protection for single-branch circuits in low‑voltage distribution panels and control circuits. The model is rated at 3 A with a B-curve trip characteristic and an interrupting capacity of 10 kA at 240 V AC (277 V AC in some regional catalogs) and 60 V DC, and it carries UL 1077 recognition for supplementary protectors. The standard catalog number is 2CDS271334R0035, with regional variants such as ST201M-B3NA available for North American markets. This device is typically used to safeguard branch circuits in commercial and industrial installations where compact, reliable single‑pole protection is required for lighting, small loads, and control circuits.