ABB ST203M-K60 Soft Starter

ABB ST203M-K60 is a molded-case circuit breaker in ABB’s ST200M family, rated for 60 A and designed for 480Y/277 V AC power distribution. It provides overcurrent protection with a 10 kA short-circuit rating and a K-curve trip characteristic, and it is UL 1077-listed as a supplementary protector. The device is identified in ABB catalogs and distributor listings by ABB part number 2CDS273334R0587, commonly described as ST203M-K60 with a 60 A rating and 480Y/277 V input. This compact protection device is intended for installation in electrical panels and control cabinets to safeguard branch circuits against overloads and short circuits, and it is widely available through ABB-authorized distributors.