The ABB S201MR-K6 is a 1-pole miniature circuit breaker rated 6 A with a Trip Curve K characteristic, designed for 277 V AC systems and a 10 kA interrupting capacity.
The 6 A continuous rating means this breaker carries 6 amps steady without nuisance tripping — sized for a small motor, a transformer primary, or a lighting circuit drawing under that load. The Trip Curve K gives a fast magnetic trip (typically 8–12x In) that catches inductive inrush without false trips on motor start or transformer energization.
One-pole width (about 17.5 mm) leaves room for adjacent breakers or accessories in the same row. Wire termination accepts copper conductors up to the standard cross-section for a 6 A circuit; torque to the value printed on the breaker side.