What this part is and what the ratings mean
The ABB S201-K13 is a 1-pole miniature circuit breaker from the S200 series, rated 13 A with a Trip Curve K characteristic at 277 V AC. It carries a 6 kA interrupting capacity and is listed as a UL 1077 supplemental protector (CSA 22.2). The K-curve means the magnetic trip threshold is set to 10–14× rated current — designed for inductive loads like motors, transformers, and solenoid valves where inrush current would nuisance-trip a C-curve breaker. At 13 A, this is sized for a moderate branch circuit feeding a single motor or a small group of inductive devices.
Where it fits and how it mounts
Snaps onto standard DIN rail in the panel. Single-pole format occupies one modular width (17.5 mm). The S200 series shares the same footprint across the range, so swapping a C-curve for this K-curve unit or changing amp ratings requires no rail or busbar rework. Terminal design accepts copper conductors up to 25 mm².