The ABB S201U-K20 (often listed as S201UK20A) is a 1-pole miniature circuit breaker rated for 20 A at 240 V AC, designed for DIN-rail installation in distribution panels. It is UL 489 listed with a 10 kA interrupting rating and uses a thermal-magnetic K-type trip characteristic, suitable for branch-circuit protection in commercial and industrial enclosures. The unit features finger-safe terminals and multi-function terminals for straightforward wiring in standard DIN-rail systems.
