ABB S203UP-K3 U is a 3-pole DIN-rail miniature circuit breaker rated for 480Y/277 VAC systems, with a nominal current of 3 A and a 10 kA short-circuit rating. It uses a K-curve thermal-magnetic trip mechanism, providing precise overload protection and fast response to short circuits in industrial control panels. This UL489/CSA/IEC-approved device is designed for DIN rail mounting on standard TH35-15 rails and fits ABB’s S200 UP family of compact protectors, making it suitable for distribution and branch protection in equipment racks and panel enclosures.
