ABB S273-K20A Molded Case Circuit Breaker, 3-Pole

ABB S273-K20A is a 3-pole molded-case circuit breaker rated for 277/480 VAC with a 20 A operating current, part of ABB's S273-K family. This thermal-magnetic breaker employs a K-curve trip characteristic and is designed for DIN rail mounting in standard electrical enclosures, with an IP20 protection rating. It provides reliable protection for 3-phase distribution circuits in industrial panels and power feeds, offering robust short-circuit protection and straightforward integration with ABB control gear. Typical applications include protection of branch circuits in control panels and 3-phase distribution buses that run on 277/480 VAC systems.