ABB S502 K-2.1 2-Pole Molded Case Circuit Breaker

ABB S502-K2.1 is a two-pole molded-case circuit breaker (MCCB) in ABB’s S500‑K heavy‑duty family, designed for DIN‑rail mounting in low‑voltage distribution panels. It delivers thermal‑magnetic overcurrent protection with a nominal current rating of 2.1 A and a K‑curve trip characteristic. The device is rated for UL 1077 applications up to 277/600 VAC and for IEC standards up to 690 VAC, with an interrupting rating of 30 kA, enabling it to handle short‑circuit events in typical commercial and light industrial circuits. As a 2‑pole unit, it disconnects both conductors simultaneously for safe isolation of the protected circuit, making it suitable for protecting branch circuits in panel boards and control panels where tight current ratings and reliable isolation are required. The compact molded‑case design and standard 2‑pole configuration align with common panel‑board layouts and help simplify installation in new builds or upgrades.