The ABB S201-C50 is a 1-pole miniature circuit breaker rated 50 A with Trip Curve C, interrupting 6 kA at 277 VAC. It snaps onto DIN rail for panel integration — the standard footprint for distribution boards and control enclosures.
Panel fit and derating
Single-pole format occupies one DIN-rail module (17.5 mm). In a crowded panel, the 50 A rating at 277 VAC means the breaker can feed a single-phase branch circuit at that voltage. When grouping multiple breakers in an enclosure, apply the standard thermal derating per IEC 60898 — typically 80 % of rated current for a row of six or more — to keep the internal temperature rise within the terminal rating.