Asea Brown Boveri Ltd S272-K10A Circuit Breaker

ABB S272-K10A is a DIN-rail mounted, two-pole molded‑case circuit breaker rated for 10 A in 277/480 VAC service, designed to protect industrial feeders and control circuits from overcurrent and short circuits. It belongs to ABB’s legacy S272 family and uses a K‑Curve trip characteristic, offering predictable instantaneous response for fault currents while accommodating normal inrush in typical motors or transformers. The compact, plug‑in form factor supports quick installation in standard panel boards and control cabinets, and its DIN rail mounting simplifies field retrofits or routine replacements in 277/480 VAC distributions. Key specifications include: 2 poles; 10 A rating; voltage rating 277/480 VAC; K‑Curve; DIN rail mounting; part number S272‑K10A. This model has been listed as discontinued by the manufacturer, so current availability generally depends on legacy stock or secondary suppliers.