ABB S251-L6 DIN Rail Mounting Circuit Breaker

ABB S251-L6 is a DIN-rail mounted, single-pole miniature circuit breaker (MCB) designed to protect a single live conductor in 1‑phase electrical systems. Rated at 6 A and suitable for up to 277 VAC, it provides overcurrent protection for branch circuits in commercial or industrial panel enclosures, such as lighting runs or control circuits fed from a 277 VAC supply. The unit belongs to ABB's S251 family and is configured for straightforward DIN rail installation, enabling compact, modular panel designs. This 1P device combines a robust mechanical form with a compact footprint to maximize enclosure space while delivering dependable protection for low‑voltage distribution in environments where DIN rail mounting is standard.