ABB S203-C50 Miniature Circuit Breaker, 50A, 3P, Curve C

The ABB S203-C50 is a 3-pole miniature circuit breaker rated for 50 A continuous current, with a C-trip curve that provides a moderate inrush tolerance — it holds through the starting surge of motor loads and transformer banks, then clears on sustained overloads faster than a D-curve would. That 50 A rating, combined with the 6 kA interrupting capacity at 277 VAC line-to-neutral, means it can safely interrupt a fault up to that level without welding contacts or cascading damage upstream. The DIN rail footprint keeps it in standard panel layout, so it slots into the same backplane as the rest of the S200-series breakers.