The ABB S204‑D40 is a 4‑pole miniature circuit breaker (MCB) from ABB’s System pro M / S200 compact series designed to provide reliable overload and short‑circuit protection in low‑voltage AC electrical distribution systems. It features a Type D trip curve, which offers enhanced tolerance to high inrush currents typical of motor loads, transformers, and other heavy inductive equipment. The breaker is DIN‑rail mountable and includes screw‑type terminals with clear ON/OFF indication, making it suitable for residential, commercial, and light industrial applications where robust circuit protection is required.
