The ABB S204‑D20 is a 4‑pole miniature circuit breaker (MCB) from ABB’s System pro M / S200 series, featuring a D‑type trip characteristic. It is designed to provide overload and short‑circuit protection for low‑voltage AC distribution circuits and is suitable for residential, commercial, and light industrial applications. The D‑curve trip characteristic gives the breaker higher tolerance to high inrush currents such as those from motors and transformers, while still delivering dependable protection. The breaker mounts on a standard DIN rail and includes screw‑type terminals for secure wiring.
