ABB ST203M-C32 2-Channel Safety Relay Module

ABB ST203M-C32 is a three‑pole miniature circuit breaker in the System Pro M Compact family (S200M series) designed to protect three‑phase circuits with a 32 A nominal rating. It uses a C‑curve trip characteristic suitable for loads with moderate inrush and is rated for up to 400 V AC, with an impulse withstand of 4 kV. The device is capable of interrupting short‑circuit currents up to 25 kA at 230 V and 15 kA at 400 V (Icu), and its short‑circuit current rating (Icn) is 10 kA. It occupies a 3‑pole width (3 TE) on a DIN rail and accepts conductors from 0.75 to 25 mm² for multi‑strand and 0.75 to 35 mm² for single‑strand connections. The enclosure provides IP20 protection, and it operates in ambient temperatures from −25 °C to 55 °C. These ratings align with ABB System Pro M Compact protection devices intended for distribution panels and feeder circuits in industrial and commercial installations.