ABB SU203M-C20 Safety Relay Module 24VDC Coil

ABB SU203M-C20 is a three‑pole miniature circuit breaker (MCB) in ABB’s SU protection family, delivering branch‑circuit protection for three‑phase loads. It is rated at 20 A with a Type C magnetic trip characteristic for moderate inrush currents, and a short‑circuit breaking capacity of up to 10 kA. The device supports applications up to 480Y/277 V AC (and DC support to about 96 V), making it versatile for industrial electrical distributions and panel installations requiring reliable overload and short‑circuit protection. The SU203M-C20 designation identifies a 3P, 20A device suited for integration into standard ABB control panels and distribution boards to automatically disconnect power when faults occur.