ABB SU203M-C2 Safety Relay Module

ABB SU203M-C2 is a three-pole miniature circuit breaker (MCB) in ABB’s System pro M compact family, rated for 2 A and designed to protect 3‑phase distribution circuits from overload and short circuits. This C‑curve device features thermal‑magnetic trip protection and UL 489 certification, with a 10 kA rated breaking capacity (Icn) to safely interrupt high fault currents. The SU203M-C2 carries the ABB part number 2CDS273337R0024 and is intended for modular installation in ABB distribution panels, machine enclosures, and other three‑phase electrical systems where dependable, code‑compliant protection is required. In standard industrial practice, it serves as the protective feeder device on 3‑phase circuits, enabling reliable automatic reset after fault isolation and easy integration with other System pro M compact protection modules. The 3P, 2 A configuration makes it suitable for small to medium loads or as an upstream protection element in multi‑pole switchboards. This part is a widely catalogued component across ABB distributors and supports common electrical safety practices in industrial control and building distribution applications.