ABB SU203M-K13 Safety Relay Module

The ABB SU203M-K13 is a three-pole miniature circuit breaker (MCB) in ABB's SU200M family, designed to protect branch circuits in low-voltage distribution panels. It is rated for 13 A (In) with a 10 kA short-circuit breaking capacity, UL489-compliant, and uses a K-curve trip characteristic for predictable interruption in lightly to moderately faulted circuits. The unit supports 277/480Y VAC and 48/96 VDC systems, with DIN rail mounting and screw-terminal connections available for installation, and it measures 69 mm long, 52.5 mm wide, and 111 mm high, weighing about 0.375 kg; the enclosure is IP20/IP40 and operates from -25 to 55 C, with wiring suitable for 18–4 AWG conductors and a light gray enclosure. The SU203M-K13 carries the order code 2CDS273337R0447 and is a 3P device designed for use in distribution boards and control panels to protect circuits from overloads and short circuits.