ABB SU203M-K63 Industrial Safety Relay Module

The ABB SU203M-K63 is a three‑pole UL489 miniature circuit breaker with a K‑curve, rated for 63 A and 240 V AC, engineered for DIN rail mounting in System pro M compact panels. It also accommodates 96 V DC and delivers up to 10 kA interrupting capacity at 240 V AC (and up to 15 kA at 400 V AC per ABB specifications), meeting UL489, IEC/EN 60947-2, and CSA 22.2 No. 5 standards. Dimensions are approximately 69 mm long, 35 mm wide, and 111 mm high, with a listed weight around 0.39 kg, and it uses screw terminals for connection. The K‑characteristic indicates a moderate magnetic tripping response suitable for protecting motors and other inductive loads in 3‑phase circuits; operating temperature range is -25 to 55 C, and the enclosure is rated IP20/IP40 for panel mounting. As part of ABB’s SU200M family, it is designed for robust industrial protection in compact installations.