The SU203MR-K30 is a three-pole miniature circuit breaker designed for overcurrent protection. It features a K tripping characteristic, a rated current of 30 A, and a rated operational voltage of 400 V AC per IEC 60947-2. This MCB has an interrupting rating of 10 kA according to UL 489 and is also compliant with CSA 22.2 No. 5 standards. The device accommodates ring-tongue terminals and has a total power loss of 10.5 W. It is designed for use in industrial and commercial applications requiring robust circuit protection.