The ABB 2CSF204001R3250 is an air-cooled type-FF molded case circuit breaker, with a 20 A, 400 V rating. It is designed for short-circuit protection of low voltage systems, such as motors, transformers, and other electrical equipment. The breaker has a common trip mechanism, which ensures that all poles are tripped in the event of an overload or short-circuit. It includes a thermal-magnetic trip mechanism, an under voltage trip device, and a fault indicator light that allows for easy troubleshooting. The breaker also features an auxiliary current-limiting contact for improved protection against short-circuit faults and higher fault currents. The molded case design provides improved durability and easier handling.