1SYS273112R0504

The ABB 1SYS273112R0504 Miniature Circuit Breaker (MCB) is a low-voltage electrical protection device from ABB’s System pro M compact SB200M series. It is designed to protect electrical circuits against overload currents and short-circuit faults in residential, commercial and industrial electrical distribution systems.

This model has a rated current of 50 A, a C-type tripping characteristic and a rated short-circuit breaking capacity of up to 10 kA at the specified voltage. Its thermal tripping mechanism provides delayed protection against sustained overloads, while its electromagnetic tripping mechanism enables rapid circuit interruption during short-circuit conditions.

The device features a three-phase-plus-neutral configuration (3P+N), also known as TPN, for compatible three-phase electrical distribution systems. Its compact construction supports installation in suitable distribution boards and switchgear assemblies. The insulating enclosure and current-limiting design contribute to safe and reliable operation when the breaker is correctly selected, installed and maintained.