Siemens 5SJ4114-8HG42 Miniature Circuit Breaker

Siemens 5SJ4114-8HG42 Miniature Circuit Breaker is a UL 489-listed, single-pole protective device from the SENTRON 5SJ4 family, engineered for reliable overcurrent protection in low-voltage electrical installations such as control panels, distribution boards, small machinery, and branch circuits where space is at a premium. It is rated for 440 V AC and has an In rating of 0.3 A, delivering a 10 kA short-circuit breaking capacity to rapidly interrupt faults, while minimizing nuisance trips in normal operation. The device uses a Type D tripping characteristic and is designed for up to 20,000 switching cycles, ensuring long-term performance in environments with frequent operation and occasional inrush currents. With its compact one-pole form factor and Siemens UL 489 compliance, the 5SJ4114-8HG42 is a common choice for control cabinets, small power distribution modules, and equipment enclosures where certified overcurrent protection and compatibility with other 5SJ4 components are desirable.