Siemens 5SJ4106-7HG42 Single Pole Circuit Breaker

Siemens 5SJ4106-7HG42 is a 1‑pole miniature circuit breaker (MCB) rated for 6 A on 277 V AC, featuring a 10 kA short‑circuit breaking capacity (Icn) and a Type C thermal‑magnetic trip characteristic for reliable protection against moderate inrush currents. UL 489 recognition confirms its suitability for single‑phase circuits in commercial and industrial panels, making it a common choice for protecting 277 V lighting runs and general distribution loads. The device is built for insulation up to 440 V (Ui) and, in many listings, is described with a compact 1‑pole form factor that suits standard panel installations where space is at a premium. With its 70 mm installation depth, this 5SJ4‑series breaker offers a compact, dependable solution within Siemens’ line for applications requiring precise current limitation at a 6 A rating, while maintaining coordination with other protective devices in the same panel. As a Siemens part, 5SJ4106-7HG42 aligns with widely used DIN‑rail panel architectures and replacement practices for 277 V circuits, delivering predictable tripping behavior and robust fault interruption in protection schemes where a single‑pole 6 A device is specified.