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This Siemens 5SJ4120-7HG42 is a 1-pole miniature circuit breaker from the 5SJ4 series, designed for reliable circuit protection in industrial and mechanical engineering applications. It features a C-trip characteristic and a rated operational current of 20A at 30°C, with a maximum AC operating voltage of 277V according to UL 489 and CSA C22.2 No. 5-02.
The breaker provides a switching capacity of 10kA according to EN 60898 and 15kA according to IEC 60947-2, ensuring robust protection against overcurrents. It has a mechanical service life of typically 10,000 switching cycles and is suitable for installation in Environment B regarding EMC.
Designed for DIN rail mounting, this compact breaker measures 18mm in width and 70mm in depth, fitting into a single modular width unit. It features combined terminals for both top and bottom connections and offers touch protection. The device is halogen-free, sealable, and silicon-free, meeting stringent environmental and safety standards.
The operational current rating for the Siemens 5SJ4120-7HG42 circuit breaker is 20A at 30°C and 40°C.
The switching capacity is 10 kA according to EN 60898 and 15 kA according to IEC 60947-2.
The rated supply voltage is 400V AC, and the maximum operating voltage at AC according to UL 489 is 277V.
The tripping characteristic class is C.
The circuit breaker has a height of 121 mm, a width of 18 mm, and a depth of 70 mm.
Yes, the Siemens 5SJ4120-7HG42 is halogen-free.