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This Siemens 5SJ4118-8HG42 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 D-trip characteristic and a rated operational current of 15A at AC, with a maximum operating voltage of 277V AC according to UL 489 and CSA C22.2 No. 5-02 standards. The switching capacity is 10kA according to EN 60898 and 15kA according to IEC 60947-2.
The breaker has a mechanical service life of 10,000 switching cycles and is built with touch protection. It is suitable for installation in environment B regarding EMC. The unit is halogen-free and sealable.
With a compact design measuring 18mm in width and a DIN rail mounting type, it fits standard industrial enclosures. The connection terminals accommodate finely stranded conductors from 0.75 mm² to 25 mm² with a maximum tightening torque of 3.5 N·m.
The tripping characteristic is D, suitable for high inrush current applications.
The breaking capacity is 10kA according to EN 60898 and 15kA according to IEC 60947-2.
The mechanical service life is 10,000 switching cycles.
The protection class is IP20 with connected conductors, and IP40 in the handle range.
The dimensions are 121mm height, 18mm width, and 70mm depth.
Finely stranded conductors with core end processing from 0.75 mm² to 25 mm² can be connected.
The power loss is 1.8W per pole at rated current in hot operating state.