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The Siemens 5SJ4230-7HG42 is a 2-pole miniature circuit breaker designed for reliable circuit protection. Part of the SENTRON 5SJ4 series, it operates with a C tripping characteristic and provides a switching capacity of 10kA according to EN 60898.
This circuit breaker has a rated operational current of 30A at 30°C and 40°C, with derated values at higher temperatures. It supports AC/DC operation with a maximum operating voltage of 277V AC and 60V DC. The device features a DIN rail mounting type and a compact design with a width of 36mm, corresponding to 2 modular width units.
Key electrical specifications include an insulation voltage (Ui) of 440V AC and a supply voltage frequency of 50 Hz. The protection class is IP20 with connected conductors. The breaker is also halogen-free and features touch protection for enhanced safety.
Designed for industrial and mechanical engineering applications, the 5SJ4230-7HG42 ensures robust protection. It has a mechanical service life of typically 10,000 switching cycles and is suitable for environment B regarding EMC.
The operational current rating is 30A at 30°C and 40°C.
It has 2 poles.
The switching capacity is 10 kA according to EN 60898 and 15 kA according to IEC 60947-2.
The tripping characteristic class is C.
The rated supply voltage at AC is 400 V, and the maximum operating voltage at AC according to UL 489 is 277 V.
It is designed for DIN rail mounting.