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The Siemens 5SJ4204-7HG42 is a miniature circuit breaker (MCB) from the 5SJ4 series, designed for reliable circuit protection in industrial and mechanical engineering applications. This 2-pole device features a C-type tripping characteristic and a rated operational current of 4A at 30°C, with a switching capacity of 10kA according to EN 60898 and 15kA according to IEC 60947-2.
It operates with a supply voltage of 400V AC and is compliant with UL 489 standards for use up to 480/277V AC. The breaker offers a high degree of protection with IP20 rating for connected conductors and IP40 in the handle range. It supports conductor cross-sections from 0.75 mm² to 25 mm² with core end processing and has a mechanical service life of 10,000 switching cycles.
Key features include halogen-free and silicon-free construction, touch protection, and the ability to install supplementary devices. The mounting type is DIN rail, with dimensions of 121mm height, 36mm width, and 70mm depth. This circuit breaker is suitable for environments requiring immunity to interference, designated as Environment B.
The tripping characteristic is C-curve.
10 kA per EN 60898 and 15 kA per IEC 60947-2.
Rated AC supply voltage 400 V; maximum AC operating voltage 277 V (UL); DC maximum 60 V single-channel, 125 V 2-channel.
Degree of pollution is 3.
Overvoltage category is 3.
IP20, with connected conductors IP40 in the handle range.
CCC, CE, CSA, EAC, UL, VDE.