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This Siemens 5SJ4 miniature circuit breaker is a 1-pole device designed for reliable circuit protection. It features a tripping characteristic class C and an operational current of 0.5A at 40°C, with a rated switching capacity of 10kA according to EN 60898 and 15kA according to IEC 60947-2.
The breaker operates at a rated supply voltage of 400V AC and has an insulation voltage (Ui) of 440V AC. It is suitable for environments regarding EMC and has a protection class IP20 with connected conductors.
Designed for mechanical engineering and industrial applications, this circuit breaker mounts on a standard DIN rail and has a width of 18mm, corresponding to 1 modular width unit. It is halogen-free, sealable, and silicon-free, offering enhanced safety and environmental compliance. The connection terminals accept finely stranded conductors with core end processing from 0.75 mm² to 25 mm², with a maximum tightening torque of 3.5 N·m.
The supply voltage is 400 V AC at 50 Hz. For UL/CSA applications the maximum AC operating voltage is 120 V; for DC operation the maximum is 60 V.
The tripping characteristic is type C, designed for moderate inrush currents.
The rated operational current at 30 °C and 40 °C is 0.5 A, with slight derating at higher temperatures.
The device has IP20 protection (with connected conductors) and IP40 in the handle range.
Yes, the product is halogen-free as per the datasheet.
It is approved by CCC, CE, CSA, EAC, UL, and VDE.
The mechanical service life is 10,000 switching cycles.