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This Siemens 5SJ4 miniature circuit breaker is designed for reliable circuit protection in industrial and mechanical engineering applications. It features a single pole configuration and a D-trip characteristic, suitable for inductive loads.
The breaker has a rated operational current of 3A at 30°C and 40°C, with a maximum operating voltage of 277V AC according to UL 489 and CSA C22.2 No. 5-02. It provides a switching capacity of 10kA according to EN 60898 and 15kA according to IEC 60947-2.
Constructed with halogen-free and silicon-free materials, this circuit breaker ensures environmental compliance. It is designed for DIN rail mounting and features combined terminals for flexible connections. The device offers touch protection and is sealable for added security.
Key electrical specifications include an insulation voltage (Ui) of 440V AC and a supply voltage of 400V AC. The mechanical service life is rated for a typical 10,000 switching cycles. The breaker's dimensions are 121mm in height, 18mm in width, and 70mm in depth, with an installation depth of 70mm.
The rated operational current is 3A at 30-40°C. At elevated temperatures it derates to 2.9A at 45°C, 2.8A at 50°C, 2.7A at 55°C, and 2.6A at 60°C.
It has a D-trip characteristic, designed for high inrush applications.
The breaking capacity is 10 kA per EN 60898 and 15 kA per IEC 60947-2.
It mounts on a standard DIN rail and occupies 1 modular width unit (18 mm).
Height 121 mm, width 18 mm, depth 70 mm, net weight 173 g.
Overvoltage category 3 and pollution degree 3.
Maximum DC operating voltage is 60 V for single-channel and 125 V for 2-channel per UL 489/CSA. Rated DC operating voltage is 60 V.