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This Siemens 5SJ4303-7HG42 is a 3-pole miniature circuit breaker designed for reliable circuit protection. It features a C-trip characteristic and a rated operational current of 3A at 30°C, with a breaking capacity of 10kA according to EN 60898 and 15kA according to IEC 60947-2.
The breaker is suitable for AC/DC operation with an insulation voltage of 440V AC and a rated supply voltage of 400V AC. It is UL 489 rated for 480/277V AC and supports DC operation up to 125V in a 2-channel configuration.
Designed for industrial and mechanical engineering applications, this circuit breaker mounts on a standard DIN rail. It has a mechanical service life of 10,000 switching cycles and features touch protection. The dimensions are 121mm in height, 54mm in width, and 70mm in depth, with an installation depth of 70mm.
Environmental considerations include a degree of pollution of 3 and vibration resistance up to 50 m/s². The protection class is IP20 with connected conductors and IP40 in the handle range.
The maximum operating voltage is 277V AC (according to UL 489 and CSA C22.2 No. 5-02), 60V DC (single channel), and 125V DC (2-channel).
The package contains 1 unit. Package dimensions are 57.00 x 125.00 x 84.00 mm.
The rated switching capacity is 10 kA according to EN 60898 and 15 kA according to IEC 60947-2.
The insulation voltage (Ui) is 440 V AC.
Finely stranded conductors with ferrule from 0.75 mm² to 25 mm² can be connected.
The typical mechanical service life is 10,000 switching cycles.
The degree of pollution is 3, suitable for industrial environments.