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The Siemens 5SJ4120-6HG40 is a 1-pole miniature circuit breaker designed for reliable circuit protection. It operates with a rated supply voltage of 400V AC and has a current rating of 20A at 30°C, with derated values at higher temperatures.
This circuit breaker features a B tripping characteristic, suitable for applications requiring specific overcurrent protection curves. It offers a switching capacity of 10kA according to EN 60898 and 15kA according to IEC 60947-2, with a short-circuit breaking capacity of 14kA according to UL 1077.
The device is designed for DIN rail mounting and has a mechanical service life of typically 10,000 switching cycles. It includes features such as touch protection and is halogen-free. The dimensions are 90mm in height, 18mm in width, and 70mm in depth, with an installation depth of 70mm.
The operational current rating is 20A at 30°C, with derated values at higher temperatures.
The rated supply voltage is 400V AC.
The switching capacity is 10 kA according to EN 60898 and 15 kA according to IEC 60947-2.
It is designed for DIN rail mounting.
The tripping characteristic class is B.