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This Siemens 5SJ4125-8HG40 is a 1-pole miniature circuit breaker designed for reliable circuit protection. It features a D-type tripping characteristic and a rated current of 25A, suitable for operation up to 40°C without derating.
The breaker has a high switching capacity of 10kA according to EN 60898 and 15kA according to IEC 60947-2, ensuring robust protection against overcurrents. It operates on AC/DC voltage with a rated supply voltage of 400V AC and a maximum operating voltage of 120V AC or 60V DC.
Designed for mechanical engineering and industrial applications, this circuit breaker mounts on a standard DIN rail and has a compact width of 18mm, corresponding to 1 modular width unit. It includes features like touch protection and is sealable for added security. The terminals accept conductor cross-sections from 0.75mm² to 25mm².
Environmental considerations include a halogen-free design and a pollution degree of 3. The breaker is built for a typical mechanical service life of 10,000 switching cycles.
The operational current rating is 25A at 30°C and 40°C.
The rated supply voltage is 400V AC, with a maximum operating voltage of 120V AC or 60V DC.
The switching capacity current is 10 kA according to EN 60898 and 15 kA according to IEC 60947-2.
This is a 1-pole miniature circuit breaker.
The tripping characteristic class is D.
It is designed for DIN rail mounting.