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The Siemens 5SY4120-6 is a single-pole miniature circuit breaker from the SENTRON series, designed for reliable circuit protection in industrial and mechanical engineering applications.
This breaker operates with a rated voltage of 400V AC and a current rating of 20A. It features a Type B tripping characteristic, making it suitable for protecting circuits against overcurrents and short circuits. The switching capacity is rated at 10kA according to EN 60898 and 20kA according to IEC 60947-2.
Designed for convenience and safety, the 5SY4120-6 is suitable for DIN rail mounting and has a mechanical service life of 10,000 switching cycles. It offers a protection class of IP20 with connected conductors. The breaker is also halogen-free and sealable.
Key electrical specifications include an insulation voltage of 440V AC and a power loss of 2.2W per pole at rated current in hot operating state. It supports conductor cross-sections from 0.75 mm² to 35 mm² for solid and stranded wires.
The operational current rating for the Siemens 5SY4120-6 is 20 A at 35°C.
The rated supply voltage for the Siemens 5SY4120-6 is 400 V AC.
The tripping characteristic class for this circuit breaker is B.
This circuit breaker has 1 pole.
The switching capacity is 10 kA according to EN 60898 and 20 kA according to IEC 60947-2.
Yes, the Siemens 5SY4120-6 is halogen-free.