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The Siemens 5SY4103-8 is a 1-pole miniature circuit breaker from the SENTRON series, designed for reliable circuit protection in industrial and mechanical engineering applications. It operates with an AC supply voltage of up to 400V and has a rated operational current of 3A at 35°C.
This circuit breaker features a D tripping characteristic and a switching capacity of 10kA according to EN 60898. It offers a high insulation voltage of 440V and a breaking capacity of 5kA at AC according to UL 1077 and CSA C22.2 No.235. The device is designed for DIN rail mounting and has a compact width of 18mm.
Additional features include touch protection, sealable and silicon-free properties, and the ability to install supplementary devices. The connectable conductor cross-section ranges from 0.75 mm² to 35 mm² for solid and stranded conductors, with specific limits for finely stranded conductors. The tightening torque for screw terminals is between 2.5 N·m and 3.5 N·m.
Compliance standards include IEC/EN 60898-1 and IEC/EN 60947-2. The circuit breaker is also halogen-free.
The tripping characteristic is D, designed for high inrush loads.
Breaking capacity is 10 kA per EN 60898 and 35 kA per IEC 60947-2; for DC it is 15 kA at 72V.
Solid and stranded conductors from 0.75 to 35 mm²; finely stranded with ferrule up to 25 mm². AWG range 18 to 4.
Yes, it is halogen-free as confirmed in the datasheet.
The protection class is IP20.
It complies with IEC/EN 60898-1, IEC/EN 60947-2, and UL1077.
Mechanical service life is 10,000 switching cycles.