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The Siemens 5SY4303-8 is a 3-pole miniature circuit breaker designed for reliable power distribution in industrial and mechanical engineering applications. It offers a rated current of 3A at 35°C and a rated voltage of 400V AC.
This circuit breaker features a D-type tripping characteristic, providing protection against overcurrents and short circuits with a breaking capacity of 10kA according to EN 60898. It is suitable for operation in demanding environments, with a degree of pollution of 3 and an overvoltage category of III.
Designed for ease of installation, the 5SY4303-8 supports DIN rail mounting using a quick assembly system. It accommodates a wide range of conductor sizes, from 0.75 mm² to 35 mm² for solid and stranded conductors, and up to 25 mm² for finely stranded conductors with core end processing. The terminals require a tightening torque between 2.5 N·m and 3.5 N·m.
Additional features include halogen-free and silicon-free construction, sealability, and compatibility with supplementary devices. The protection class is IP20 with connected conductors.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.99 | $0.99 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The rated current is 3 A at 35 °C.
The rated voltage is 400 V.
It has 3 poles.
The tripping characteristic class is D.
The switching capacity current is 10 kA according to EN 60898.
It supports DIN Rail mounting.
It can connect solid or stranded conductors from 0.75 mm² to 35 mm², and finely stranded conductors with core end processing from 0.75 mm² to 25 mm².