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The Siemens 5SY4520-6 is a miniature circuit breaker designed for electrical protection in industrial and mechanical engineering applications. It features a 2-pole configuration with a 1+N pole design, operating at 230V AC with a rated current of 20A.
This circuit breaker has a tripping characteristic class B and a switching capacity of 10kA according to EN 60898. It offers a mechanical service life of 10,000 switching cycles and is suitable for overvoltage category III and degree of pollution 3 environments. The device is halogen-free and silicon-free, with combined terminals at both the top and bottom, and includes neutral conductor switching.
Designed for DIN rail mounting, the 5SY4520-6 has a compact width of 36mm, corresponding to 2 modular width units. It supports a wide range of conductor cross-sections, 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. Tightening torques for screw terminals range from 2.5 to 3.5 N·m (22-31 lbf·in).
Key technical data includes an insulation voltage of 250V AC and a maximum DC operating voltage of 72V. The protection class is IP20 with connected conductors. Power loss per pole is 2.2W at rated current in hot operating state.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.99 | $0.99 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The Siemens 5SY4520-6 operates at 240V AC.
The current rating is 20A.
The tripping characteristic class is B.
It complies with IEC / EN 60898-1, IEC / EN 60947-2, and UL 1077 standards.
The mechanical service life is approximately 10,000 switching cycles.
Yes, it is halogen-free.
Yes, it is silicon-free.