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The Siemens 5SY4320-8 is a 3-pole miniature circuit breaker designed for industrial and mechanical engineering applications. It operates with a rated voltage of 400V AC and a rated current of 20A at 35°C, with derating at higher temperatures.
This circuit breaker utilizes a Type D tripping characteristic, making it suitable for protecting circuits with high inrush currents. It offers a significant switching capacity of 10kA according to EN 60898 and up to 20kA according to IEC 60947-2. The device is designed for DIN rail mounting and features terminals compatible with solid and stranded conductors from 0.75 mm² to 35 mm².
Key features include a mechanical service life of 10,000 switching cycles, an overvoltage category of III, and IP20 protection with connected conductors. It is also halogen-free and sealable, contributing to safety and application flexibility.
| 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 20 A at 35°C, with derating at higher temperatures.
The rated voltage is 400 V AC.
This circuit breaker has 3 poles.
The switching capacity is 10 kA according to EN 60898 and 20 kA according to IEC 60947-2.
It features a Type D tripping characteristic.
It is designed for DIN rail mounting.