Miniature circuit breaker 400V T=70mm 25kA according to EN 60947-2, 3P+N, D20 The miniature circuit breaker is the automatic circuit breaker for short-circuit protection. The miniature circuit breakers from Siemens, as an important component of the SENTRON protection components for electrical installations, offer effective protection for people and systems by safely switching off in the event of overload and short circuit. Convenient installation and connection technology, uniform additional components and a consistent design - these are the characteristics of the device family. Whether for infrastructure or industrial requirements, Siemens offers miniature circuit breakers for all applications and every area of use. The Siemens miniature circuit breakers are characterized above all by: 1. Effective protection for people, investments and systems against overload and short circuit. 2. A wide range of uniform accessories that are easy to install and can be replaced at any time. 3. Reliable safety during installation thanks to the anti-touch and anti-reach protection included as standard. 4. Tool-free removal from the top-hat rail or from the busbar assembly thanks to convenient manual slider operation. 5. Clearly visible switch position display. 6. Data matrix code on the front of the device provides all information about the miniature circuit breaker quickly and easily. 7. Protection in accordance with standards with worldwide approvals. www.siemens.de/cable-circuit-breaker. Siemens offers a comprehensive portfolio of protection, switching, measuring and monitoring devices, distribution systems as well as switches and sockets for safe, efficient electrical infrastructure in buildings and industry.
| Property | Value |
| Rated current: | 20 A |
| Rated voltage: | 400 V |
| Type of voltage: | AC |
| Width in modular spacing: | 4 |
| Number of poles (total): | 4 |
| Additional equipment possible: | yes |
| Overvoltage category: | 3 |
| Installation depth: | 70 mm |
| Rated switching capacity Icu according to IEC 60947-2 at 230 V: | 30 kA |
| Rated switching capacity Icu according to IEC 60947-2 at 400 V: | 30 kA |
| Pollution degree: | 3 |
| Switching neutral conductor: | yes |
| Rated insulation voltage Ui: | 440 V |
| Rated impulse withstand voltage Uimp: | 4 kV |
| Ambient temperature during operation: | -25 to 55 °C |
| Connectable conductor cross-section, stranded: | 0.75 to 35 mm² |
| Connectable conductor cross-section, single-wire: | 0.75 to 35 mm² |
