1. Electricity - Electronics
  2. Switch and Relay
  3. Vacuum circuit breaker
  4. Siemens Medium-voltage – Power distribution

Vacuum circuit breaker 3AK7 series

vacuum circuit breaker
vacuum circuit breaker
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Electrical characteristics
medium-voltage, high-current
Number of poles
Other characteristics
compact, indoor
Primary current

1,250 A, 2,000 A, 3,150 A, 4,000 A


7.2 kV, 12 kV, 15 kV, 17.5 kV


Vacuum circuit breakers in the 3AK7 series are available in versions from 7.2 to 17.5 kV. The vacuum circuit breakers are very compact, with a distance between pole centers of just 210 or 280 mm, and they’re perfectly suited for use in medium-voltage switchgears thanks to their high mechanical strength and low space requirement. High-voltage and generator versions are available with the same dimensions and can be used for smaller generator switching applications in accordance with IEEE specifications up to 50 kA, and also for high-voltage applications.


*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.