Vacuum Capacitor

The vacuum capacitor is used in long-wave, medium-wave, short-wave, and ultra-short-wave transmitters, as well as high-frequency high-voltage equipment, serving as components for tuning, coupling, filtering, neutralization, and DC isolation. It is also applied in high-energy particle accelerators and dielectric loss testing equipment. In recent years, the vacuum capacitor has been further expanded into medical devices and high-frequency induction heating furnaces. Compared with other dielectric capacitors (such as air dielectric capacitors, ceramic capacitors, oil-immersed capacitors, gas-filled capacitors, and film dielectric capacitors), the vacuum capacitor has the following unique characteristics:

• High rated voltage - The high dielectric strength of vacuum, combined with no dust contamination and temperature influence, allows its withstand voltage to reach several hundred kilovolts.
• Low loss and high rated current - Due to vacuum dielectric and low-loss insulating housing with oxygen-free copper electrode structure, even under natural convection cooling, it can carry large RF currents at high frequencies. With special water-cooling structures, RF current can reach hundreds or even thousands of amperes.
• Light weight and small size - For a given capacitance, rated voltage, and low loss, the vacuum capacitor occupies the smallest space compared with other capacitors.
• Wide capacitance range - The ratio between maximum and minimum capacitance can reach up to 150:1, ranging from a few picofarads to several thousand picofarads, making it an ideal component for wide tuning applications.
• Self-healing capability against overvoltage - The vacuum capacitor can withstand instantaneous overvoltage, while other capacitors may suffer permanent damage.
• High-altitude operation capability - Vacuum sealing enables the vacuum capacitor to operate in high-altitude environments without performance degradation.

Order full-process visual management is implemented. Standard product lead time is 20–40 days, with priority scheduling for repeat orders. Production progress updates such as photos/videos can be provided as needed. Products come with a 1–2 year warranty, with compensation or replacement for any damage upon arrival. Dedicated market personnel handle after-sales service and provide long-term technical support.

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