Metallized Ceramic Components
Ceramic Vacuum Capacitors
Ceramic vacuum capacitors including fixed CKT, variable CKTB, and water-cooled variable CKTBS types, designed for high-voltage and high-frequency RF applications with low dielectric loss and reliable mechanical performance.
Description
TecCera supplies ceramic vacuum capacitors for high-frequency, high-voltage, RF, industrial heating, broadcasting, and vacuum electronic applications.
The main product types include:
- Fixed Ceramic Vacuum Capacitors (CKT)
- Variable Ceramic Vacuum Capacitors (CKTB)
- Water-Cooled Variable Ceramic Vacuum Capacitors (CKTBS)
Ceramic vacuum capacitors combine excellent electrical insulation, low dielectric loss, high voltage capability, and reliable RF performance. Different capacitance ranges, voltage ratings, current ratings, and mechanical configurations can be supplied according to application requirements.
Product Types
Fixed Ceramic Vacuum Capacitors – CKT
Fixed ceramic vacuum capacitors provide a stable capacitance value and are suitable for RF circuits, high-frequency equipment, and high-voltage systems requiring reliable and consistent electrical performance.
Variable Ceramic Vacuum Capacitors – CKTB
Variable ceramic vacuum capacitors allow capacitance adjustment within a specified range, making them suitable for tuning, matching, impedance adjustment, and high-frequency resonant circuits.
Water-Cooled Variable Ceramic Vacuum Capacitors – CKTBS
Water-cooled variable ceramic vacuum capacitors are designed for higher-power applications where efficient heat dissipation is required. Integrated water cooling helps maintain stable operation under high RF current and continuous-duty conditions.
Key Technical Parameters
|
Parameter |
Typical Description |
|
Capacitance |
Fixed capacitance or variable capacitance |
|
Peak Test Voltage |
Typically approximately 1.4 × rated operating voltage |
|
High-Frequency Peak Operating Voltage |
Typically 60%–70% of rated peak test voltage |
|
RF Current |
Specified according to capacitor type and application |
|
Dielectric Loss |
Low-loss design for high-frequency operation |
|
DC Leakage Current |
Controlled according to rated voltage and design |
|
Mechanical Life |
Typically 5,000–20,000 adjustment cycles for variable types |
|
Cooling Method |
Natural cooling or water cooling, depending on model |
|
Customization |
Available according to voltage, capacitance, current, and dimensional requirements |
Electrical Performance
Capacitance
Ceramic vacuum capacitors are available in both fixed-capacitance and variable-capacitance configurations.
The required capacitance range can be selected according to the operating frequency, circuit design, and matching requirements.
Peak Test Voltage
The peak test voltage is typically designed at approximately 1.4 times the operating voltage, providing a safety margin for high-voltage applications.
High-Frequency Peak Operating Voltage
The allowable high-frequency peak operating voltage is typically approximately 60%–70% of the rated peak test voltage.
Actual operating limits depend on frequency, cooling conditions, capacitance, and system design.
RF Current Capability
Ceramic vacuum capacitors are designed to carry high RF currents while maintaining stable electrical characteristics and low internal losses.
The allowable RF current depends on:
- Operating frequency
- Capacitance
- Electrode structure
- Cooling method
- Ambient conditions
- Duty cycle
Low Dielectric Loss
The ceramic and vacuum dielectric structure provides low dielectric loss, making these capacitors suitable for high-frequency and RF applications where efficiency and thermal stability are important.
DC Leakage Current
Low DC leakage current helps maintain stable high-voltage performance and reliable electrical insulation.
Mechanical Performance
Variable ceramic vacuum capacitors are designed for repeated mechanical adjustment.
Typical mechanical life is approximately:
5,000–20,000 adjustment cycles
Actual service life depends on the capacitor design, adjustment mechanism, operating environment, and usage conditions.
Typical Applications
Ceramic vacuum capacitors are widely used in:
- RF generators
- Semiconductor processing equipment
- Plasma systems
- Induction heating equipment
- High-frequency welding
- Broadcasting transmitters
- Communication equipment
- RF matching networks
- High-voltage power supplies
- Vacuum electronic equipment
- Scientific research equipment
- Industrial heating systems
Custom Ceramic Vacuum Capacitors
TecCera can support custom ceramic vacuum capacitor solutions according to customer requirements.
Customization can include:
- Capacitance range
- Fixed or variable capacitance
- Rated voltage
- RF current
- Cooling method
- Mechanical structure
- Mounting interface
- External dimensions
Customers can provide drawings, technical specifications, operating frequency, voltage, RF current, and cooling requirements for evaluation.
Technical Resources
Download the TecCera brochure for metallized alumina components, ceramic-to-metal brazed assemblies, hermetic seals, and vacuum feedthrough solutions.
Download Metallized Ceramics Brochure (PDF)How to Get a Quote
Send us your drawing or technical requirements. We will review the material, dimensions, tolerances and application conditions before quotation.
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