Custom High-Voltage Ceramic Feedthroughs

Custom High-Voltage Ceramic Feedthroughs

No. Parameter Typical Value / Specification Unit
1 Alumina Purity 95%or 99%  %
2 Bulk Density ≥ 3.63 g/cm³
3 Thermal Conductivity (25°C) 22.45 W/m·K
4 Coefficient of Thermal Expansion (20–1000°C) 8.26 ×10⁻⁶/°C
5 Flexural Strength ≥340 MPa
6 Dielectric Strength ≥8.3 kV/mm
7 Dielectric Constant (1 MHz) 9.1 @1MHz
8 Dielectric Loss (1 MHz) ≤0.0004 @1MHz
9 Metallization Layer (Mo/Mn) 15–25 μm
10 Plating Layer (Ni/Cu/Au etc.) 8–10   μm

Custom Ceramic Power Feedthroughs for High-Voltage and High-Current Applications

Transferring electrical power through a vacuum chamber or sealed enclosure requires a feedthrough that can handle the electrical load while maintaining insulation and sealing integrity. An undersized conductor or poorly matched connection interface may cause excessive heating, unstable electrical contact, or premature joint failure.

Reliable Power Transmission and Insulation

Ceramic power feedthroughs combine conductive metal pins with ceramic insulation and a metal mounting structure. The ceramic separates energized conductors from the housing, while the conductor material and cross-sectional area are selected to meet the required current and temperature limits.

Copper conductors may be suitable for high-current transmission, depending on the operating conditions and connection design. Where the assembly also requires hermetic sealing, can be evaluated as part of the joining solution.

Flexible Electrical and Mounting Configurations

Depending on the equipment, configurations may include single-pin or multi-pin assemblies, solderable connections, welded interfaces, and CF, KF, or threaded mounting options.

Meetcera’s can be evaluated when power transmission must be combined with vacuum sealing requirements.

Typical Applications

  • Vacuum furnaces and industrial heating systems

  • Semiconductor manufacturing equipment

  • Vacuum coating and deposition equipment

  • Scientific instruments and particle accelerators

  • High-voltage and high-current power systems

Request a Power Feedthrough Specification Review

Send your voltage, continuous and peak current, conductor material, pin count, mounting interface, temperature range, and vacuum requirements. Meetcera can help evaluate a suitable configuration and identify the electrical and sealing tests required for your project.

For assemblies involving specialized ceramic insulation, our can also be considered during design review.