How to Choose a Ceramic Vacuum Feedthrough: The Complete Selection Guide

Ceramic Vacuum Feedthrough

What Is Ceramic Vacuum Feedthrough?

The ceramic vacuum feedthrough is a ceramic to metal seals components, it is a ‘feedthrough’ hermetic connector that allows electrical power, signals, motion, or fluids to safely pass through the wall of a vacuum chamber. It uses 95% alumina ceramic as an insulator to achieve vacuum sealing, and is a critical component in many vacuum devices.

It is widely used in:

Semiconductor equipment
Vacuum chambers
High-voltage systems
Plasma and ion beam applications
Step-by-Step Feedthrough Selection Guide

1. Define Voltage Requirement (kV)

Up to 10kV → standard applications
Up to 12kV+ → high voltage systems

Example:

If you are searching for 12kV high voltage vacuum feedthrough CF flange→ consider 8 Pin 12kV models

2. Determine Current (Amps)

Multi-pin → lower current per pin
Fewer pins → higher current capacity

Example:

Need 30A high current → choose 4 Pin feedthrough
Need multiple signals → choose 8 Pin feedthrough
3. Number of Pins (Signal vs Power)

Use Case Recommendation
Complex signal routing 8 Pin
High power transmission 4 Pin
4. Flange Type (Compatibility)

Most systems use CF flanges (CF2.75 , CF35)

If users search:
“CF2.75 vacuum feedthrough connector”
→ ensure exact flange match

5. Conductor Material Selection

Material When to Use
Copper High conductivity / power systems
Molybdenum High temperature / harsh environments
6. Vacuum Level (HV / UHV)

HV → standard sealing
UHV → requires ceramic-to-metal brazing
Common Mistakes When Selecting Feedthroughs

Ignoring current rating (overheating risk)
Choosing wrong flange size
Not considering temperature limits
Using signal feedthrough for power applications
Recommended Products

For High Voltage & Multi-Pin Applications

8 Pin 12kV Ceramic Feedthrough

Ideal for semiconductor & UHV systems
Supports 12kV / 28A
For High Current Power Systems

4 Pin 10kV 30A High Current Feedthrough

Optimized for power delivery
Up to 30A per conductor
For High Current & Multi-Pin Applications

8 Pin 30A 10kV Ceramic Feedthrough

Ideal for UHV systems
Up to 30A per conductor