Alumina Ceramic Feedthrough Insulator
This is a hermetically sealed 99.5% alumina ceramic feedthrough insulator designed for high-vacuum systems. It allows conductors to pass through a barrier while maintaining electrical insulation, making it essential for RF and microwave applications. As a ceramic electrical insulator, it falls under tariff item 8546.20.00.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the insulator is made of materials other than ceramics, such as glass or plastics.
Tariff item 8546.90.00 covers electrical insulators of materials other than ceramics.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the product is clearly described as a ceramic electrical insulator on customs documentation to avoid misclassification
• Verify the alumina content (99.5%) and provide technical datasheets if requested by CBSA
• Consider the end-use application (e.g
• vacuum systems) to confirm it is not part of a larger machine
Related Products under Tariff item 8546.20.00
69kV Suspension Disc Insulators
This is a porcelain disc suspension insulator rated at 69kV, used in strings for overhead transmission towers. Each cap-and-pin unit provides high mechanical strength and contamination resistance. As a ceramic electrical insulator, it falls under tariff item 8546.20.00.
Alumina Ceramic Spool Insulator
This is a precision-machined spool-shaped insulator made from 95% alumina ceramic, used in electrical coils and transformers for wire support. It provides electrical insulation and prevents short circuits. As a ceramic electrical insulator, it is classified under tariff item 8546.20.00.
Beryllia Ceramic RF Insulator
This is a beryllium oxide (BeO) ceramic insulator for RF power transistors, offering high thermal conductivity while providing electrical insulation. It is a specialized ceramic insulator used in high-frequency applications. As a ceramic electrical insulator, it falls under tariff item 8546.20.00.
Ceramic Pothead Insulator
This is a large porcelain pothead insulator used for cable termination in substations (69-230kV). It provides stress relief and insulation for high-voltage cables. As a ceramic electrical insulator, it is classified under tariff item 8546.20.00.
Cordierite Ceramic Bobbin Insulator
This is a cordierite ceramic bobbin for winding magnet wire in inductors and relays, providing interlayer insulation. It has low thermal expansion properties, making it suitable for various electrical applications. As a ceramic electrical insulator, it falls under tariff item 8546.20.00.
High-Purity Alumina Submount Insulator
This is a 99.9% alumina ceramic submount for power semiconductor modules, providing thermal and electrical isolation. It is used in IGBT modules to support and insulate semiconductor components. As a ceramic electrical insulator, it is classified under tariff item 8546.20.00.