Mercury Arc Rectifier Gas Tube
A mercury arc rectifier tube converts AC to DC using ionized mercury vapor in a vacuum envelope, historically used in industrial power supplies. Though largely obsolete, it remains classified as a gas-filled electron tube under this tariff item.
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 |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as part of a power conversion system
Power conversion equipment may be classified under heading 85.04.
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
• Classify the tube as a vapor-filled electron tube
• Ensure mercury content complies with Canadian environmental regulations
• Provide historical or technical documentation to support classification
Related Products under Tariff item 8540.89.00
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