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8540.89.00.20/Mercury Arc Rectifier Gas Tube/Canada

Mercury Arc Rectifier Gas Tube from Canada

Mercury arc rectifier tubes convert AC to DC using ionized mercury vapor in a vacuum envelope, historically used in industrial power supplies. Though largely obsolete, they remain classified as gas-filled electron tubes under HTS 8540.89.0020.

Duty Rate — Canada → United States

13.7%

Rate breakdown

9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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Import Tips

• Declare mercury content accurately due to hazardous material shipping requirements

• Provide proof of intended industrial/legacy use vs. modern semiconductor replacement

• EPA import notifications required for mercury-containing tubes

Mercury Arc Rectifier Gas Tube from Canada — Import Duty Rate | HTS 8540.89.00.20