Ignitron Mercury Arc Rectifier Tube from Canada
Ignitrons are large mercury arc rectifier tubes used for high-current DC power conversion in industrial applications like aluminum smelting. HTS 8540.89.00 includes these mercury vapor-filled tubes operating via cathode-initiated arc discharge.
Duty Rate — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Mercury content declarations mandatory; special hazardous waste handling procedures
• Ozone-depleting substances certification required for mercury vapor tubes
• Legacy equipment replacement; verify if solid-state rectifiers under 8536 more appropriate