Thyratron Gas-Filled Switching Tube from Mexico
Thyratrons are gas-filled tubes containing low-pressure inert gas used for high-power switching and rectification in industrial applications. They qualify under HTS 8540.89.00 as other gas-filled tubes functioning through gas ionization triggered by cathode emission.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Specify gas type (hydrogen/argon) and pressure ratings in technical documentation
• Hazardous material declarations required for gas-filled tubes during transport
• Distinguish from semiconductor thyristors under 8541; confirm gas discharge mechanism