Thyratron Gas-Filled Switching Tube from Germany
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 — Germany → United States
10%
Rate breakdown
9903.05.3910%Section 301 (forced labor) — European Union member state (col1 rate < 10 percent): MFN < 10% → total duty capped at 10%
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