Hydrogen Thyratron Pulse Modulator Tube from Germany
Hydrogen thyratrons are specialized gas electron tubes designed for radar pulse modulators and high-voltage switching in scientific instruments. The low-pressure hydrogen gas enables fast switching, qualifying as a vapor electron tube under HTS 8540.89.0020.
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
• Include operating voltage/current ratings in import docs to distinguish from lower-power tubes
• Ensure supplier provides gas fill type certification to prevent reclassification
• Watch for antidumping duties if sourced from specific Asian manufacturers