Klystron Gas-Loaded Reflex Tube from Japan
Gas-loaded klystron tubes use controlled gas pressure for microwave power generation in scientific accelerators. The gas affects electron velocity, qualifying as vapor electron tubes under HTS 8540.89.0020.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Vacuum pumpdown specs must show residual operating gas pressure
• Particle accelerator end-use statement may trigger EAR licensing
• RF power output rating critical for classification