Klystron Power Amplifier Tube from China
Klystron tubes are specialized linear beam vacuum tubes used for amplification of microwave signals in high-power applications like radio transmitters and particle accelerators. Classified under HTS 8540.89.00 as other thermionic tubes due to their electron beam focusing mechanism in vacuum environment.
Duty Rate — China → United States
41.2%
Rate breakdown
9903.88.0125%Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Include frequency range and power output specs in commercial invoice for proper duty assessment
• Export control documentation often required for high-power klystrons due to dual-use technology
• Avoid misclassification as broadcast equipment parts under 8525; these are standalone amplifier tubes