Klystron Power Amplifier Tube from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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