Microwave Tunnel Diode from China
Esaki tunnel diode for ultra-fast microwave detectors and oscillators in instrumentation. Falls under HTS 8541.10.00.60 due to quantum tunneling negative resistance at Ka-band frequencies. Legacy but still used in high-frequency lab equipment.
Duty Rate — China → United States
50%
Rate breakdown
9903.91.0550%Effective with respect to entries on or after January 1, 2025, articles the product of China, as provided for in subdivision (f) of U.S. note 31 to this subchapter
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Quantum tunneling I-V curve data proves microwave negative resistance region
• Obsolete tech status may qualify for special import programs
• Lab calibration certificates enhance credibility for scientific imports