Germanium Point Contact Diode OA90 from Japan
The OA90 is a vintage germanium diode used in radio frequency detection and vintage electronics restoration. It offers low forward voltage for crystal radio detectors, classified under HTS 8541.10.00 for non-photosensitive diodes regardless of semiconductor material.
Duty Rate — Japan → United States
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Specify germanium material and detector function to distinguish from silicon types for proper valuation
• Import in small quantities to avoid anti-dumping scrutiny on legacy components
• Include test data showing low leakage current typical of point-contact construction