Silicon Intensifier Target Camera Tube from Japan
SIT tubes use silicon targets with electron beam intensification for extremely low-light television camera applications like astronomy. Classified in HTS 8540.20.20.80 as other cathode-ray television camera tubes with photocathode elements.
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
• Astronomical end-use letters prevent industrial reclassification under machine vision codes
• Quantum efficiency specs mandatory to distinguish from display CRT phosphor tubes
• Cleanroom packaging required; contamination voids photocathode warranty and classification