8540.89.00/Grid-Controlled Vacuum Tube/Japan

Grid-Controlled Vacuum Tube from Japan

Triode vacuum tubes with control grid for amplification in audio and RF applications. HTS 8540.89.00 covers these thermionic tubes where grid modulates electron flow from cathode to anode.

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%

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Import Tips

• Gain factor, plate voltage ratings, and filament current specs essential

• NOS (New Old Stock) certification for vintage tubes affects valuation

• Confirm vacuum tube vs. transistor under 8541 for audio amplifiers