Mercury Arc Rectifier Tube
Gas-filled tube using mercury vapor arc for high-voltage DC power conversion in industrial applications. HTS 8540.89.00.80 includes mercury arc rectifying tubes as specified in heading description.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If thyristor/rectifier modules
Modern solid-state replacements classify under static converters.
If semiconductor diodes
Diodes and rectifier assemblies without gas/vacuum elements go to 8541.
If apparatus for electrical circuits
Complete rectifier units with cooling/heatsinks classify under heading 8536.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Hazardous material declaration mandatory due to mercury content; follow EPA/DOT regulations
• Prove vapor construction vs solid-state rectifiers (8541.10) with cutaway diagrams
Related Products under HTS 8540.89.00.80
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Vacuum Photomultiplier Tube PMT
A vacuum tube containing a photocathode that emits electrons when struck by photons, which are then multiplied to produce a measurable current. Classified under HTS 8540.89.00.80 as a photocathode tube not specifically covered by other subheadings in heading 8540. Used in scientific instruments like scintillation detectors.