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.
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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.
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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
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