Hydrogen Thyratron Switching Tube
Gas-filled switching tube using hydrogen for fast high-power pulse generation in radar and pulsed power systems. Covered by HTS 8540.89.00.80 as other gas-filled tubes.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If automatic circuit breakers
Switching tubes in protective circuits may classify under Chapter 85 heading 8535.
If insulating fittings
High-voltage insulators with integral switching elements shift classification.
If lead-acid battery chargers
Pulse chargers containing thyratrons classify as complete charging systems.
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Import Tips & Compliance
• High-voltage safety data sheets required; specify peak voltage/current ratings
• Defense applications need munitions list review for ITAR classification
• Avoid reclassification as ignitron (8540.71) by documenting hydrogen fill
Related Products under HTS 8540.89.00.80
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Geiger-Muller Counter Tube
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Xenon Flashtube Trigger Tube
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Spark Gap Protective Tube
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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.
Magnetron Vacuum Tube for Microwave
A vacuum tube that generates microwave signals through velocity modulation of electrons in a magnetic field, used in radar and microwave ovens. Falls under HTS 8540.89.00.80 as an other vacuum tube not specified elsewhere in 8540. Essential component for high-power RF generation.