HS 8540 — Thermionic, cold cathode or photo-cathode valves and tubes (e.g. vacuum, vapour, gas filled valves and tubes, mercury arc rectifying valves and tubes, cathode-ray and television camera tubes)
Harmonized System heading · Chapter 85 Electrical machinery and equipment
HS Code
4-digit heading
Chapter 85
Chapter 85 Electrical machinery and equipment
Typical duty
By subheading & market
What HS 8540 covers
Electric motors, batteries, phones, TVs, semiconductors, sound/recording equipment.
Classification notes
Function (power vs communication vs component) determines the heading; electronics need HS precision.
Back to Chapter 85
Frequently asked questions about HS 8540
What is HS 8540?
Thermionic, cold cathode or photo-cathode valves and tubes (e.g. vacuum, vapour, gas filled valves and tubes, mercury arc rectifying valves and tubes, cathode-ray and television camera tubes) is a 4-digit Harmonized System (HS) heading under Chapter 85 (Electrical machinery and equipment). It groups goods before national 6-digit subheadings.
Which products are classified under HS 8540?
Thermionic, cold cathode or photo-cathode valves and tubes (e.g. vacuum, vapour, gas filled valves and tubes, mercury arc rectifying valves and tubes, cathode-ray and television camera tubes) covers the products described by this heading. To classify a specific good, determine the precise 6-digit HS subheading, since rates and rules apply at the subheading level.
How do I find the import duty for HS 8540 goods?
Identify the 6-digit subheading for your product, then check the MFN rate and any preferential rate for your destination market (e.g. China, the United States, the EU). 169e’s country tariff pages list rates per HS chapter.
What should I watch for when classifying HS 8540 products?
Function (power vs communication vs component) determines the heading; electronics need HS precision.