Heading 8540 · Thermionic, cold cathode or photocathode tubes (for example, vacuum or vapor or…

8540.79

Thermionic, cold cathode or photocathode tubes (for… — Other:

Calculate duties for this code

Mentioned in Chapter 99

The parts of Chapter 99, in the 2026 HTS Revision 22, that list HTS 8540.79, a broader code that includes it, or a narrower code within it.

U.S. noteExcerptHeadings that refer to it
U.S. note 20(b)(b) Heading 9903.88.01 applies to all products of China that are classified in the following 8-digit subheadings, except products of China granted an exclusion by the U.S. Trade Representative and provided for in: (1) heading 9903.88.05…9903.88.01

Being listed is not owing a duty. A note may list goods that a measure leaves out; whether a heading applies depends on the origin, the date and the product; and the measures on all the goods of a country list no code at all. The calculator says what applies.

In the tariff

  1. 8540Thermionic, cold cathode or photocathode tubes (for example, vacuum or vapor or gas filled tubes, mercury arc rectifying tubes, cathode-ray tubes, television camera tubes); parts thereof
  2. Microwave tubes (for example, magnetrons, klystrons, traveling wave tubes, carcinotrons), excluding grid-controlled tubes
  3. 8540.79Other
  4. 8540.79.10.00Klystrons3.3%
  5. 8540.79.20.00Other3.7%