HTS 8540 Thermionic, 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
Base rates and the additional US duties for imports from the main origins on entry date 2026-10-09, from the HTS Calculator duty engine.
Base rate (column 1 general)
Free to 15%
Additional duty, main origins
0–37.5%
Statistical lines
38
Entry date shown
2026-10-09 (dataset 1.0.0)
Additional duties for the main origins
Additional duties on 2026-10-09
Origin
Additional duty
Measures
China
37.5%
Section 301
Mexico
0–10%
Section 301
Canada
0–10%
Section 301
Vietnam
12.5%
Section 301
Germany
0–10%
Section 301
Range of the Chapter 99 duties (percent of customs value) across the lines of this heading. A range means the result differs between lines or depends on facts about the goods; an asterisk marks lines whose duty also depends on a specific (per unit) base rate. Other origins (Japan, South Korea, Taiwan, India, United Kingdom and any other country): in the calculator and the API.
Chapter 99 headings on these lines
9903.05.29 Section 301
9903.05.31 Section 301
9903.05.38 Section 301
9903.05.39 Section 301
9903.05.55 Section 301
9903.05.84 Section 301
9903.05.93 Section 301
9903.05.94 Section 301
9903.88.01 Section 301
9903.88.03 Section 301
Every line, every origin, with citations
This page sums heading 8540 up. The duty for one line, origin and date comes from the duty engine:
Base rate plus each Chapter 99 line, in percent and in dollars
Citations to the Federal Register, CBP and the USITC, with the quoted text
The lines considered and not applied, and why
Any origin, any entry date from 2025-01-01 to 2026-10-09
Between 2025-10-09 and 2026-10-09: the Chapter 99 headings applied changed for all 5 main origins. Dated changes, with their sources: the change list and the Tariff Change Feed.
Scope
We do not classify goods. These pages show reference rates for HTS codes. Choosing the code for an entry is the importer's responsibility, and entries are filed by the importer of record or a licensed customs broker. Duties shown are calculations from public sources, not legal advice.