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HTS Code · Heading 8540 · Electrical Machinery and Equipment

8540.99.40.00

Electron guns; radio frequency (RF) interaction structures for microwave tubes of subheadings 8540.71 through 8540.79, inclusive

Estimated Total Duty

35% from China

Free MFN base + 25% 301 + 10% S122. Stacked per the centralized 2026 program snapshot.

Tariff Details
HS Code
8540.99.40.00
Description
Electron guns; radio frequency (RF) interaction structures for microwave tubes of subheadings 8540.71 through 8540.79, inclusive
General Duty Rate
Free
Unit of Quantity
No.
Chapter
Chapter 85 — Electrical Machinery and Equipment
Section
Section 16
Last Updated
April 9, 2026
Tariff by Country of Origin
OriginMFN BaseStacked ProgramsEst. Total
ChinaFree
301 +25%S122 +10%
35%
Mexico (USMCA)FreeNone0%
Canada (USMCA)FreeNone0%
VietnamFree
S122 +10%
10%
Germany (EU)Free
S122 +10%
10%
IndiaFree
S122 +10%
10%
South KoreaFree
S122 +10%
10%
Totals are estimates. USMCA origins assume the good qualifies under rule-of-origin. Final landed cost depends on MPF, HMF, and any exclusions \u2014 run the full calculator.
All Additional Tariff Rates on This Code
Section 301 (China)
+25%
Section 122 Surcharge
+10%
Calculate landed cost
Full per-shipment total incl. MPF/HMF
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IEEPA duties paid pre-SCOTUS may be refundable
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Read the full guide

Electronics Import Tariffs & HS Codes — 2026

Section 301 lists 1–4 and reciprocal surcharges on the major electronics headings.

Frequently Asked Questions

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