Harmonized Tariff Schedule of the U.S. › Chapter 85 Electrical machinery and equipment and parts thereof; sound and television recorders and reproducers
8540.79.10.00Tariff line
Classification path
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
8540
Microwave tubes (for example, magnetrons, klystrons, traveling wave tubes, carcinotrons), excluding grid-controlled tubes
Other
Klystrons
8540.79.10.00
Rates of duty
General rate (Column 1)3.3%
SpecialFree (A+, AU, BH, CL, CO, D, E, IL, JO, KR, MA, OM, P, PA, PE, S, SG)
Column 235%
UnitNo.
Free (A+, AU, BH, CL, CO, D, E, IL, JO, KR, MA, OM, P, PA, PE, S, SG)
Printed page 2939
Measure flags
for origin CN, entry date 2026-10-25 · base rate 3.3%
- Section 301 forced-labor tariff (12.5%)9903.05.31Applies+12.5%China: Column 1 rate + 12.5% additional
- China 301 List 1 (9903.88.01)9903.88.01Applies+25%8-digit subheading 8540.79.10 is on L1
Confirmed total 40.8% · max 40.8%Full duty breakdown →