HTS Heading 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

All 38 HTS codes under heading 8540 (thermionic), with their duty rates from the 2026 HTS Revision 23. General duty Free to 15%.

Every line of heading 8540

  • 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.
  • 8540.11 Color (under: Cathode-ray television picture tubes, including video monitor cathode-ray tubes).
  • 8540.11.10 Non-high definition, non-projection, having a video display diagonal exceeding 35.56 cm: General 15%; Special Free (A+,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 60%.
  • 8540.11.10.30 Not exceeding 39 cm (under: Having a video display diagonal) (No.).
  • 8540.11.10.40 Exceeding 39 cm but not exceeding 45 cm (No.).
  • 8540.11.10.50 Exceeding 45 cm but not exceeding 50 cm (No.).
  • 8540.11.10.55 Exceeding 50 cm but not exceeding 63 cm (No.).
  • 8540.11.10.85 Exceeding 63 cm (under: Having a video display diagonal) (No.).
  • 8540.11.24.01 Having a video display diagonal not exceeding 34.29 cm (No.): General 7.5%; Special Free (A+,AU,B,BH,CL,CO,D,E,IL, JO,KR,MA, OM,P,PA,PE,S,SG); Column 2 60%.
  • 8540.11.28.01 Other (under: Non-high definition, non-projection, having a video display diagonal not exceeding 35.56 cm) (No.): General 15%; Special Free (A+,AU,B,BH,CL,CO,D,E,IL, JO,KR,MA, OM,P,PA,PE,S,SG); Column 2 60%.
  • 8540.11.30.00 High definition, having a video display diagonal exceeding 35.56 cm (No.): General 15%; Special Free (A+,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 60%.
  • 8540.11.44.01 Having a video display diagonal not exceeding 34.29 cm (No.): General 7.5%; Special Free (A+,AU,B,BH,CL,CO,D,E,IL, JO,KR,MA, OM,P,PA,PE,S,SG); Column 2 60%.
  • 8540.11.48.01 Other (under: High definition, having a video display diagonal not exceeding 35.56 cm) (No.): General 15%; Special Free (A+,AU,B,BH,CL,CO,D,E,IL, JO,KR,MA, OM,P,PA,PE,S,SG); Column 2 60%.
  • 8540.11.50.00 Other (under: Color) (No.): General 15%; Special Free (A+,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 60%.
  • 8540.12 Monochrome (under: Cathode-ray television picture tubes, including video monitor cathode-ray tubes).
  • 8540.12.10.00 Non-high definition (under: Television picture tubes having a straight line dimension across the faceplate greater than 29 cm but having no straight line dimension across the faceplate that exceeds 42 cm) (No.): General 3.6%; Special Free (A,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 60%.
  • 8540.12.20.00 High definition (under: Television picture tubes having a straight line dimension across the faceplate greater than 29 cm but having no straight line dimension across the faceplate that exceeds 42 cm) (No.): General 3.6%; Special Free (A,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 60%.
  • 8540.12.50 Non-high definition (under: Other): General 3.3%; Special Free (A+,AU,B,BH,CL,CO,D,E,IL, JO,KR,MA, OM,P,PA,PE,S,SG); Column 2 60%.
  • 8540.12.50.40 Projection (under: Non-high definition) (No.).
  • 8540.12.50.80 Other (under: Non-high definition) (No.).
  • 8540.12.70.00 High definition (under: Other) (No.): General 3.3%; Special Free (A+,AU,B,BH,CL,CO,D,E,IL, JO,KR,MA, OM,P,PA,PE,S,SG); Column 2 60%.
  • 8540.20 Television camera tubes; image converters and intensifiers; other photocathode tubes.
  • 8540.20.20 Cathode-ray tubes (under: Television camera tubes; image converters and intensifiers; other photocathode tubes): General 6%; Special Free (A+,AU,B,BH,CL,CO,D,E,IL, JO,KR,MA, OM,P,PA,PE,S,SG); Column 2 35%.
  • 8540.20.20.40 Color (under: Cathode-ray tubes) (No.).
  • 8540.20.20.80 Other (under: Cathode-ray tubes) (No.).
  • 8540.20.40.00 Other (under: Television camera tubes; image converters and intensifiers; other photocathode tubes) (No.): General 3.3%; Special Free (A+,AU,B,BH,CL,CO,D,E,IL, JO,KR,MA, OM,P,PA,PE,S,SG); Column 2 35%.
  • 8540.40.10 Data/graphic display tubes, monochrome; data/graphic display tubes, color, with a phosphor dot screen pitch smaller than 0.4 mm: General 3%; Special Free (A+,AU,B,BH,CL,CO,D,E,IL, JO,KR,MA, OM,P,PA,PE,S,SG); Column 2 35%.
  • 8540.40.10.10 Color (under: Data/graphic display tubes, monochrome; data/graphic display tubes, color, with a phosphor dot screen pitch smaller than 0.4 mm) (No.).
  • 8540.40.10.50 Other (under: Data/graphic display tubes, monochrome; data/graphic display tubes, color, with a phosphor dot screen pitch smaller than 0.4 mm) (No.).
  • 8540.60.00 Other cathode-ray tubes (under: 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): General 3%; Special Free (A+,AU,B,BH,CL,CO,D,E,IL, JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 35%.
  • 8540.60.00.20 Not exceeding 30 cm (under: Having a video display diagonal) (No.).
  • 8540.60.00.65 Exceeding 30 cm but not exceeding 36 cm (No.).
  • 8540.60.00.80 Exceeding 36 cm (under: Having a video display diagonal) (No.).
  • 8540.71 Magnetrons (under: Microwave tubes (for example, magnetrons, klystrons, traveling wave tubes, carcinotrons), excluding grid-controlled tubes).
  • 8540.71.20.00 Modified for use as parts of microwave ovens (No.): General Free; Special none; Column 2 35%.
  • 8540.71.40.00 Other (under: Magnetrons) (No.): General 3.7%; Special Free (A+,AU,BH,CL,CO,D,E,IL, JO,KR,MA, OM,P,PA,PE,S,SG); Column 2 35%.
  • 8540.79 Other (under: Microwave tubes (for example, magnetrons, klystrons, traveling wave tubes, carcinotrons), excluding grid-controlled tubes).
  • 8540.79.10.00 Klystrons (under: Other) (No.): General 3.3%; Special Free (A+,AU,BH,CL,CO,D,E,IL, JO,KR,MA, OM,P,PA,PE,S,SG); Column 2 35%.
  • 8540.79.20.00 Other (under: Other) (No.): General 3.7%; Special Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,MA, OM,P,PA,PE,S,SG); Column 2 35%.
  • 8540.81.00.00 Receiver or amplifier tubes (under: Other tubes) (No.): General 4.2%; Special Free (A+,AU,B,BH,CL,CO,D,E,IL, JO,KR,MA, OM,P,PA,PE,S,SG); Column 2 35%.
  • 8540.89.00 Other (under: Other tubes): General 3.7%; Special Free (A+,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 35%.
  • 8540.89.00.20 Gas and vapor electron tubes (under: Other) (No.).
  • 8540.89.00.40 Diodes, triodes and tetrodes (under: Other) (No.).
  • 8540.89.00.60 Light-sensing tubes (under: Other) (No.).
  • 8540.89.00.80 Other (under: Other) (No.).
  • 8540.91 Of cathode-ray tubes (under: Parts).
  • 8540.91.15.00 Front panel assemblies (under: Of cathode-ray tubes) (No.): General 5.4%; Special Free (A+,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 35%.
  • 8540.91.20.00 Deflection coils (under: Of cathode-ray tubes) (No.): General Free; Special none; Column 2 35%.
  • 8540.91.50.00 Other (under: Of cathode-ray tubes) (kg): General 5.4%; Special Free (A+,AU,B,BH,CL,CO,D,E,IL, JO,KR,MA, OM,P,PA,PE,S,SG); Column 2 35%.
  • 8540.99 Other (under: Parts).
  • 8540.99.40.00 Electron guns; radio frequency (RF) interaction structures for microwave tubes of subheadings 8540.71 through 8540.79, inclusive (No.): General Free; Special none; Column 2 35%.
  • 8540.99.80.00 Other (under: Other) (No.): General Free; Special none; Column 2 35%.

About these rates

The rates are those printed in the 2026 HTS Revision 23, published by the U.S. International Trade Commission. A 10-digit statistical line takes the rates printed on the 8-digit line above it. Chapter 99 duties (Section 232, Section 301, IEEPA) depend on the product, the origin and the date, are charged on top, and are not included. A code here is a strong lead, not a ruling: confirm it with a customs broker or a CBP binding ruling.

Last reviewed 2026-11-12.