HS Code Subheading

Tubes; microwave (for example klystrons, travelling wave tubes, carlinotrons), excluding magnetrons and grid-controlled tubes

8540.79 Subheading
Section XVI — Machinery and mechanical appliances; electrical equipment; parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles

About HS Code 854079

This category covers a range of specialized microwave tubes, such as klystrons, travelling wave tubes (TWTs), and carlinotrons, excluding magnetrons and grid-controlled tubes. These devices are essential for generating, amplifying, or modifying high-frequency electromagnetic waves, finding critical applications in satellite communications, radar systems, particle accelerators, and high-power scientific research. The international trade involves high-value, low-volume components. Importers are typically telecommunications companies, aerospace and defense contractors, research institutions, and manufacturers of advanced scientific instruments. Exporters are countries with highly sophisticated electronics and vacuum tube manufacturing capabilities. Key aspects of this trade include extreme precision, high reliability, specific frequency and power requirements, and often export controls due to their strategic importance. The market is highly specialized and driven by technological advancements in communication and defense.

Products Under This Code

Klystrons, Travelling wave tubes (TWTs), Backward wave oscillators (BWOs), Gyrotrons, Inductive output tubes (IOTs), Extended interaction klystrons, Helix TWTs, Coupled-cavity TWTs

Real World Examples

L3Harris TWT (satellite communication), CPI Klystron (particle accelerator), Thales TWT (radar system), Varian Klystron (medical linear accelerator), Teledyne TWT (electronic warfare)

Common Misclassification

This code is distinct from 854071 (magnetrons) and 854081 (receiver/amplifier valves), as it covers other specific types of microwave tubes. It should also not be confused with complete satellite communication equipment (851762) or radar apparatus (852610).

Products Classified Under 8540.79

Klystron tubeTraveling wave tube

Related Codes

8540.11 Tubes; cathode-ray television picture tubes, including video monitor cathode-ray tubes, colour 8540.12 Tubes; cathode-ray television picture tubes, including video monitor cathode-ray tubes, monochrome 8540.20 Tubes; television camera tubes, image converters and intensifiers, other photo-cathode tubes 8540.40 Tubes; data/graphic display tubes, monochrome; data/graphic display tubes, colour, with a phosphor dot screen pitch smaller than 0.4mm 8540.60 Tubes; cathode ray, n.e.c. in heading no. 8540 8540.71 Tubes; microwave, magnetrons, excluding grid-controlled tubes 8540.81 Valves and tubes; receiver or amplifier 8540.89 Valves and tubes; n.e.c. in heading no. 8540 8540.91 Tubes; parts of cathode-ray tubes 8540.99 Valves and tubes; parts of the valves and tubes of heading no. 8540, excluding parts of cathode-ray tubes

Industry

This code belongs to the Electronics & Electrical Equipment industry.

Trade Overview

The USA, Japan, France, and Germany are leading countries in the development and trade of these advanced microwave tubes, reflecting their strong aerospace, defense, and scientific research sectors.

Frequently Asked Questions

What is HS code 854079?

HS code 854079 covers: Tubes; microwave (for example klystrons, travelling wave tubes, carlinotrons), excluding magnetrons and grid-controlled tubes. This category covers a range of specialized microwave tubes, such as klystrons, travelling wave tubes (TWTs), and carlinotrons, excluding magnetrons and grid-controlled tubes. These devices are essential for generating, amplifying, or modifying high-frequency electromagnetic waves, finding critical applications in satellite communications, radar systems, particle accelerators, and high-power scientific research. The international trade involves high-value, low-volume components. Importers are typically telecommunications companies, aerospace and defense contractors, research institutions, and manufacturers of advanced scientific instruments. Exporters are countries with highly sophisticated electronics and vacuum tube manufacturing capabilities. Key aspects of this trade include extreme precision, high reliability, specific frequency and power requirements, and often export controls due to their strategic importance. The market is highly specialized and driven by technological advancements in communication and defense.

What products fall under HS code 854079?

Klystrons, Travelling wave tubes (TWTs), Backward wave oscillators (BWOs), Gyrotrons, Inductive output tubes (IOTs), Extended interaction klystrons, Helix TWTs, Coupled-cavity TWTs

What are common misclassifications for HS code 854079?

This code is distinct from 854071 (magnetrons) and 854081 (receiver/amplifier valves), as it covers other specific types of microwave tubes. It should also not be confused with complete satellite communication equipment (851762) or radar apparatus (852610).

How is HS code 854079 structured?

HS code 854079 is a 6-digit subheading under the Harmonized System. The first 2 digits (85) identify the chapter, digits 3-4 (40) identify the heading, and digits 5-6 (79) specify the subheading. This code is standardized globally by the World Customs Organization.