HS Code for Vacuum tube

Vacuum tubes, also known as thermionic valves, are classified under HS code 8540.81. This classification is based on the product's nature as a thermionic, cold cathode, or photo-cathode valve or tube. Heading 8540 specifically encompasses electronic components that control the flow of electrons through a vacuum or gas-filled envelope. Subheading 8540.81 is designated for receiver or amplifier valves and tubes, which are used to modulate, amplify, or rectify electrical signals. The classification is determined by the physical construction of the device, which typically includes an anode, a cathode, and often one or more grids housed within a glass or ceramic vacuum-sealed container. Despite the prevalence of solid-state electronics, these components remain distinct in the Harmonized System because their operation relies on thermionic emission or gas ionization rather than the properties of semiconductor materials. This code is applied to tubes used in high-end audio equipment, radio transmitters, and specialized industrial machinery.

Products Included

• Triode, tetrode, and pentode amplifier tubes
• Vacuum-based rectifier tubes
• Receiver tubes for radio and television
• Preamplifier vacuum tubes
• Glass-envelope thermionic valves
• Ceramic-envelope power tubes

Common Misclassification

Vacuum tubes are often misclassified under HS code 8541, which covers diodes, transistors, and similar semiconductor devices. While both perform similar electronic functions, 8541 is strictly for solid-state components. Another common error is classifying them under HS code 8539 as electric filament lamps due to their similar glass appearance; however, 8539 is for lighting, whereas 8540 is for electronic valve functions. Cathode ray tubes (CRTs) are also distinct and fall under 8540.11 through 8540.60.

FAQ

What is the HS code for Vacuum tube?

The HS code for receiver or amplifier vacuum tubes is 8540.81.

Are magnetrons classified under this same code?

No, magnetrons and klystrons are classified under different subheadings within 8540, specifically 8540.71 or 8540.72, depending on their technical specifications.