HS Code for Klystron tube

Klystron tubes are classified under HS code 8540.79. This classification is found within Chapter 85, which encompasses electrical machinery and equipment and parts thereof. Heading 8540 specifically covers thermionic, cold cathode, or photo-cathode valves and tubes, including vacuum tubes. Subheading 8540.79 is a residual category for microwave tubes other than magnetrons and grid-controlled tubes. A klystron is a specialized linear-beam vacuum tube used as an amplifier or oscillator for radio frequencies, particularly in the microwave range. It operates by velocity-modulating an electron beam. Because it is a microwave tube but is distinct from magnetrons (8540.71), it falls into the "other" microwave tube category. These components are vital in high-power applications such as satellite communication ground stations, wideband high-power communication, and particle accelerators. The classification is based on the technical operation of the tube as a thermionic valve designed for microwave frequencies.

Products Included

• Reflex klystrons
• Multi-cavity klystrons
• Klystron amplifiers
• Traveling wave tubes (TWTs)
• Carcinotrons

Common Misclassification

Klystron tubes are often misclassified under 8540.71, which is specifically for magnetrons. While both are microwave tubes, their internal mechanisms differ significantly. They may also be confused with 8541.10 or 8541.21 if the user mistakes the vacuum tube for a solid-state semiconductor device like a diode or transistor.

FAQ

What is the HS code for Klystron tube?

The HS code for a klystron tube is 8540.79, under the category of other microwave tubes.

Is a klystron tube considered a semiconductor?

No, a klystron is a vacuum tube (thermionic valve) and is classified in 8540, whereas semiconductors are in 8541.