Trigger Tube for Strobe Systems

Gas-filled trigger tubes initiate high-voltage discharge in strobe/flash systems through controlled gas ionization. Classified under HTS 8540.89.00 as other gas-filled tubes designed for switching high-power lighting circuits.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China3.7%+35.0%38.7%
🇲🇽Mexico3.7%+10.0%13.7%
🇨🇦Canada3.7%+10.0%13.7%
🇩🇪Germany3.7%+10.0%13.7%
🇯🇵Japan3.7%+10.0%13.7%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

8539.49.00Lower: 37.4% vs 38.7%

If discharge lamp parts

Xenon strobe system components under electric discharge lamp parts.

8513.90Lower: 13.5% vs 38.7%

If portable lamp assemblies

Complete photographic flash units classify tubes differently.

8536.50.90Lower: 35% vs 38.7%

If semiconductor switches

Solid-state trigger circuits classified as semiconductor devices.

Not sure which classification is right?

Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.

Import Tips & Compliance

Voltage triggering threshold and gas mixture specifications required

High-voltage insulation testing documentation recommended

Distinguish from spark gaps under 8538.90 (other electrical apparatus)

Related Products under HTS 8540.89.00

Magnetron Injection-Locked Tube

Phase-locked magnetron tubes for coherent microwave power combining in radar systems. Classified under HTS 8540.89.00 as specialized thermionic tubes with injection locking circuitry for phase control.

Klystron Power Amplifier Tube

Klystron tubes are specialized linear beam vacuum tubes used for amplification of microwave signals in high-power applications like radio transmitters and particle accelerators. Classified under HTS 8540.89.00 as other thermionic tubes due to their electron beam focusing mechanism in vacuum environment.

Xenon Flashtube Trigger Tube

High-voltage gas tubes triggering xenon flashtubes in high-intensity strobe lighting. HTS 8540.89.00 covers these as other gas-filled tubes initiating capacitive discharge through gas ionization.

Thyratron Gas-Filled Switching Tube

Thyratrons are gas-filled tubes containing low-pressure inert gas used for high-power switching and rectification in industrial applications. They qualify under HTS 8540.89.00 as other gas-filled tubes functioning through gas ionization triggered by cathode emission.

Ignitron Mercury Arc Rectifier Tube

Ignitrons are large mercury arc rectifier tubes used for high-current DC power conversion in industrial applications like aluminum smelting. HTS 8540.89.00 includes these mercury vapor-filled tubes operating via cathode-initiated arc discharge.

Photomultiplier Tube (PMT)

Photomultiplier tubes convert weak light signals into electrical pulses through electron multiplication across multiple dynodes. Classified under HTS 8540.89.00 as photocathode tubes designed for photon detection in scientific instruments.