Trigger Tube for Strobe Systems from Canada
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.
Duty Rate — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Voltage triggering threshold and gas mixture specifications required
• High-voltage insulation testing documentation recommended
• Distinguish from spark gaps under 8538.90 (other electrical apparatus)