Sourcing VFD tubes from China

0% duty on vacuum fluorescent display tubes

Read from the UK Trade Tariff on 2 October 2026, heading 8540 covers thermionic, cold cathode and photocathode valves and tubes. The specific display-tube description under 8540 89 00 91 includes a glass housing mounted on a board no larger than 300 mm × 350 mm, excluding leads, with fluorescent or phosphorescent character elements. Match the complete description to the actual tube.

The supplied tariff record shows 0% duty for goods from China on the relevant display-tube and parts lines. It lists no anti-dumping or countervailing duty, suspensions or attached import controls. The table separates segmented and character-row formats within the same specific line; these are not separate commodity codes.

Give your broker the tube drawing, dimensions, construction and details of any attached electronics to confirm the commodity code. The residual tube and parts entries are conditional classification options. For other products in this heading, see vacuum tubes and magnetrons.

Specify the character pattern and drive conditions

Specify the character and symbol layout, viewing area, glass dimensions, pin pitch, pin assignment and mounting arrangement. Agree filament, grid and anode drive conditions, multiplex operation, brightness, colour and the test circuit. Approve a sample operating with your intended driver rather than accepting a photograph of an illuminated tube.

For Great Britain, official guidance excludes component parts sold business to business from RoHS scope. If incorporated into a final assembly placed on the market, the assembly, including its components, must comply. Ask for material declarations and supporting evidence for the exact tube, including any claimed exemption, to support the finished product assessment.

Worked duty example

Illustrative example, not a quote: Illustrative order: 5,000 vacuum fluorescent display tubes under 8540 89 00 91, invoiced at £30,000 free on board, with £900 of freight and insurance to the UK. The customs value is £30,900. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £30,900, so it is £6,180. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.

Inspection checklist

Identity: compare markings, character layout, dimensions and pin assignment with the approved drawing and sample.

Illumination: run the agreed character patterns at the specified drive conditions; check missing segments, uneven brightness, unwanted glow and colour variation.

Glass and pins: inspect seals and glass for cracks, check bent leads and test filament continuity before powering samples.

Packing: check that individual supports protect the glass and leads, prevent movement and keep tubes from touching.

What goes wrong

A tube can fit mechanically but use a different pin assignment or drive arrangement. Incorrect filament or multiplex settings can produce dim characters, uneven illumination or unwanted glow. Compare samples under the same circuit and viewing conditions before accepting a substitute.

Glass damage, bent leads and inconsistent brightness can make a batch unusable even when cartons look intact. Agree the functional test and packing method before production, and record defects by batch. Use the quality inspection guide to prepare the inspection brief.

Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For components and parts, see sourcing for manufacturers.