Sourcing carbon composition resistors from China

UK duty on carbon composition resistors

Read from the UK Trade Tariff on 30 September 2026, heading 8533 covers electrical resistors, including rheostats and potentiometers, but excludes heating resistors. Complete fixed carbon composition resistors fall within 8533 10 00 00, alongside carbon film resistors. The other table rows are neighbouring categories for comparison, rather than additional carbon composition classifications.

The supplied tariff snapshot records 0% duty for goods from China on every line in this heading. It lists no anti-dumping or countervailing duties, suspensions or attached import controls. Import VAT is separate from customs duty.

Confirm construction and whether the shipment contains complete resistors or parts before choosing the commodity code. For comparison with another fixed-resistor technology and the wider heading, see the metal film resistors guide.

Specify composition construction and stability

Write carbon composition explicitly in the purchase specification. Ask for the manufacturer's construction description, full part number, resistance value, tolerance, power rating, maximum working voltage and temperature coefficient. Include body dimensions, lead diameter, lead length and packing format. Do not accept a carbon film substitute simply because its resistance value matches.

For pulse applications, request the supplier's pulse-loading data and agree the test conditions with your circuit designer. For repair stock, check the replacement against the original circuit requirements. Agree resistance measurements before and after the intended soldering and conditioning checks, with acceptance limits taken from the approved datasheet.

Official guidance says component parts sold between businesses are outside the scope of the hazardous-substance regulations. Confirm with the relevant authority how the requirements apply to components incorporated into finished electrical products. Request part-specific material declarations and supporting data for the body, coating and lead finish.

Worked duty example

Illustrative example, not a quote: 10,000 carbon composition resistors, illustrative order under 8533 10 00 00, invoiced at £9,000 free on board, with £300 of freight and insurance to the UK. The customs value is £9,300. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £9,300, so it is £1,860. 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: match the manufacturer's part number, construction description, batch labels and resistance markings to the approved order.

Resistance: measure samples from each batch against the ordered tolerance, then compare results after the agreed soldering and conditioning checks.

Body and leads: check dimensions, cracked coatings, bent leads, corrosion and solderability against the approved sample and datasheet.

Records and packing: match material declarations to the supplied part numbers, retain batch traceability and check for damp or damaged packaging. Plan the checks with the quality inspection guide.

What goes wrong

A matching resistance value can hide a construction substitution. Other failures include resistance drift, damaged coatings and oxidised leads that solder poorly. An initial resistance measurement alone does not establish that a batch will meet the agreed requirements after assembly.

Keep an approved sample and require approval before changes to construction, lead finish or packing. Buy through the manufacturer or an authorised distributor, retain batch records and compare arrival samples with the approved specification.

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.