Sourcing voltage regulator ICs from China

UK duty on voltage regulator ICs

Heading 8542 covers electronic integrated circuits. This guide concerns voltage regulator chips, including linear and switching regulators. The table shows potentially relevant other-integrated-circuit categories and a parts category; these are alternatives for classification, not interchangeable codes. Assembled regulator boards need a separate classification check.

Read from the UK Trade Tariff on 30 September 2026, all lines in the supplied heading record carried 0% duty for goods from China. No anti-dumping or countervailing duties, suspensions or attached import controls were listed. Import VAT is separate from duty; see import duty and VAT.

Confirm the commodity code using the datasheet, device function and construction before shipping. Do not select an amplifier code simply because the regulator contains an internal amplifier. For wider heading context, see operational amplifier ICs.

Specify the regulator and its operating circuit

State the manufacturer, complete part number, package, pin arrangement and temperature grade. Specify fixed or adjustable output, input range, output tolerance, load current, dropout voltage for linear regulators, quiescent current and protection behaviour. For switching regulators, settle topology, switching behaviour and required external components.

Agree sample tests in the intended circuit, including output capacitor selection, start-up, load changes, ripple and thermal behaviour. Require approval before any substitution. Obtain part-specific hazardous-substance information: business-to-business components are outside RoHS scope, but a finished assembly within scope must comply, including its components.

Worked duty example

Illustrative example, not a quote: Illustrative order: 50,000 voltage regulator chips on reels under 8542 39 90 00, invoiced at £40,000 free on board, with £600 of freight and insurance to the UK. The customs value is £40,600. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £40,600, so it is £8,120. 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 chip markings, package, pin arrangement and reel labels to the approved part number and sample.

Traceability: check manufacturer records, supplier invoices, batch identifiers and date codes; investigate mixed lots or altered markings.

Electrical performance: test output accuracy, dropout where relevant, quiescent current, ripple and load response against the agreed datasheet and circuit.

Packing: inspect moisture-barrier seals, humidity indicators and lead condition; retain samples and batch test records. Arrange quality inspection before release.

What goes wrong

A substitute can share the package and nominal output while differing in pin arrangement, capacitor requirements or thermal performance. A regulator that works without load may become unstable or overheat in the intended circuit. Approve the actual part and test configuration before accepting production stock.

Remarked or recovered chips, mixed batches and poor moisture handling can undermine otherwise satisfactory sample results. Check each supplied lot against the approved evidence, investigate discrepancies and keep affected stock separate until the supplier resolves them.

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.