Sourcing NOR flash memory chips from China

Zero duty on NOR flash memory chips

Heading 8542 covers electronic integrated circuits. Ordinary NOR flash chips fall within the flash memory descriptions: 8542 32 61 00 for capacity not exceeding 512 Mbits and 8542 32 69 00 for higher capacity. The chapter-note memory lines in the table are conditional alternatives for qualifying constructions, rather than interchangeable codes for ordinary flash chips.

Read from the UK Trade Tariff on 30 September 2026, all the selected lines carried 0% duty for goods from China. The supplied tariff record lists no anti-dumping or countervailing duty, suspensions or attached import controls for these lines. Zero customs duty does not remove import VAT.

Confirm the commodity code using the manufacturer's datasheet, capacity and construction. For the wider memory family within this heading, see EEPROM memory integrated circuits.

Specify the interface and firmware behaviour

State the manufacturer and full ordering part number, memory capacity, serial or parallel interface, supply voltage, package, pin arrangement and temperature grade. Specify erase organisation, read timing, write protection and the required endurance and data retention from the datasheet. Agree whether stock must be new and unused, and whether substitutions need your written approval.

Test proposed alternatives with your bootloader and programmer. Check device identification, supported commands, addressing, erase operations and protection settings. Matching capacity and package does not establish firmware compatibility.

For finished equipment, obtain part-specific substance declarations and supporting material evidence. The manufacturer remains responsible for assessing whether its product complies with the restrictions on hazardous substances; a supplier declaration does not replace that assessment. Agree the evidence needed through testing and certification.

Worked duty example

Illustrative example, not a quote: Illustrative order: 50,000 NOR flash memory chips on reels under 8542 32 61 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 package markings, ordering suffix, reel labels, date codes and lot numbers to the purchase order and traceability records.

Electrical behaviour: read device identification, programme and verify test data, erase and read back, and check protection behaviour against the datasheet and your board.

Condition: inspect leads, package surfaces and marking consistency for damage or signs of rework; investigate suspect stock with electrical testing and X-ray comparison.

Packing: check moisture barrier seals, desiccant and humidity indicators where specified by the maker, and maintain protection against electrostatic discharge. Retain samples and lot records.

What goes wrong

A replacement can fit the footprint yet fail to boot because its commands, addressing or protection defaults differ. A chip that passes a simple read test may fail during erase or programming. Approve samples in the intended board before releasing a production order.

Broker stock can contain remarked grades, recovered chips or mixed lots. Damaged moisture packaging can create assembly failures, while missing lot records make fault investigation difficult. Keep suspect reels separate and settle the inspection scope before payment; see quality inspection explained.

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.