The CB Scheme: How One Test Report Opens Multiple Markets

Certifying an LED driver for every market it might sell in, one country at a time, is expensive and slow. The CB scheme exists to avoid that repetition, and it is the framework that lets a manufacturer test once and convert the result into national certificates around the world.

CB stands for Certification Body, and the scheme is run under the IECEE, the IEC System of Conformity Assessment Schemes. A manufacturer sends a product to a national certification body that has been accepted into the scheme, such as TUV Rheinland, Intertek, or UL. That body tests the product against the relevant IEC standard and issues a CB test report and a CB certificate. Other national certification bodies around the world accept that report as the safety evidence for their own local approval, with only the national deviations retested.

The standards that matter for LED drivers are well established. IEC 61347-1 covers lamp control gear in general, and IEC 62384 covers DC or AC supplied electronic control gear for LED modules. EMC is tested to IEC 61000-3-2 for harmonics and IEC 61000-3-3 for flicker, with the relevant immunity standards. A complete CB package for a dimmable LED driver covers safety, EMC, and the specific dimming inputs, and it becomes the reference file that regional certificates are built on.

The conversion from a CB report to a national certificate is where the work actually happens. Each country has national deviations from the IEC standard, and the local certification body reviews the CB report against those deviations. For Europe, the CB report underpins the CE declaration, though CE itself is self-declaration and does not require a third-party certificate. For North America, the CB report can be converted to a UL or ETL listing by a US body, with the difference that UL adds its own follow-up factory inspection. For Australia, the CB report supports the RCM registration. For Japan, the PSE mark uses the CB report as the technical basis.

The commercial value shows up in speed and cost. Testing a driver from scratch for the European market takes three to four months and costs a significant five-figure sum. Converting an existing CB report to a national certificate typically takes four to eight weeks and a fraction of the cost. A manufacturer that starts with a CB report can roll out a product to a dozen markets over the course of a year, rather than over the course of a decade.

There are limits. The CB scheme does not cover the local plug, cord, or wiring, which are separately certified components. It also does not cover country-specific markings or file numbers that each regulator requires. And a CB certificate is tied to the specific model and components listed; a design change that substitutes a capacitor brand, changes a PCB layout, or modifies the enclosure requires a retest or a minor difference review. Buyers should ask whether the CB report covers the exact model on the order, not just a sibling model in the same family.

For an exporter of waterproof dimmable drivers, the CB report is the single most valuable document in the technical file. It is the starting point for every regional certificate, it is what distributors ask for when they evaluate a new supplier, and it is what a customs broker pulls up when a shipment is held. A manufacturer without a CB report is rebuilding the testing cycle in every market it enters.