Product categories & certification
Certification is often a key issue for electrotechnical products in the market. Because market conditions and certification requirements for such a huge array of products vary widely around the world, the IEC has found it most practical and convenient to distinguish four categories of products for EMC standardization purposes:
These are units that do not themselves have a final function but which are intended for inclusion in an apparatus (see the next category). They may be passive, like resistors, capacitors or integrated circuits, or active like power supply units and certain types of motor.
EMC Product standards may be developed for some components, particularly active ones, and these may serve for certification purposes.