Electronic components are the general name of components and devices. Electronic components: refers to the finished products whose molecular composition does not change in the process of factory production and processing. Such as resistors, capacitors and inductors. Because it does not produce electrons and has no control and transformation effect on voltage and current, it is also called passive device. Electronic device: refers to the finished product whose molecular structure changes in the process of factory production and processing. Such as transistors, electron tubes and integrated circuits. Also known as active devices, because it can generate electrons, control and transform voltage and current (amplification, switching, rectification, detection, oscillation and modulation, etc. ).

According to the classification standard, electronic devices can be divided into 12 categories, which can be summarized as vacuum electronic devices and semiconductor devices. The development history of electronic components is actually a condensed history of electronic development. Electronic technology is a new technology developed at the end of 19 and the beginning of the 20th century. It developed most rapidly and was widely used in the 20th century, and became an important symbol of the development of modern science and technology.

The electronic component industry is mainly composed of electronic component industry, semiconductor discrete devices and integrated circuit industry. Electronic components include: resistors, capacitors, potentiometers, electron tubes, radiators, electromechanical components, connectors, semiconductor discrete devices, electro-acoustic devices, laser devices, electronic display devices, photoelectric devices, sensors, power supplies, switches, micromotors, electronic transformers, relays, printed circuit boards, integrated circuits, various circuits, piezoelectricity, crystals, chronometers, ceramic magnetic materials and printed circuit substrates.

As for the quality of electronic components, there are CQC certification in China, UL and CUL certification in the United States, VDE and TUV in Germany, CE in the European Union and other domestic and foreign certifications to ensure the qualification of components.