The main function of connectors is to transmit signals or conduct electricity, thereby achieving electrical connections. Widely used in various types of electrical cabinets, industrial control cabinets, and other equipment, it is a "bridge" that bears the role of current or signal connection.

There are many ways to classify connectors. Due to the different application directions of connectors, there are contact type and non-contact type. For example, fiber optic connectors and electrical connectors are contact type, while proximity switches are non-contact connectors; There is also the classification of electrical and optical signals. Today we will mainly talk about contact connectors for electrical signals.

Electronics and their components are important supporting interface components in equipment, dispersed in various systems and components of the equipment, responsible for the transmission of signals and energy. The quality of the connection is directly related to the safe and reliable operation of the entire system.

Electrical connectors interconnect to form various circuits, from high-frequency to low-frequency, from circular to rectangular, from high current connectors passing through hundreds of amperes to high-density connectors passing through weak signals, from ordinary printed circuit board connectors to quick separation and detachment. Almost all types and varieties of electrical connectors are widely used in various system engineering, ensuring the complete and normal operation of equipment functions.

Facing various types of application scenarios, the classification of industry connectors is also very complex. With the continuous progress of technology, connectors are increasingly used in the market, and the performance of different types of connectors varies greatly. Manufacturers will design connectors using materials with different characteristics based on the application environment to ensure stable and reliable use of connectors in different environments.

The reliability of electrical connections directly determines the performance of equipment systems. The performance of a connector is an overall performance evaluation, unlike the terminal of a connector, which can be easily evaluated from aspects such as material, design, and process.

For any molded product, connectors are essential, such as the commonly used USB, headphone jack, Ethernet interface, or the military customized interface that we rarely see. So based on a wide range of markets, the classification of connectors is also diverse.

1. According to the functions of internal and external connections in electronic devices, the interconnection level is divided into 6 layers:

a: Component to package interconnection;

b: Interconnection between packaging and circuit boards;

c: Board to board interconnection;

d: Component to component interconnection;

e: Interconnection of components to input and output interfaces;

f: Interconnection between systems.

2. Classification by structure:

Board to board connectors;

Board to line connectors;

Line to line connectors.

3. According to power classification:

Connector (power transmission);

Connector signal (transmission signal);

Connector high-frequency (data transmission).

4. Classification based on shape:

Connector, commonly used in military equipment;

Connectors are widely used and rapidly developing.

With the advancement of technology, connector classification has become more complex. But in terms of communication connectors, due to the coordination of software protocols, there is indeed little change and can be effectively distinguished.

a. Multi wire cable connectors, including DB connectors, DIX connectors, and DIN connectors.

b. Twisted pair connectors, including RJ45 and RJ 11 connectors;

c. Coaxial cable connectors include T connectors, BNC connectors, and terminal resistors.

Although the variety is abundant and the selection is difficult, it has also promoted the development of the entire electrical connection industry, making products more reliable, safer, and more user-friendly.