What are the main types of PCB connectors, their functions and characteristics, and what are the electrical performance parameters?

PCB connector, full name Printed Circuit Board connector, is a special PCB (Printed Circuit Board, printed circuit board) on the circuit connection of the electrical connector.PCB connector is usually by the plug (plug) and socket (seat) two parts, through the plug and socket plug and pull to realize the electrical connection or disconnection, widely used in electronic equipment, communications equipment, automotive electronics, industrial control equipment, medical equipment and other fields. PCB connectors are widely used in electronic equipment, communication equipment, automotive electronics, industrial control equipment, medical equipment, etc. The main types of PCB connectors include the following: 1. Board-to-board connectors: Used to connect the electrical connection between two PCB boards, usually connected in the vertical direction, to achieve the signal transmission between different circuit boards and power transfer. 2. Wire-to-board connectors: Used to connect the electrical connection between wire and Wire-to-board connector: Used to connect wires and PCB boards, usually through the plug and socket pins and jacks between the realization. 3. Board-to-wire connector: Used to connect PCB boards and wires, usually through the plug and socket pins and jacks between the realization. 4. Flexible connector: The use of elastic materials as a connecting medium, through the elastic deformation of the realization of the electrical connection, suitable for the need to frequently disassembled or flexibly connected occasions. 5. FPC / FFC connectors: used to connect the flexible circuit board (FPC, Flexible Printed Circuit) or flat cable (FFC, Flat Flexible Cable) and the electrical connection between the PCB board, usually has a low insertion force and high reliability of the connection. PCB connectors have the following main functions: 1. Electrical Connection: PCB connectors through the plug and socket insertion and removal to achieve electrical connection or disconnection, between the circuit board or wire and circuit board signal transmission and power transfer.2. Mechanical fixing: PCB connectors usually have a mechanical fixing function, the plug and socket can be firmly fixed in the PCB board to ensure the reliability and stability of the connection.3. Space-saving: PCB connectors are usually compact design, can be used in the PCB board, and can be used in a variety of applications. Usually use compact design, can realize the circuit connection in the limited space, so as to save the space of the PCB board.4. Plugging performance: PCB connectors need to have good plugging performance, can be in the case of frequent plugging and unplugging to maintain a stable electrical connection, so as to meet the needs of the equipment.PCB connector features, characteristics and electrical performance parameters: 1. Electrical performance parameters: including the rated current, Rated voltage, electrical impedance, insulation resistance and so on. These parameters determine the connector in the actual application of electrical performance, such as whether it can withstand the required current and voltage, as well as whether to meet the requirements of electrical isolation and insulation.2. Mechanical characteristics: including insertion and extraction force, insertion and extraction times, mechanical life. These parameters determine the solidity, durability and reliability of the connector in actual use, including plug and socket between the plug and socket force is appropriate, whether the connector can withstand the expected number of times of insertion and removal and service life. 3. size and shape: including the size of the connector, the shape of the connector, the way of mounting and so on. These parameters determine how the connector is installed on the PCB board, the space it occupies, and the connector's adaptability and compatibility.4. Environmental adaptability: Including the connector's operating temperature range, protection level, seismic performance, and so on. These parameters determine the stability and reliability of the connector in different environmental conditions, such as the ability to adapt to high temperature, low temperature, humidity, vibration and other harsh environments.5. Material properties: including the connector's material, electrical conductivity, corrosion resistance, etc.. These parameters determine the conductivity, durability and corrosion resistance of the connector, thus affecting the reliability and long-term stability of the connector in the actual application.6. Interface type: including the connector's interface type, such as pins, sockets, board-to-board, wire-to-board, board-to-wire and so on. These parameters determine the connector's application scenarios and connection methods, whether it can meet the needs of specific applications.7. EMC performance: including the connector's anti-interference performance, anti-electromagnetic radiation performance, etc.. These parameters determine the connector's performance in the electromagnetic environment, such as whether it can resist interference, reduce electromagnetic radiation, etc. 8. Reliability and certification: including the connector's reliability indicators and certification, such as UL, CE, RoHS certification. These parameters determine the quality and credibility of the connector, especially important for applications requiring high reliability and compliance.

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