How many types of connectors are there? What are the five main categories of connectors?

A connector is one of the electronic components used to connect circuits between different devices. There are many different types of connectors, each suitable for different applications. Connectors can be divided into five categories: on-board connectors, high-frequency connectors, power connectors, modular connectors and hot-swap connectors.
　　I. Board-mounted connectors
　　Board-mounted connectors are a kind of connector, used to connect the internal circuitry on the circuit board and external circuitry. As the circuit board on the internal circuit lines are often more complex, so the use of on-board connectors can greatly improve the connection efficiency, reduce the error of manual operation and damage. On-board connectors are widely used in electronic products, such as computers, cell phones and other electronic devices are heavily used in the on-board connectors.
　　Second, high-frequency connectors
　　High-frequency connector is a high-frequency signal transmission has a better performance of the connector. High-frequency connectors are usually used in the need for high-speed data and image transmission to provide high-quality signal occasions, such as television broadcasting, communication networks. High-frequency connectors are designed with high-performance and extremely reliable technologies to ensure high-quality connection performance. Such as SMA, N, BNC and other connectors, they are widely used in radio frequency transmission, electronic measurement and high-speed data transmission and other fields.
　　Third, power connectors
　　Power connectors are used in electrical equipment, especially in electrical control systems and power supply applications. Power connectors are usually used to transfer large currents and voltages to electrical equipment, so that the equipment can operate normally. Power connectors are characterized by large size, robust structure, vibration resistance, high reliability and large contact point area. For example, the domestic commonly used GB, JB and other power connectors commonly used in electrical equipment.
　　Fourth, modular connectors
　　Modular connector refers to the connector composed of multiple modules, these modules can be connected to achieve different functions as needed. Modular connectors are widely used in many different occasions, such as network equipment, data acquisition equipment and electronic testing, computer work and other fields. Modular connectors use fast transportation technology, easy to use, simple maintenance, long service life, wide range of applications, is currently an important connector in the field of electronic components.
　　Fifth, hot plug connectors
　　Hot swappable connector is a connector with hot swappable function, used to protect equipment and components from accidental power failure or disconnection. Hot swappable connectors are widely used in a variety of computer rooms, data centers and network equipment and other occasions, can greatly improve the performance and service life of the equipment, but also to ensure the smoothness of data transmission and operation. Hot swappable connectors can automatically disconnect to avoid damage to the affected board or equipment, greatly improving the overall performance of the board and equipment.