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Do you know the types of electrical connectors?

Connectors are electrical components that are often used in our various life scenes. They are also called socket plugs and connectors in China. As electrical connectors, connectors have become indispensable parts in electronic equipment. , And according to different usage scenarios and different application objects, connectors are also divided into many styles and types, so what are the types of connectors?

In fact, there is no fixed classification of connectors. They are generally classified according to use, shape, structure and performance! According to the purpose, the connectors are divided into mobile phone connectors, power connectors, high-voltage connectors, automotive connectors, aviation connectors, high-speed signal connectors, optical fiber connectors, etc., and according to the shape, the connectors It is divided into four types: circular connectors, rectangular connectors, bar connectors and D-type connectors. Among them, circular connectors and rectangular connectors are the most common! According to the structure, the connectors are divided into: threaded connectors, in-line connectors, card lock connectors, push-pull connectors and bayonet connectors!

Let's get to know the types of sorting

(1) Terminal

Terminals are often used for the connection between electronic appliances and external equipment. It can be divided into two forms: one is the ordinary terminal on the left side of the figure, which is characterized by directly pressing the connector of the connecting wire through the fastening nut. In the hole; the other is the banana plug and socket on the right side of the picture, which is characterized by welding the connecting wire on the plug and then plugging it together with the socket. Since the spring on the plug is shaped like a banana, the terminal is also called "banana plug, socket".


USB interface

Because the USB interface has the advantages of fast data transmission, support for hot swap, flexible connection, independent power supply, etc., in recent years, it has been widely used in various digital products.

(3) Audio plug and socket (hole)

This type of connector is mainly divided into two-pin plugs and sockets and three-pin plugs and sockets. It can easily connect or disconnect audio equipment and external equipment (such as earphones, microphones, etc.) at any time. As the name implies, two-pin plugs and sockets can be plugged into two-wire devices at the same time, suitable for transmitting single-channel audio signals, and three-pin plugs and sockets can be plugged into three-wire devices at the same time, suitable for transmitting stereo (two-channel) audio signals .

(4) Printed circuit board socket

The matching "plug" is actually an application circuit board. This socket is widely used in various instruments, meters and computers. It has many specifications, which can be divided into single row (used for single-sided printed circuit boards) and double row (used for double-sided printed circuit boards). , There are many kinds of pin numbers, and there are many specifications of pin pitch. Such sockets are generally provided with positioning grooves, and some are also provided with an opening key and a locking key.

(5) AC power plug and socket

This type of connector is divided into two categories: two-pole power plug and socket and three-pole power plug and socket. They are used to transmit 220V alternating current in various electronic and electrical equipment. It should be pointed out that there are many types and specifications of this kind of connectors. As far as machine-mounted sockets are concerned, some sockets are power output sockets that can be inserted into the plugs of ordinary household appliances; but most sockets are power input sockets. Insert the ordinary plug with exposed electrode, only the matched non-electrode exposed plug (namely output plug).

(6) Special connectors for circuit boards

This type of connector consists of a socket that can be directly welded on the circuit board and a plug that is connected to a transmission wire. It has a variety of specifications and can be divided into two categories: single-lead and multi-lead. This type of connector is characterized by flexible use, small footprint, and convenient plug-in.

(7) Low-voltage power plugs and sockets

This type of connector is improved on the basis of audio two-pin plugs and sockets, and is specially used to plug in various small electronic devices and supporting external power supplies. The biggest difference from audio two-pin plugs and sockets is that the plug has a tubular shape with an inner. The outer sides are used as the two electrodes of the power supply, which fundamentally avoids the unavoidable momentary short circuit (referring to the two poles of the plug) when the audio two-pin plug is inserted into the socket; the socket electrode matches the tubular electrode of the plug , It also has an automatic switch function, which can automatically cut off the power supply inside the machine when the external power plug is inserted into the socket.

(8) IC socket

The socket is designed for use with integrated circuits. . In addition to the most common dual-in-line package, this special socket also has a variety of packaging forms such as single-in-line and quad-in-line, and its specific specifications are compatible with the corresponding integrated circuits. In actual application, the socket is directly soldered on the printed circuit board, and the integrated circuit is directly inserted into the socket through its pins. The advantage of this is that there is no need to solder integrated circuits on the printed circuit board, which brings great convenience to repair and replacement of integrated circuits.

(9) Terminal block

The terminal block is mainly used for the connection between the circuit board and the circuit board of the electronic appliance, the circuit board and the device or component. It can be divided into two forms: circuit board welding type and bidirectional wiring type (pure wiring type): circuit board welding One end of the type is made into a solder foot, which can directly weld the terminal block on the circuit board, and the other end is used to fasten the connector of the connecting wire in the wiring hole by a fastening screw.

There are many types of connectors with different functions, and sometimes the parameter items that reflect product performance are not exactly the same. However, the following basic parameters have commonalities and users must master them. There are many types of connectors, and there is no fixed classification. The above are the more common types of connectors. Of course, they are certainly not limited to the above types. As for other types, they are divided according to installation methods, special performance, etc. There are also many types of connectors.

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