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What is the difference between the terminal, connector and connector?

Promulgator : DIHAO Date : 2020-03-11

What is the scope of use of terminals, connectors, and connectors? How does it work? What is the application area? If there is this confusion, we will explain from three aspects:

First, the conceptual difference


It is an accessory product used to realize electrical connection. The metal conductor is encapsulated in an insulating plastic piece, and there are holes at both ends where the wire can be inserted.

For example, if there are two wires, sometimes they need to be connected and sometimes they need to be disconnected. Then you can connect them with terminal blocks, and they can be disconnected at any time without having to solder them or twist them Convenient.


It is also called a connector, which is a component that is often contacted by electrical engineering technicians. Also known as: plug, socket, generally refers to the electrical connector, that is, the device that connects two active devices to transmit current or signals.


A connector is a positioning connector for connecting electronic circuits. It consists of two parts, the connector and the connector. Usually they can be completely separated. The difference between a connector and a switch is that the change of the contact state can be used to achieve the conversion of the connected circuit. The essential difference is that the connector has only two states: inserted and removed. Implement circuit conversion. There is a fixed correspondence between the contacts of the connectors.

Differences in Attribution Scope

1. Connector = connector?

A connector is a wire-to-wire connection, and a connector is a wire-to-board and box connection. In real life, people often vaguely think of them as the same thing.

2.Terminal = connector?

Connector is a general term, and the terminal belongs to one of the categories of connector. Generally, the connectors we commonly use usually include plastic shells and terminals. The plastic shells are mostly plastics for protection; the terminals are metal for conduction.

3. The relationship between the three

In the field of electricians and electrical appliances, connectors and connectors (or connectors) refer to the same thing. It is generally understood that they are the ones that can be quickly connected by inserting and twisting with one hand without tools. And the terminal, need to use tools (such as screwdrivers, cold press pliers) to connect the two together, generally used for power input and output.

Differences in practical applications

Line connections can be said to be ubiquitous, so connectors are used in a wide range of applications in various industries. There are many types of connectors, including rectangular connectors, circular connectors, stepped connectors, and so on. Terminal blocks are generally rectangular connectors. Terminal strips are generally used in the electrical and electronic fields, for internal and external wiring of PCB circuit boards, printed boards and power distribution cabinets.

The range of use of terminal blocks is increasing, and the types are increasing. At present, in addition to PCB board terminals, the most widely used are hardware terminals, nut terminals, spring terminals, etc. In the power industry, there are special terminal blocks, terminal boxes, all of which are terminal blocks, single and double , Current, voltage, ordinary, interruptible, etc.

In short, connectors, terminal blocks, and connectors are different application expressions that belong to the same concept, and are popular names based on different practical applications.