1、 First, distinguish the concept of "connector", "terminal block" and "connector"

① Connector. Also called connector. It is a component that electronic engineering technicians often contact. Also called connectors, plugs and sockets. Generally refers to electrical connectors. That is, a device that connects two active devices to transmit current or signal.

② A connector is a positioning connector for connecting electronic circuits, which is composed of two parts, namely, the plug-in, and the connector, which can be completely separated under general conditions. The same place between the switch and the connector is to realize the conversion purpose of the connected circuit through the change of the contact state of the contact pair, while the essential difference is that the connector can only be inserted and pulled out, and the switch can realize the circuit conversion on its body, However, the connector cannot realize the transformation on the ontology. The contact pair of the connector has a fixed corresponding relationship. Therefore, the connector can also be called a connector.

③ The English name of terminal is Terminal. It is a kind of accessory product used to realize electrical connection, which is divided into the category of connector in industry. Terminal blocks are used to facilitate the connection of wires. They are actually a piece of metal enclosed in insulating plastic, with holes at both ends, which can be inserted into wires. Terminal blocks can be divided into WUK terminal blocks, European terminal blocks series, plug-in terminal blocks series, etc.

2、 Distinguish "connector", "wiring terminal" and "connector" from the scope of ownership

① "Connector=connector" is the first category, and terminal block is only one of the "connector" categories

What is the difference between connectors and connectors?

The connector is the connection between lines; The connector is the connection between wire and board and box. In real life, people often refer to the same thing vaguely.

② The terminal is part of the connector. Connector is a general term. In fact, the connectors we commonly use usually include two parts: rubber housing and terminal. Housing is mostly plastic, which plays a protective role, while terminal is metal, which plays a universal role.