I. Conceptual Differences
① Connector, also called a plug or socket , is a component frequently used by electronic engineers. In China, it is also known as a connector, plug, or socket. Generally, it refers to an electrical connector, which is a device that connects two active devices to transmit current or signals.
② A connector is a positioning joint for connecting electronic circuits. It consists of two parts: the plug and the connector. Under normal circumstances, they can be completely separated. The similarity between switches and connectors is that they achieve the purpose of switching the connected circuit by changing the contact state of their contact pairs. However, their essential difference is that connectors only have two states: insertion and removal. Switches can achieve circuit switching on their own body, while connectors cannot achieve switching on their own body. The contact pairs of connectors have a fixed correspondence. Therefore, connectors can also be called connectors.
③ Terminal block, also known as a terminal , is an accessory used to achieve electrical connections. Industrially, it falls under the category of connectors. Terminal blocks are used to facilitate the connection of wires; they are essentially metal pieces encased in insulating plastic, with holes at both ends for inserting wires. Terminal blocks can be categorized into WUK terminal blocks, European-style terminal blocks, and pluggable terminal blocks, among others.
II. Distinguishing by Scope of Belonging
① "Connectors = Plug-in" is the first major category, while terminal blocks are just one type within the "connectors" category. Connectors connect wires to wires; plug-in connects wires to boards or enclosures. In practical applications, they are often classified as the same.
② Terminals are part of a connector. "Connector" is a general term, but the connectors we commonly see usually consist of two main parts: the housing and the terminals . The housing is mostly plastic and serves a protective function, while the terminal is metal and serves a conductive function.
③ In the fields of electrical engineering and electronics:
Connectors, plugs, and inserts are all the same product. Simply put, they are the kind of things that can be quickly connected by hand with a simple plug or twist, without the need for tools.
In layman's terms, a terminal block is a device that requires tools, such as a screwdriver or pliers, to connect two things together. It is generally used for power input and output. Its English name is Terminal.
III. Differentiation in Practical Application
Electrical connectors, also known as plugs or connectors, are a subfield of electronic components primarily used for connecting circuits. In industrial production, wiring connections are ubiquitous, making connectors widely used across various industries.
Connectors come in many categories, such as rectangular connectors, circular connectors, and ladder connectors. Terminal blocks are a type of connector, generally belonging to the rectangular connector category. The application of terminal blocks is relatively limited, typically used in the electronics and electrical fields for internal and external wiring in PCB circuit boards, printed circuit boards, and power distribution cabinets.
The applications of terminal blocks are becoming increasingly diverse, and the types are also increasing. Currently, in addition to PCB board terminals, the most widely used are hardware terminals, nut terminals, spring terminals, etc. In the power industry, there are specialized terminal blocks and terminal boxes, which are full of terminal blocks, including single-layer and double-layer, current-carrying and voltage-carrying, ordinary and disconnectable terminals.
In general, "connector," "terminal block," and "plug" are different application manifestations of the same concept, named according to different practical applications.
