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A terminal block is an accessory product for electrical connection and is industrially classified as a connector. With the increasing degree of industrial automation and increasingly strict and precise industrial control requirements, the use of terminal blocks has gradually increased. With the development of the electronics industry, the use of terminals has become more and more, and the types are increasing. In addition to the PCB board terminals, there are also hardware terminals, nut terminals, spring terminals and so on.

Terminal blocks can be divided into, European terminal block series, plug-in terminal block series, US-Japanese terminal block, building wiring terminal, fence type terminal block series, spring type terminal block series, track type terminal block series, through wall type Terminal block series, optocoupler type terminal block series, etc.


According to the company's situation, PCB terminals are divided into plug-in terminals, screw-type terminals, spring-type terminals, and fence-type terminals, but the specific models, different companies have different names.

Barrier terminal block

Fence type; middle needle position code is C; side needle position code is S; fixed position code is M; curved needle type code is R; wire type code is H; fence type product is simple in structure, plate type pressure line mode, intuitive , firm; wire diameter range: 0.5mm2-6mm2;

Plug-in terminal block

The product has a pitch of 3.5, 3.81, 5.0, 5.08, 7.5, 7.62 poles 2-24 lines, can be provided with a screw-mounted socket for matching, seismic connection. The plug uses a side attachment technique, ie the direction of the screw is perpendicular to the direction of wire entry.

Screw terminal block

Circuit board terminals have always been an important part of the electronics industry and have become an important part of printed circuit boards. The structure and design are more sturdy, the wiring is convenient and the screw connection is strong; the structure is compact, the link is reliable, and has its own advantages; the principle of lifting the wire body is used to ensure reliable wiring and large wiring capacity; the welding leg and the clamping line The body is divided into two parts, ensuring that the distance when tightening the screw does not pass to the solder joint and damage the solder joint; the outer casing is firm and reliable, and the stitch length is accurate.

Spring-loaded printed circuit board terminal

Spring-loaded printed circuit board terminals provide 2.54mm, 3.50mm, 5.00mm, 7.50mm, 7.62mm spacing; single core wire can be inserted directly without the aid of a handlebar, but smaller wires can be opened with a handlebar Wire clamping; no button specifications, the height can be greatly reduced, the wire can be easily removed by pressing a screwdriver when the wire is retracted; most of the spring-type terminals are combined one by one; the wiring method is very suitable for the communication system , lighting system, monitoring system and building wiring; various wiring directions, favorable assembly in a small space, can be arbitrarily combined with the number of contacts, easy to operate, suitable for high-density wiring needs.