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Introduction and connection mode of Terminal block

Introduction and connection mode of Terminal block

Blog | Jan 13,2022

Terminal block is an electrical component used to connect lines in electrical equipment. The number of terminals in each row is different. The model can be determined according to engineering technical parameters.

In the electric power automatic connection system, the emergence of terminal blocks can be said to be the daily operation and maintenance personnel’s salvation, terminal blocks simple structure, rich variety, for the electric power partners to provide thousands of glaze speed solutions.

In particular, when the terminal in the connection is short-circuited due to burnout, the advantages of the terminal will appear. After power failure, it can immediately take out the burned terminal replacement of the same type of new products, thus greatly shortening the maintenance time. For general wiring terminals, they are mainly divided into the following connection modes:

screw connection

Screw Connection

Screw connection adopts screw terminal connection, Ampron electronics reminds you to pay attention to the maximum and minimum cross sections of the allowable connecting wire and the maximum tightening torque of different specifications of screws.



The most common type of welding is tin welding. The most important part of the solder connection is that the metal continuity should be formed between the solder material and the welded surface. So for wiring terminals, cord end terminals, the most important thing is solderability. The most common coating on the welding end of the wiring ring terminal is tin alloy, silver and gold. The common welding ends of the reed contact pair include the welding end type, the turbid-eye blasting end type and the notched welding end type. The common welding ends of the pinhole contact pair are the drilled arc notched.



Crimping is a technique of connecting wires to contact pairs in order to compress and displace the metal within specified limits. A good crimp connection can produce a metal intermelting flow that causes the wires and contacts to symmetrically deform the material. This connection is similar to the cold welding connection, which can achieve better mechanical strength and electrical continuity, and it can withstand harsher environmental conditions.

It is generally accepted that a correct crimping connection is better than tin explosion, especially when crimping must be used in high current situations. Special crimping pliers or automatic or semi-automatic crimping machine shall be used when crimping. According to the wire cross section of the cord end terminal and the cord end end, the right contact tube should be selected. Note that the crimping connection is permanent connection, can only be used once, can not be reused oh.

wire wrap

Wire Wrap

wire wrap is the direct winding of the wire on the angular contact winding column. When winding, the wire is wound under controlled tension, pressed into and fixed at the edges and corners of the contact-wrapped column to form an air-tight contact. There are several requirements for wire winding: the nominal value of wire diameter should be in the range of 0.25mm-1.0mm; The elongation of conductor material is not less than 15% when the diameter of conductor is not more than 0.5mm. All rights reserved. The elongation of conductor material is not less than 20%. Winding tools include winding guns and stationary winding machines.

puncture successive

Puncture Successive

Puncture connection, also known as insulated displacement connection, is a new technology invented by the United States in the 1960s, with high reliability, low cost, easy to use and other characteristics, has been widely used in a variety of printed board terminals, cold end, ring terminal. It is suitable for connecting ribbon cable.

It is not necessary to strip the insulation layer of the cable when connecting. The tip of the “U-shaped contact reed of the terminal is inserted into the insulation layer, so that the conductor of the cable slides into the groove of the contact reed and is clamped, so as to form a tight electrical connection between the conductor of the cable and the reed of the terminal. It requires only simple tools, but must use a specified cable gauge cable.

Introduction and connection mode of Terminal block

Zhejiang Lianhe electronics to provide you with professional terminal technology, a variety of series terminals for your choice, there are related questions welcome to ask, will try to answer for you!

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