Common faults of terminal blocks:

The meaning of prevention

The plastic insulating material and conductive parts of the terminal are directly related to the quality of the terminal, and they respectively determine the insulating and conductive properties of the terminal. The failure of anyone terminal will lead to the failure of the entire system engineering. The painful lessons at home and abroad in this regard are very profound.

Prevention is the goal, and analysis is the foundation. In a sense, preventing failure is more important than analyzing failure. It has a more realistic meaning for ensuring the quality and reliability of the terminal.

From the perspective of use, the function of the terminal block should be: the conductive part of the contact part must be conductive, and the contact is reliable. Places, where insulation should not be conducted, must be insulated and reliable. There are three common fatal failure forms of terminal blocks:

Poor contact

The metal conductor inside the terminal is the core part of the terminal. It transmits the voltage, current, or signal from the external wire or cable to the corresponding contact of the connector. Therefore, the contact must have an excellent structure, stable and reliable contact retention, and good electrical conductivity. Due to the unreasonable structure design of the contact parts, wrong material selection, unstable molds, out-of-poor processing dimensions, rough surface, unreasonable surface treatment processes such as heat treatment and electroplating, improper assembly, harsh storage, and use environments, and improper operation and use, all contact parts will be damaged. The contact part and the matching part cause poor contact.


Poor insulation

The function of the insulator is to keep the contacts in the correct position and to insulate the contacts and the contacts, and between the contacts and the housing. Therefore, the insulating parts must have excellent electrical properties, mechanical properties, and process forming properties. Especially with the widespread use of high-density and miniaturized terminals, the effective wall thickness of the insulator becomes thinner and thinner. This puts more stringent requirements on insulating materials, injection mold accuracy, and molding technology. Due to the existence of metal excess on the surface or inside of the insulator, surface dust, flux, and other pollution and moisture, organic material precipitates and harmful gas adsorption film merge with the surface water film to form ionic conductive channels, moisture absorption, mold growth, aging of insulation materials, etc. Will cause short-circuit, leakage, breakdown, low insulation resistance, and other poor insulation.

Poor fixation

The insulator not only provides insulation but also provides accurate centering and protection for the protruding contacts. It also has the functions of installation and positioning and locking and fixing on the equipment. Poor fixation, the lighter will affect the reliable contact and cause instantaneous power failure, the more serious is the product disintegration. Disassembly refers to the abnormal separation between the plug and the socket, the pin and the socket caused by the unreliable structure of the terminal in the plug-in state due to material, design, process, and other reasons, which will cause the power transmission and the control system. Serious consequences of signal control interruption. Due to unreliable design, wrong material selection, improper selection of molding process, poor quality of heat treatment, mold, assembly, welding, and other processes, and improper assembly will cause poor fixing.

In addition, due to coating peeling, corrosion, bumps, plastic shell flashing, cracks, rough processing of contact parts, deformation, etc., the appearance is poor, due to the out-of-poor positioning and locking fit size, poor processing quality uniformity, and total separation force Poor interchange caused by major causes is also a common disease and frequently-occurring disease. These types of faults can generally be found and eliminated in time during inspection and use.

Development analysis:

With the increasingly fierce competition in the terminal market, quickly and effectively grasping the market development has become the key to the success of enterprises and decision-makers. Market analysis is a scientific and systematic work that directly affects the planning of enterprise development strategies, the design of product marketing plans, the formulation of company investment policies, and the determination of future development directions. The market analysis does not simply evaluate the market from a certain level. To obtain practical and guiding conclusions, it is necessary to conduct a comprehensive and detailed analysis of the market from a professional perspective. Only in this way can we maintain a clear development mindset at all times, not get lost due to the plethora of information, and remain invincible in the increasingly fierce market competition. In response to this need of enterprises, we conducted in-depth research on the cable terminal market and wrote this report to help enterprises make decisions.

The report describes in detail the market environment of terminal products, current market development (including technology, supply, and demand, prices, raw materials), market development forecasts (market supply and demand and market development trends in the next five years), and on the basis of analyzing market competition, Industry investment prospects and investment value were analyzed (including investment risk, investment environment, investment barriers, investment income, etc.), and we put forward our suggestions for investment in cable terminal products.



The report is based on survey data from the National Bureau of Statistics, National Customs, Industry Association (Academies), and enterprises. In order to ensure the fullness, accuracy, reliability, and comparability of the data in the report, the report has carried out the necessary screening and grouping of statistical data, and closely combined the macro and microdata. The report uses quantitative analysis (including the application of economic statistical models, etc.), a combination of quantitative and qualitative analysis, and in-depth exploration of the inherent laws and potential information contained in the data. At the same time, statistical charts and other forms are used to display the analysis results clearly and intuitively. The multi-directional and multi-angle guarantees the system and completeness of the report content. It provides a decision-making basis for the development of the enterprise and the investment in cable terminal products. At the same time, it also increases the objectivity and reliability of the report's research conclusions.

After reading the above, you should understand the terminal block. For more articles related to the terminal block, we will continue to organize and publish the blog on the website. Interested users should remember to pay attention to our latest developments.