The development of connectors is in line with the trend of the times. With the increasing use of our electronic products, mobile phones, computers, cameras and so on have higher and higher requirements for connectors. NEMA wiring device must be as small as possible in order to realize frequent commutation, but also to realize braking during commutation and acceleration after commutation. Therefore, it is necessary to adopt commutation device quickly and braking device effectively. Industrial plugs are suitable for industry, generally divided into 3-core, 4-core, 5-core, etc. The current is generally divided into 16A, 32A, 63A, 125A, 250A, 420A, etc., and the protection level can be divided into IP44 and IP67, which are relatively conventional. Generally, it is used with industrial sockets and industrial connectors. A switch is arranged between the weatherproof socket resistor and the electromagnetic switch, the fuse and the electromagnetic switch are connected with a power line, the power line is provided with a normally open switch of the electromagnetic switch, and the normally open switch of the electromagnetic switch is connected with the jack. This is not only a small problem, but also a problem of accuracy and perfection. Only the cee connector of the product can be better developed to meet the needs. The future potential of Cee connectors is huge, and the future of cee connectors is very exciting. Cee connector is not the main part of the equipment, but it is the key part. The connector is like a joint. Although it has no function of hands and feet, the display of all functions of hands and feet is very close.The main components of electronic connectors are transportation, communication, network, it, medical care, household appliances and so on. The rapid development of product technology and the rapid improvement of market have effectively hindered the progress of connector technology. Up to now, the connector has developed into a product with various specifications, various structural types, subdivision of professional direction, identification of industry characteristics, serialization of overall system standards and specialization of products.According to the Report Statement of China Connector Industry Market Prospect and Investment Opportunity Analysis in 2013-2017, the top five application fields of connector sales in the world are: transportation, computers and their peripherals, communications, industrial facilities, aerospace and military, while the applications with the top five growth rates are consumer electronics, transportation electronics, medical electronics, communication electronics, computers and peripherals.Now we have carefully analyzed the actual application status of connectors, and found that China has become the largest market for connectors. With the rapid growth of consumer electronic products, transportation electronic products and communication terminal markets, and the continuous transfer of global connector labor to Asia and China, Asia has become the most potential connector market, and China will become the fastest growing and largest connector market in the world.China's Middle East connectors are mainly low-end, and the occupancy rate of high-end machines is relatively low, but it needs faster growth. At present, the development of connectors in China is in the transitional period from production to invention. In the field of high-end connectors, computers and peripheral devices occupy the largest market share, and the market share of connectors for transportation and medical equipment is also high. The market share of domestic transportation connectors is about 20%, 3g and 4g mobile phones are rapidly spreading, and high-end connectors need to be improved rapidly.Generally speaking, the development of connector technology highlights the following unique features: high-speed and digitization of signal transmission, integration of various signal transmission, miniaturization of product size, low cost of products, surface posting of contact terminals, combination of plates, convenience of plugging and unplugging, etc.