Automotive connection: domestic alternative acceleration, analysis of panoramic analysis of the industrial structure

Car connectors are widely used in power systems, body systems, information control systems, safety systems, vehicle equipment and other aspects.

With the acceleration of the intelligent trend of automobiles, the amount of vehicle sensors increases, the data transmission requirements (high-speed high-frequency large data volume) increase accordingly, the amount of intelligent connected connectors also increases, and new categories such as high-voltage connectors, high-speed connectors and other new categories The amount in the car is expected to usher in a jump.

Overview of the car connector industry

Overview of the car connector industry

As a key basic component, the connector is used to realize the connection between the wires, cables, printing circuit boards, and electronic components, thereby transmitting signals or electromagnetic energy, and maintaining changes such as distortion and energy loss between the system and the system.

The main function of the car connector is to achieve the connection of various equipment inside the car. For example, the audio equipment or power sensing equipment needs to be connected through the car connector to improve the adaptability between each equipment to ensure the safety and stability of the vehicle sex.

Its types include round connectors, radio frequency connectors, FCP connectors, I/O connectors, etc.

Car connectors have high technical and production technology barriers, which are specifically reflected in mechanical performance, electrical performance, and environmental performance.

Car high-pressure connector

Car high-pressure connector

In traditional cars, the connector is mainly low-pressure.

In the new energy vehicle electrical connection system, the three electronics system is the core incremental component of new energy vehicles. The high-voltage connection system connects the three-electric system like a nerve. Its main function is to ensure that the vehicle’s high-voltage interconnection system, that is, in the internal circuit of Blind or unprepared bridges circulates current.

Car high-frequency high-speed connector

Car high-frequency high-speed connector

Car high-frequency high-speed connectors can be divided into coaxial connectors (including FAKRA and Mini-Fakra, mainly transmit analogue signals) and differential connectors (including HSD and Ethernet connectors, connecting twisted cables, mainly transmitting digital signals) Essence

Intelligent car supporting data transmission speed has been increased from 150Mbps to 24Gbps, and the car has developed to integrated development to promote the use of MINIFAKRA and HSD to replace traditional FAKRA connectors.

With the volume of the autonomous driving models of the L3-L5 in the future, the demand for high-voltage and high-speed connectors is expected to increase index.

Car connector industry chain

Car connector industry chain

The upstream industries of the connected industry include metal surface treatment services, metal materials, plastic raw materials, etc. The cost of raw materials will be affected by commodity prices such as copper, tin, nickel and oil.

The competitive landscape of the downstream industry in the connection device is stable and mostly traditional industries, mainly including communication, automobiles, consumer electronics and industrial control.

Most of these industries are industries that have developed mature, with high viscosity in customers, and the market mostly shows a high concentration.

Therefore, the traditional connector market has high barriers, and it is difficult for domestic connectors to compete directly with these industries.

The car connector industry structure

The car connector industry structure

The development of automobile connectors is related to the maturity of the automotive industry.

The connection device industry has a high concentration, with sufficient competition. The traditional large manufacturer of traditional connectors has an absolute advantage, and it still has a trend of continuous improvement.

Since 1980, the market share of the top ten major connector suppliers in the world has increased from 38.0% to 60.8% in 2020. In 2020, Tyko Electronics’s share in the connector market reached 16%, Afino reached 12%, and Mo Shi accounted for 8% of the market share.

The automobile industry in the United States, Europe, Japan and other countries and regions started early. With long-term technology and customers accumulated in high-end high-voltage and high-speed connectors, they are in a competitive advantage.

In the context of the current domestic market demand and the limited production capacity of the international front-line connectors, high-voltage and high-frequency high-speed automobile connector manufacturers are expected to usher in a valuable domestic alternative window period.

The domestic high-voltage connector representative Ryochia started the first generation of high-voltage large-current connectors in 2012. The high-speed connector represents Yihua shares in 2015 and developed high-speed connectors.

The main manufacturers of domestic high-speed and high-voltage connectors include Yihua, Electronics, Limu Electronics, Hexing, Lixing Precision, Aerospace Electric, China Aerospace Optoelectronics, De Run Electronics, Yonggui Electric, etc.

On the whole, foreign manufacturers have strong innovation capabilities, with customer advantages, and occupy market leadership. Domestic manufacturers have the advantages of local supply such as flexible and short delivery cycles.

They are expected to seize opportunities such as policy support, connectors upgrade opportunities to explore new standards in the industry and support of downstream local manufacturers.

In the short term, domestic manufacturers are expected to seize the mid-to-low-end market by purchasing product design and using the Ethernet connector standard to formulate the right to raise the market and seize the opportunity of car network restructuring.


Wiring methods and advantages and disadvantages of in-line connectors

Through-hole Connector is a common type of electronic component connector, also known as a socket or plug. They are commonly used to connect electronic components or devices to circuit boards (PCBs). In-line connectors get their name because they plug directly into pre-designed slots or holes without additional soldering.

These connectors are usually made of metal or plastic and have multiple pins or pins, the number and arrangement of which vary depending on the specific application and needs. These connectors are widely used in electronic equipment, computer hardware, communication equipment, automotive electronics, etc., and are popular for their convenient and reliable connection methods. When assembling electronic equipment, in-line connectors can speed up the production process and facilitate the maintenance and replacement of failed components.



In-line connectors play a vital role in electronic equipment and circuits, and their functions and functions mainly include the following aspects:

Circuit connection: used to establish a circuit connection between electronic components, modules or equipment. They allow components on a circuit board (PCB) to be connected with other boards, wires or cables to form a complete electronic system.

Signal transmission: The pins or pins of the connector are connected to realize signal transmission. These signals can be data, audio, video, control signals, etc., allowing efficient communication and exchange of information between different components.

Power connection: It can be used to connect the power cord to pass the power from the power adapter, battery or power module to the circuit in the device. They provide power input for the proper operation of the device.

Modular design: It is helpful to achieve modular design because it allows modules or parts with different functions to be plugged in and pulled out. This design makes the maintenance and upgrading of the equipment more convenient, and at the same time speeds up the production process.

Repair and replacement: Electronic devices using in-line connectors are easier to repair and replace. If an element is damaged or fails, it can be easily pulled out and replaced with a new connector

Equipment assembly: The equipment assembly process is simplified. On the production line, workers can quickly insert connectors into predetermined slots or holes, enabling efficient assembly.

Flexibility: The connector provides a reliable connection between the internal components of the device, allowing designers to have more flexibility in layout and connection, improving the degree of freedom in circuit design.

Wiring method

Wiring method

Wiring an in-line connector is usually a relatively simple process, but the exact steps and methods may vary depending on the connector type and application. Before wiring an in-line connector, you should ensure that you understand the specifications and requirements of the connector you are using, and take appropriate precautions, such as de-energizing, etc., to ensure safe operation. The following are the general wiring steps:


Make sure you have the correct type and specification of the in-line connector and the electronic component or device you need to connect it to.

Check that the pins and sockets of the connector match the design of the board.

Confirm the orientation of the connector, usually, there will be a mark or score on the connector to indicate the correct insertion direction.

Confirm pins and functions:

Consult your connector’s data sheet or spec sheet for the function and purpose of each pin.

Confirm the pins and corresponding functions of the electronic components you need to connect.

Plug-in connector

Insert the in-line connector into the corresponding slot or hole on the circuit board in the correct orientation.

Be careful not to insert the connector with excessive force as this could damage the pins or the board.

Connection pin

Make sure that the pins on the connector correspond correctly to the pins on the board.

Using a soldering tool and the appropriate solder, solder the pins of the connector to the pins on the board.

Pay attention to proper soldering to ensure that the solder joints are solid and reliable.

Test connection

After completing the soldering, you can check that the connection was successful using an appropriate test device or method.

A multimeter or test instrument can be used to check continuity and correctness between pins.

Please note that if you have no experience or are not familiar with the wiring and welding operations of electronic equipment, it is best to ask professional electronic technicians to do the wiring work to avoid possible damage and failure. Improper wiring and soldering can cause equipment damage, malfunction, and possibly even safety issues.

Advantages and disadvantages

Advantages and disadvantages

In-line connectors have many advantages and some disadvantages in electronic equipment and circuits

The main advantage

Ease of use: In-line connectors can be inserted and removed quickly and easily, making assembly, maintenance and replacement of equipment easier.

Reliability: When properly connected and soldered, in-line connectors provide a reliable electrical connection for stable signal and power transmission.

Modular design: In-line connectors support modular design, allowing modules with different functions to be plugged in and pulled out, making the design of the device more flexible and expandable.

High-density connection: DIP connector allows high-density connection in a limited space, suitable for scenarios requiring a large number of connections.

Rapid production: On the production line, in-line connectors can speed up the equipment assembly process and improve production efficiency.

Repairability: The in-line connector makes the repair of the device easier, and damaged parts can be replaced without replacing the entire device.

Wide application: In-line connectors are widely used in electronic equipment, computer hardware, communication equipment, automotive electronics and other fields.

Main disadvantage

Main disadvantage

Space constraints: Some application environments may have space constraints that prevent the use of large in-line connectors and require a smaller connection solution.

Pin count limitations: Some in-line connectors may have limited pin counts and are not suitable for complex circuit connection needs.

Soldering skill requirements: The soldering of connectors requires certain skills and experience, and improper soldering may lead to unreliable connections.

Limitation of mating times: The pins and slots of the in-line connector may wear out after repeated mating and removal, affecting the connection quality.

PCB support is required: In-line connectors require proper PCB design and soldering, and are not suitable for connection requirements of some special materials or non-standard PCBs.

In simple terms, the advantages of in-line connectors are convenience, reliability, flexibility and speed, but in some specific application scenarios and design requirements, it may be necessary to consider its space and pin number limitations, as well as appropriate soldering techniques. Proper selection and use of in-line connectors can maximize their advantages and meet the connection needs of specific equipment.

PCB support is required

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Introduction to the general design of connectors

Connectors are also called connectors. Also known as joints and sockets in China, they generally refer to electrical connectors. That is a device that connects two active devices, transmitting current or signals.

The male end and the female end can transmit information or current after contact, also known as a connector. This article introduces some conventional designs of connectors.

The function of the barb design of the connector terminal

The barb design of the connector terminal can effectively improve the connection stability and reliability of the connector. The barbs can increase the friction between the terminal and the plug, making them lock together more tightly, preventing loosening or falling off when plugging and unplugging.

In addition, the barb can also cooperate with the pin on the connector to make the connection stronger and prevent the pin from accidentally jumping out, thereby preventing wrong insertion and shaking.

Common anti-misplacement and fool-proof designs for connectors are as follows:

Physical shape: The shape, colour, shape and other physical characteristics of the connectors are different. Some connectors are also equipped with rib grooves or dense patterns in the flat socket for correct assembly.

Appearance marking: The connector is usually marked with information such as polarity, lead number or code on a prominent position on the appearance so that it can be inserted or fixed correctly.

Mating design: Some connectors are designed to be used as a pair, that is, different connectors can only be inserted or fixed if they are matched correctly.

Internal guide: The internal design of the connector can use guide shapes or protrusions and other structures, so that only certain plugs with corresponding shapes can be inserted in certain positions, thereby preventing misalignment.

Security feature: A bite or bayonet area is processed in the plug or socket. When the plug is inserted into this area, it can ensure that the plug is in the correct position, thereby preventing the plug from being misplaced or reversed.

These designs can reduce the error rate of the connector and improve the reliability and stability of the equipment.

The above is an introduction to the conventional design of connectors. Zhejiang Lianhe Electronics Co., Ltd. is a professional manufacturer of connectors. Welcome new customers to come to buy.

How to choose a waterproof plug for a car wiring harness connector?

In the car, the whole vehicle can be divided into dry area and wet area. There are differences between dry and wet areas. As the neurons of the car, the waterproof performance of the wiring harness in different areas also has different protection level requirements, which can ensure the normal operation of the entire circuit. Wiring harnesses with different levels of protection can ensure that the performance of the vehicle is in the best state during operation.

After the selection of the waterproof plug after the connector is selected, there are also several important parameters to refer to, such as: the inner and outer diameter of the waterproof plug, the outer diameter of the blind plug, the inner diameter of the connector hole, and the outer diameter of the wire insulation. Whether the relationship between these data matches well determines the stability of the waterproof performance of the waterproof connector in the car under various working conditions.

How to select the sealing plugs?

The following is some introduction to the selection of sealing plugs.

How to choose a waterproof plug for a car wiring harness connector?

1.Definition of the wet area in the middle area of automotive wiring harness

Dry area: The wiring harness installed in the cab, crew room, luggage compartment, etc., does not need to do special waterproof protection treatment area.

Wet area: The area where the wiring harness requires special waterproofing, except the dry area.


2.Definition of sealed wire and connector lumen in wiring harness

It is used to isolate the connecting part of the connector and the outer wall of the wire from the external environment. Sealed wire is also called waterproof peg or waterproof plug, which plays a role of protection and sealing. It is usually a soft rubber piece, which is used to plug the socket of the connector without the wire inserted, and the sealing function is the blind plug; generally, there are two states: soft rubber and hard plastic rod. In special cases, the connector itself has a waterproof rubber pad.

How to choose a waterproof plug for a car wiring harness connector?

The principle of waterproof plug selection

Under normal circumstances, when the waterproof connector is in the factory, the waterproof level of the plug has been determined, and the required sealing plug is also developed accordingly. If the wiring harness factory faces a relatively single customer and the product type is relatively single, then the selection, procurement, storage and use process of the waterproof plugging material is also relatively simple and convenient. However, as the wiring harness factory faces more diversified customers and the product types are more complicated, the selection, procurement, storage, and use of waterproof plugging materials are very complicated tasks for the procurement and management departments of the wiring harness enterprise. In order to simplify the process, corresponding integration can be carried out according to the following rules, reducing the types of materials and reducing the pressure on procurement and storage.

The waterproof performance is reflected by relying on soft rubber parts to fill the wire insulation layer with the inner hole of the connector, so as to isolate the inner cavity of the connector from the outside world. Plug the hole where the connector does not enter the wire with a blind plug to prevent liquid from entering. The size of the drain bolt, wire and connector should be closely matched.Connector hole inner diameter D1, wire insulation outer diameter D2, sealing plug inner diameter D3, sealing plug/blind plug outer diameter D4, as shown in Figure 1 below.

The relationship between the four kinds of outer diameters is as follows:

D1<D4, D3<D2

Considering the tolerances in the processing of connectors and sealing plugs, the relationship between the dimensions of the four outer diameters is:
D4-D1≥0.3mm, D2-D3≥0.3mm

Special attention should be paid to these dimensional relationships when selecting waterproof plugs.

Specifications for the assembly of waterproof bolts and blind bolts

The actual assembly of waterproof plugs and blind plugs is closely related to the waterproof performance of the connectors, and is a key factor to ensure the waterproof performance of waterproof connectors. Unless otherwise specified, waterproof plugs and blind plugs are not allowed to leak above the hole plane of the connector. Special connectors are implemented according to special requirements. In order to reduce the friction between the waterproof plug, blind plug and the outer wall of the connector, some silicone oil can be properly applied to increase the lubricity during implantation, but it is strictly forbidden to use machine oil instead.

When the waterproof plug is threaded on the wire, the leakage size of the wire insulation is also a critical size. Under normal circumstances, the wire insulation should leak outside the end face of the waterproof plug, but not more than 1 mm, as shown in Figure 3 below.

How to choose a waterproof plug for a car wiring harness connector?

When the wire is sealed or crimped through the sleeve, avoid the sealing plug being pierced. After the waterproof plug is riveted through the sleeve,the wire conductor and the wire insulation layer should be visible in the connection area B. See Figure 4 below.

How to choose a waterproof plug for a car wiring harness connector?

Waterproof performance verification

For the waterproof performance of waterproof connectors, different Oems have different requirements for the distribution of connectors. For example: some vehicle manufacturers require that the waterproof capacity of the connector in the wet area is required to reach IPX7, that is, it is required to prevent the effect of short time immersion, and the amount of water into the shell will not reach harmful levels after entering the water that reaches the pressure.The tested connectors are immersed in water according to the installation state specified by the manufacturer:

  1. When the height of the connector is less than 850 mm, the lowest point of the connector should be 1000 mm below the water surface.
  1. When the height of the connector is equal to or greater than 850 mm, the highest point of the connector should be 150 mm below the water surface.
  1. The duration of the test in water is at least 30 minutes.
  1. Thetemperature difference between the water temperature and the connector is not greater than 5K.
  1. If the waterproof test is carried out on the connector equipped with wires, the length of the wires must be greater than 1 meter to prevent the end of the wire from being immersed in water and the wire sheath from being damaged. There are gaps between the multi-strand copper wires of the wire core, and the insulation skin forms a pipeline. If the end of the wire is immersed in water, water can enter the cavity of the connector along the pipeline formed by the wire insulation layer.

After meeting the above conditions, if no water accumulation occurs, the waterproof performance is judged to be qualified. The verification method of waterproof performance test is shown in Figure 5.

How to choose a waterproof plug for a car wiring harness connector?

The non-original connectors are matched with waterproof plugs and blind plugs.After selection and matching, it is necessary to pass the waterproof test before it can replace the waterproof plug and blind plug matched by the original connector.Substitutes that have not been verified by waterproofing tests shall not be used in actual manufacturing processes.


Combined with the actual processing practice and the above discussion, the following conclusions are drawn. The selection and application of the waterproof plug of the waterproof connector in the wiring harness directly affect the process quality of the product processing. Waterproof bolts/blind bolts, wires, and connectors must be closely matched. In the selection process of waterproof plugs and blind plugs, the corresponding integration can be carried out without violating the relevant quality requirements of matching gap size and crimping, reducing the types of waterproof plugs and blind plugs, and reducing the inventory and storage management of such products pressure.

In addition, this practice can bring the following benefits, such as, avoid the delivery pressure caused by the long procurement cycle of the original waterproof plug and blind plug and the tight delivery time of customers. It can also reduce the pressure caused by unstable order quantity, multiple varieties, multiple batches, and small single order capacity. It can save the cost of human resources, operation management and quality management within the company.

LHE New product recommendation

LHE recently developed a new product, the following is the introduction of the new product


D6301-H02 is replacement of JST PS-250-2A-15,Secure locking mechanism and Low insertion force。
Stable contacting performance,Misinsertion (reverse insertion) prevention structure for the contact。
Misinsertion prevention structure for the tab (Short type housing),Glow wire compatible products are also available for short type housings performance。

LHE New product recommendation


P0022-T is replacement of TE 62308 terminals, Pigtail Splice, Splice Capacity 3, Serrated,3000 – 7000 CMA Wire Size, Brass, AMPLIVAR

LHE New product recommendation


A20010 connector is replacement of JST PNI-H series connector
2.0mm pitch,widely use in board-to-wire connection with secure locking
device that has been designed to high box type, with a mounting height of 19.95mm (including retainer) and 6.65mm in depth.
Low insertion force type contact is adopted and it provides excellent operability.Retainer is available as usage.

LHE New product recommendation

Above is the recent development of new products, if you are interested, please feel free to contact our salesman.

Terminal analysis and scope of use

A terminal is an electronic component used to connect power or electrical equipment, also known as a connector. It usually includes a socket and a plug, which can be inserted into the socket for electrical connection. Terminals are used in a wide range, covering many fields, such as electronics, automation, communications, aviation, automobiles, etc.

A terminal is an electronic component used to connect power or electrical equipment

In the electronics industry, terminals are often used to connect power, signal, and dash connections, such as power adapters, batteries, audio, video, data, etc. In the automation and machinery industry, terminals are often used to connect motors, sensors, switches, relays, and other equipment. In the field of communication, terminals are used to connect telephones, computers, routers, switches, and other equipment. In the aviation and automotive industries, terminals are widely used to connect equipment such as power supplies, signals, lights, and sirens.

In the electronics industry

There are many types and specifications of terminals, which are divided into plug-in terminals and screw-type terminals according to the connection method; they are divided into various types according to factors such as external dimensions, conductive materials, and current capacity, such as round terminals, square terminals, tubular terminals, board bottom terminals, etc. Terminals can play a good role in circuit design and manufacturing, improving the stability and reliability of the system.

There are many types and specifications of terminals

Zhejiang Lianhe Electronics is a company specializing in the production of connectors. Our products have excellent performance and can meet the needs of different industries. Welcome new and old customers to come to buy。

The contribution of Zhejiang Lianhe Electronics Co., Ltd. to the connector industry

Zhejiang Lianhe Electronics Co Ltd is a leading manufacturer of electronic connectors, wiring harnesses, and cable assemblies in China. The company has been serving the connector industry for more than a decade and has made significant contributions to the development of the industry.

Zhejiang Lianhe Electronics Co Ltd has developed a wide range of connectors, including board-to-board, wire-to-board, wire-to-wire, and FPC/FFC connectors.

The company also offers customized solutions to meet specific customer needs. The connectors developed by the company are widely used in various industries including automotive, consumer electronics, medical devices, lighting, and communication.

Lianhe Electronics

The company has invested heavily in research and development to continuously improve its products and processes. Its products meet international quality standards such as RoHS, REACH, and UL.

The company’s production facilities are equipped with advanced machinery, tools, and equipment to ensure efficient production and timely delivery of orders.

Zhejiang Lianhe Electronics Co Ltd also focuses on environmental protection and sustainability. The company has implemented various initiatives to reduce its carbon footprint, reduce waste, and conserve energy. It also advocates for responsible sourcing of materials and ethical business practices.

environmental protection and sustainability

Some of the major contributions of Zhejiang Lianhe Electronics Co., Ltd. to the automotive connector industry include:

High-performance connectors:

LHE brand connectors are designed to provide high-performance features that allow them to withstand harsh automotive environmental conditions. These connectors are made of high-quality materials which increases their durability and reliability.

Diversified product range:

LHE brand connectors provide a diverse range of products to meet the various needs of modern vehicles. This includes connectors for powertrain systems, body electronics, infotainment systems, and other critical automotive applications.

Customizable Solutions:

LHE brand connectors offer customizable solutions, allowing automakers to develop connectors that meet their specific requirements. This allows manufacturers to tailor the connector to their specific needs, increasing efficiency and saving costs.

Customizable Solutions

Continuous Innovation:

LHE brand connectors are continuously developed and improved to meet the changing needs of the automotive industry. This means providing manufacturers with cutting-edge solutions that allow them to stay ahead of the competition.

Overall, LHE brand connectors have made a significant impact on the automotive connector industry by providing high-quality, customizable, and innovative solutions that meet the needs of modern vehicles.


Zhejiang Lianhe Electronics Co Ltd’s contribution to the connector and auto connector industry is significant. Its innovative products, customization capabilities, and commitment to quality and sustainability have helped the company earn a reputation as a reliable and trusted partner in the industry.

Why is the terminal defective?

The terminal is a metal part set in the insulating material of the connector, and its function is to guide the wire to make an electrical connection with the electronic device. With the increasingly stringent requirements for industrial automation control precision, the number of terminals is increasing, but there are also some bad factors in the use of terminals.

During use, the mating terminals of the connector may have peeling, corrosion, scratches on the coating surface, flashes and cracks on the plastic shell, rough processing or deformation of the tight contact parts of the contacts, etc., resulting in poor appearance.

mating terminals

Poor terminal insulation

The function of the terminal insulator is to hold the contacts in the correct position and to insulate the contacts from each other and from the housing. Therefore, 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 insulators is getting thinner and thinner. This puts forward stricter requirements on insulating materials, injection mold precision, and molding process.

Poor terminal insulation

Poor terminal fixation

Terminals need to be fixed in a specific position for a stable connection. If the installation is not perfect or the product plug-in life cycle is insufficient, it will lead to poor fixation, which will affect reliable contact, cause instantaneous power failure, or disintegrate the product in severe cases.

Disintegration refers to the unreliable structure of the terminal block in the plugged state due to materials, design, process, and other reasons, resulting in abnormal separation of plug and socket, pin and socket, which will cause serious consequences of interruption of power transmission and signal control of the control system.

Due to unreliable design, wrong material selection, improper selection of molding process, poor quality of heat treatment, mold, assembly, welding, and other processes, improper assembly, and other reasons. , causing poor fixation.

Poor terminal fixation

Poor contact with terminals

The metal conductor inside the terminal is the core part of the terminal, which transmits power and signals to other parts that come into contact with it. Therefore, the metal conductor inside the terminal must have good electrical conductivity.

If the design of the contact is unreasonable, the material is selected incorrectly, the size is not up to standard, or the plating is not properly processed, it will cause poor contact with the connector terminal.

Poor contact of terminals

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The company has complete qualification certificates, a strong technical force, excellent processing equipment, perfect inspection equipment, and strong research and development capabilities.

It provides you with green and high-quality connectors and is your most loyal and reliable partner. If you are interested in products, please browse our website:, and contact us for a quotation.

Four points for attention in the use of connectors

The connector is generally composed of a plug and a socket, where the plug is also called a free-end connector, and the socket is also called a fixed connector. The connection and disconnection of the circuit are realized by plugs, sockets, and plugs, so various plugs and sockets are connected.

The following are key considerations for using analytics:


When the power connector is terminated, it should be terminated and inspected in strict accordance with the corresponding termination specifications or requirements, and terminated according to the corresponding contact number.

The thickness of the insulation layer between the selected cables and wires should match the distance between the contacts, and the cable core should match the terminals of the contacts. , and cross-parallel processing is prohibited between contact crimping holes;

When soldering, electric soldering iron with corresponding power should be selected according to the diameter of the bare wire, and the soldering time of each contact should generally not exceed 5s. Be careful not to

let the flux penetrate into the insulator, so as not to cause a decrease in the insulation resistance of the product.


Check before insertion

1. The model, code, serial number, plug position and direction of the power connector shall meet the requirements of the design and process documents;

2. The tail cover is not loose, and the binding opening is not falling off; [h]3) The wiring harness or wires at the tail door are not bent, and the outer skin is not damaged;

3. The grounding wire of the shielding skin is not broken, and the soldering piece connected to the shell is not loose;

4. The power connector shell and butt joint should have no deformation, cracks, thread wear, loose fasteners or defects, and the coating should not peel off;

5. The locking device should be in good condition.

The locking device should be in good condition

Plug Operation

Before plugging and unplugging, confirm the code name of the plug and socket to be plugged, the “shape” of the interface, “the positioning keyway”, “the positioning color code”, “and lock” and check the “tightening nails and slots” and “positioning screws and screw holes” at the interface Whether it is corresponding and accurately positioned;

During pushing or screwing into the power connector, the mating faces of the plug and receptacle should be aligned parallel to each other. After the cable or wire has been straightened, the locking sleeve is gently pushed in or slowly threaded along the axis into place and locked.

If you find that the two mating surfaces are skewed, the positioning is inaccurate, the hand feels tighter than normal, or there is an abnormal feeling such as blocking, stop the operation, pull it out along the axis, and check the status. After troubleshooting, reinsert the catch. Allows plugging and unplugging with special aids.

When the tail cap of the plug or socket is tightened, the cable or wire coming out of the tail cap cannot be rotated.

Plug operation


When testing cables or electronic equipment, the probes should meet the requirements. It is strictly forbidden to use test leads or copper wires for direct testing, so as to prevent the jack of the power connector from being enlarged or the inner wall damaged, or the pins from being crooked;

Before the test cable and the power connector on the electronic equipment are plugged in and tested, the power connector (plug and socket) on the test cable should be checked first. , Dust pollution, broken wires, and broken wires of the shielding skin cannot be plugged in;

During the test, the plugging and unplugging operation of the power connector should generally be carried out after the power supply is disconnected for no less than 3 minutes, and live plugging and unplugging are prohibited;


Zhejiang Lianhe Electronics Co., Ltd. is committed to becoming an excellent automotive connector and home appliance connector supply chain system solution provider. We focus on the field of connectors, including automobiles, household appliances, smart homes, security, etc. Welcome new and old customers to come to buy.

What are the application characteristics of automotive connectors?

From the purpose of using the car connector, in order to ensure that the car runs better, we can divide the reliability of the connector into the sealing of the connector in use, the performance of the car’s spark resistance during driving, and in the car’s During driving, the connector can also show shielding performance and temperature control performance.

Generally, when discussing the sealing of automotive connectors, it is not only the sealing performance of water in the car.

In this field, the current internationally popular management standard is IP67, and this standard is also a relatively high level in the automotive sealing industry. Although the requirements for waterproofing are different in different parts of the car, many car manufacturers will choose IP67 to ensure the sealing performance of their car’s connectors.

In the running of a car, the power supply is a very important energy source, not only related to the normal operation of the engine but also often involves the use of the power supply when people are driving.

Therefore, in the power system of the car, the car connector has different divisions, between the male connector and the device, between the male connector and the cable, between the male connector and the female connector, and the female connector. There are certain sealing measures between the terminal connector and the cable that can be implemented.

In realizing the sealing performance of the automobile connector, the sealing ring is a commonly used tool. This tool can not only achieve the effect of fixing between different hole positions but also achieve the effect of sealing.

It can not only ensure the stable operation of the automotive equipment but also ensure the waterproof performance of the automotive equipment during work. Most of the sealing rings are made of silicone rubber, which is made after a certain chemical change between liquid silicon and solid silicon.

Now that cars are in use, electronic circuit technology is an important aspect of the automotive industry, not only in the driver’s entertainment but also in the control system of the car when the driver is driving.

Electronic circuit technology plays an important role in the stable work of the car. In order to ensure that electronic circuit technology can work stably, people now apply a lot of shielding technologies in the production of automobiles.

These shielding technologies not only play a protective role in the electronic circuit of the car but also have the ability to resist interference and radiation in the components of the car. In addition, they can also protect the stable operation of the car connector. These shielding technologies in automobiles can be divided into two types: inner shielding and outer shielding.

When using outer shielding to protect automotive connectors, two identical shielding shells are usually used to assemble together to form a shielding layer, and the length of the shielding layer can cover the entire length of the connector, and the shielding shell should also ensure that there are sufficient locking plate structures to ensure the reliable installation of the shielding layer.

In addition, the shielding material used must not only be treated by electroplating but also be treated to prevent chemical corrosion.

Zhejiang Lianhe Electronics Co., Ltd. is a manufacturer specializing in connectors, board-to-board connectors, wire-to-board connectors, automotive connectors, and other connectors. The main products are automotive connectors, new energy connectors, and home appliance connections. device etc.

The company has complete qualification certificates, a strong technical force, excellent processing equipment, perfect inspection equipment, and strong research and development capabilities to provide you with green and high-quality connectors.

Introduction to the technical parameters of the connector

Electronic connectors (hereinafter referred to as connectors) can also be called plug sockets, which are widely used in various electrical circuits and play the role of connecting or disconnecting circuits.

There are many types of connectors and a wide range of applications. But if you ask what are the main technical parameters of the connector, it is estimated that few people can answer, so we also need to know the main technical parameters of the connector itself.

Security parameters

Insulation resistance refers to the resistance value that occurs when a voltage is applied to the insulating part of the connector to cause leakage current in or on the surface of the insulating part. It is mainly affected by factors such as insulating materials, temperature, humidity, and fouling.

The insulation resistance value provided on the connector sample is generally the index value under standard atmospheric conditions. Under certain environmental conditions, the insulation resistance value will drop to varying degrees. In addition, attention should be paid to the test voltage value of insulation resistance.

Depending on the insulation resistance (MΩ) = voltage (V)/leakage current (μA) applied to the insulator, different voltages will have different results. In the test of the connector, the applied voltage generally has three levels 10V, 100V, and 500V.

security parameters

Withstand voltage

The withstand voltage is the critical voltage that can withstand higher than the rated voltage within a specified time between the mutually insulated parts of the contact pair or between the insulated part and the ground without breakdown.

It is mainly affected by contact pair spacing and creepage distance and geometry, insulator material and ambient temperature and humidity, and atmospheric pressure.


Any connector is inseparable from the current when it is working, and there is a risk of fire. Therefore, the connector is not only required to be able to prevent ignition but also required to be able to self-extinguish in a short time once it is ignited and caught fire.

When selecting, pay attention to the selection of electrical connectors with flame-retardant and self-extinguishing insulating materials.


Mechanical parameters

Single leg separation force and total separation force

The contact pressure in the connector is an important indicator, which directly affects the size of the contact resistance and the wear of the contact pair. In most structures, it is quite difficult to directly measure the contact pressure. Therefore, the contact pressure is often indirectly measured by the single-leg separation force.

For circular pinhole contact pairs, standard pins with specified weights are usually used to test the ability of female contacts to hold weights. Generally, the diameter of the standard pins is -5μm, which is the lower limit of the diameter of male contacts. The total separation force is generally twice the sum of the upper-line separation forces of the individual feet.

When the total separation force exceeds 50N, it is quite difficult to use manual insertion and extraction. Of course, for some test equipment or occasions with special requirements, zero insertion force connectors, automatic fall-off connectors, etc. can be selected.

Environmental Parameters

Environmental parameters mainly include ambient temperature, humidity, sudden temperature changes, atmospheric pressure, and corrosive environment. The environment in which the connector is used, stored, and transported has a significant impact on its performance, so the corresponding connector must be selected according to the actual environmental conditions.

Ambient temperature

The metal material and insulating material of the connector determine the working environment temperature of the connector. The high temperature will destroy the insulating material, causing insulation resistance and voltage resistance to decrease; for metals, high temperature can cause the contact pair to lose elasticity, accelerate oxidation and cause coating deterioration. The usual ambient temperature is -55~100°C, which may be higher on special occasions.

ambient temperature


The relative humidity is greater than 80%, which is the main cause of electrical breakdown. The humid environment causes the absorption and diffusion of water vapor on the surface of the insulator, which can easily reduce the insulation resistance to below the MΩ level.

Long-term exposure to high-humidity environments will cause physical deformation, decomposition, and release of products, resulting in breathing effects, electrolysis, and corrosion. and crack.

Especially for the connectors outside the equipment, it is often necessary to consider the environmental conditions of humidity, water seepage, and pollution. In this case, a sealed connector should be selected. For watertight and dust-tight connectors, the shell protection level of GB4208 is generally used to indicate.

Rapid Temperature Change

The sudden change of humidity test is to simulate the actual use of the connector equipment in a cold environment to a warm environment or to simulate the rapid change of the ambient temperature of a space vehicle or a probe. Rapid temperature changes may crack or delaminate the insulating material.

Atmospheric Pressure

At high altitudes where the air is thin, the plastic emits a gas that pollutes the contact pairs, increases the tendency of corona generation, reduces the withstand voltage performance, and causes short circuit failures in the circuit. When the high altitude reaches a certain value, the performance of the plastic becomes worse. Therefore, when using unsealed connectors at high altitudes, derating must be used.

Corrosive environment

Corrosive Environment

According to the different corrosive environments of the connector, choose the connector with the corresponding metal, plastic, and plating structure, such as the connector used in the salt spray environment, if there is no anti-corrosion metal surface, the performance will deteriorate rapidly.

In an environment containing considerable concentrations of SO2, it is not suitable to use connectors with silver-plated contact pairs. Mold is also a significant problem in hot flash areas.

I hope this article can help customers better understand connectors. For practitioners in the connector industry, some general parameters of connectors should be very familiar. Improving the reliability of the connector is firstly the responsibility of the manufacturer. Only through the joint efforts of both the manufacturer and the user can the function of the connector be maximized.

Zhejiang Lianhe Electronics Co., Ltd. is a professional manufacturer of electronic connectors, automotive connectors, and other products

Welcome new and old customers to come to buy.

Future trends of electronic connector technology

Connectors, as a key component of current or signal connection, are also an important part of industrial systems.

With the rapid development of personal mobile terminals, household smart appliances, the information and communication industry, the new transportation energy industry, aerospace technology, artificial intelligence, medical electronic equipment, and other fields, more and more requirements are put forward for connectors in terms of function, appearance, performance and use environment. high demands.

miniaturization integration

Development trend of miniaturization integration

In order to meet the requirements of portable, digital, and multi-functional electronic machines, as well as the automation of production and assembly, electronic connectors must be adjusted in the product structure. The products are mainly developed in the direction of small size, low height, narrow pitch, multi-function, long life, surface mount, etc.

Miniaturization means that the distance between the centers of electronic connectors (connectors) is smaller, and high density means the realization of a large number of cores.

The miniaturization of consumer electronics requires the combination of miniaturization, thinning, and high performance of components, which also promotes the development of connector products in the direction of miniaturization and small spacing.

The miniaturization of components requires higher technology. All of these require a strong industrial mold-based foundation to effectively support.

Intelligent development trend

Intelligent development trend

Today is a world of rapid information development. No matter what kind of information or technology it is for, people’s requirements are getting higher and higher.

From the rapid development of information and communication data, wireless interconnection has come to each of us, from the application of smartphones, smart wearables, drones, unmanned driving, VR reality, intelligent robots, and other technologies, the addition of IC chips and The intelligent development of electronic connectors that control circuits is an inevitable trend, because it will enable electronic connectors to more intelligently grasp the use of electronic equipment, and improve the performance of the connector itself to achieve intelligent wireless bridging.

High performance development trend

High-performance development trend

High-speed transmission means that modern computers, information technology, and networking technology require the time scale rate of signal transmission to reach the megahertz frequency band, and the pulse time to reach sub-milliseconds, so high-speed transmission electronic connectors (connectors) are required.

The high frequency is to adapt to the development of millimeter wave technology, and the radio frequency coaxial electronic connectors (connectors) have entered the millimeter wave working frequency band.

High current is also an important development direction of many electronic connectors (connectors). Although short, light, energy-saving and low-consumption are the direction of efforts of consumer electronics products, the following two aspects determine that in quite a few applications, the power supply evolves in the direction of high current.

Let us take the common computer CPU as an example to illustrate the reason:

1. The improvement of computer performance requires an increase in CPU operation speed and an increase in the number of transistors required, so power consumption increases. When the voltage remains unchanged, the current rises in the same proportion;

2, With the advancement of semiconductor technology, the operating voltage of transistors Gradual reduction is conducive to reducing power consumption, but its physical characteristics determine that the reduction ratio of power consumption is not as good as that of voltage. Therefore, the increase in current is also an important indicator to test the high-performance development of electronic connectors.

Anti-signal interference and shielding

Anti-signal interference and shielding, when the data transmission speed increases, the influence of capacitance and impedance becomes more and more obvious. A signal on one terminal can crosstalk to an adjacent terminal and affect its signal integrity.

In addition, capacitance to ground reduces the impedance of high-speed signals, attenuating the signal. In the new connector design, each signal transmission terminal is separated from the other.

Differential pairs work well for this purpose because each differential pair has a ground pin on one side to reduce crosstalk. Usually, the first layer is the pinned area to separate adjacent ground terminals.

The next level is the ground shield fitted between the rows. Top-level applications would include a metal ground structure surrounding each signal terminal. Such metal shielding achieves the best combination of data transmission speed and signal integrity.

extreme environments

Resistant to extreme environments, reliability, and environmental protection. In the modern high-tech industry, there are many connectors used under extreme environmental conditions. Electronic connectors can be used effectively and normally under ultra-high temperatures, low temperatures, vibration, hot and humid environments, and corrosive environments.

There are higher requirements in terms of selection, structural design, and processing technology. New high-temperature-resistant materials, new electroplating and coating processes, and alloy materials with higher elasticity make future connectors more adaptable to harsh environments.

The appearance is beautiful and fashionable, and more attention is paid to the development trend of humanization

With the continuous development and progress of multimedia and other technologies, the connector is also adapting to the constant changes of its main body. With the development of science and technology, a good connector should not only have a more beautiful and fashionable appearance, but also a more durable material and more convenient operation.

More importantly, the connection design of its core parts should be More and more refined and precise. In this way, it will not appear that the card slot of the general data connector will become loose after a long time of use. In severe cases, the data transmission part of the connector will be completely paralyzed, which will greatly damage the customer’s confidence in the purchase of the main product.

beautiful and fashionable

Nowadays, the replacement speed of electronic products and equipment is very fast, which makes the future development trend of the connector industry to be miniaturized, integrated, intelligent, high-performance, and user-friendly. Only in this way can we adapt to the development of the times. Zhejiang Lianhe Electronics Co., Ltd. is a company specializing in the production of connectors. Welcome new and old customers to come and buy.