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The necessity of salt spray testing for wiring harness connectors

Whether for harness accessories such as connectors, terminals, buckles, or harness assemblies, DV testing cannot bypass salt spray testing.

When a car or truck is walking, the location of the wire harness connector may come into contact with water splashing on the tires, especially after snow in the northern winter, when salt is used to speed up the melting of snow on the road. These connectors usually require salt spray testing to verify corrosion resistance.

The standard for wire harness salt spray test validation is to check the reliability of contact resistance, not the appearance. These connectors are often used with sealing rings to improve salt spray resistance.

Connector terminal tinning product salt spray test

Many enterprises use salt spray for incoming inspection of connector terminal tinned products, and to monitor their appearance.

The connectors tested may not be exposed to salt or Marine environments at all, and the products are likely to be installed in a protected environment where the use of salt spray testing does not demonstrate consistency with the actual application.

There is a layer of oxide film on the surface of tin plating products, and the main failure mechanism is fretting corrosion after coordination. In this case, the salt spray test has no relationship with its failure mechanism.

Even if the oxide layer on the surface turns black after the salt spray test, in practical use, the matching terminal can easily remove the oxide layer and contact the pure tin inside to form a gold connection.

Salt spray tests have no acceleration factor, and salt spray past 48 hours is not indicative of how many years the product will last under certain conditions.

Environmental reliability testing equipment is widely used in the level from raw materials, components, to the level of a circuit board/module, water heater products such as electronics, electrical appliances, power of constant temperature, constant humidity and temperature changes.

It also applies to salt fog test, the mixed gas test, ozone ageing test, UV ultraviolet accelerated ageing test, lamp ageing test, sulfur dioxide corrosion test, high Air low-pressure test, IPX1 ~ 8 waterproof rank test, dust/sand dust test, drop test, combustion test, a half-sine wave/trapezoidal acceleration shock test, sine/random vibration test, collision simulation test, drop test, the tensile strength test, fatigue test, the test and highly accelerated life test screening machinery, mechanical stress and environment, climate environmental testing and the integrated environment Pilot project.

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WHY DO TERMINALS OF ELECTRONIC CONNECTORS NEED PLATING

We know that terminal connectors are indispensable for conducting current or signals in equipment, so why use electroplating process for terminals of electronic connectors? LHE connector tell you why the wiring terminal should be electroplated?

1, anti-corrosion, anti-oxidation such as nickel plating, chromium, zinc, etc.

we usually terminal materials for copper, iron, etc., easy to oxidize in the air, electroplating a layer of metal with strong oxidation resistance can improve the corrosion resistance of terminal, but also to ensure the performance of current, signal transmission.

2, enhance the conductivity such as gold, silver, etc.

 in the original material such as iron, phosphorous copper conductivity is usually below 20%, for the low impedance requirements of the connector can not meet the requirements of the time, need n to be in the surface electroplating and other high conductivity metal can reduce its impedance

 3, enhance electroplating adhesion (such as copper plating)for poor adhesion of metal, usually before electroplating copper bottom to enhance adhesion

4, improve solder (such as gold, tin, etc.)

Due to the poor adhesion of the original material to tin, the surface of a certain thickness of tin and other materials can improve the welding resistance of parts.

  5, beautiful, such as gold, silver, town, etc.)

after the electron microscope terminal metal is usually more shiny and bright appearance than the material, it looks more beautiful

 If you need electronic connectors, please contact us through LHE official website （www.lhecn.com���for more details.

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FOUR WAYS TO CONNECT A CONNECTOR PIN

Pin jack is a kind of positioning joint connecting electronic circuit, which is composed of plug-in and connector, namely, we usually say pin and jack. In general, the pin and the jack can be completely separated. But the connection is stable when needed, so a pin jack can also be called a connector. A connector pin is a needle-like plug on a connector.

LHE official website (W www.lhecn.com) has various types of connector spot, stable and durable, a variety of specifications of connector pins, suitable for all kinds of environment. Fast delivery, secure purchase,welcome to LHE

The stable connection of pin jack is the basic requirement of the connector. However, there are a variety of connection methods, which are widely used including four kinds – lifting connection, bayonet connection, plug and pull connection, cabinet connection. The name gives you a sense of how the various connections are represented in the connector structure

1、threaded connection

The threaded connection is a threaded or explosive bolt structure. This kind of structural connection is more stable, but the loading and unloading efficiency is low.

2、Bayonet connection

Bayonet connection can see the obvious concave and convex groove on the connector, this structure can be fast loading and unloading, prevent misinsertion. But the production accuracy is high.

3、Plug and unplug connection

Plug and pull the connection is very simple, is the vertical friction between the pin and the jack bite each other, the separation is also linear movement, do not need to rotate, plug and pull convenient, widely used.

4、Connect cabinets

The structure is complex, and it is mostly used for electrical connectors on devices that are close to the frame and need to be connected blindly. It can make the electrical equipment lighter, smaller, easier to maintain and more reliable.

 LHE connector variety, excellent quality, short delivery time, fast delivery, choose LHE, choose good quality.

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CONNECTOR IN THE FORM OF INDUSTRIAL CONNECTION

In industry, there are many forms of connector connection, the following several are more commonly used

1、Plug and unplug connection:

It is a versatile form of connection. When the plug and socket of the electrical connector are connected and separated, the direction of movement is usually reciprocating linear movement, without torsion and rotation, and only a small working space can be completed. Common plug and pull connection has ball or pin two structures. The connection form because there is no mechanical labor-saving mechanism, once misinserted, mechanical resistance increases significantly, can be found in time.

2、Cabinet connection mode:

Electrical connectors are used on certain devices that require blind connection near the frame to make electrical equipment lighter, smaller, easier to maintain and more reliable. This type of connection makes it impossible for the operator to feel the connection, so an accurate positioning device must be designed to avoid forcing the misplugged electrical connectors together, making it impossible to misplug. Cabinet electrical connectors usually use a floating or flexible contact design to ensure correct connection.

3、Thread connection:

A type of connection often used for electrical connectors with larger contacts and in strong vibration environments. This type of connection can be installed after the completion of the connection to prevent loose fuse. The connection is reliable but slow. .

4、Bayonet connection mode:

It is a reliable and fast form of connection and separation. Most electrical connectors in the form of card 121 connections have an intuitive display of proper connection and locking, which can be viewed through a small hole on the side of the electrical connector connection nut.

Zhejiang Lianhe electronics Co., Ltd. is a professional engaged in terminal line, injection molding line, wire harness row needle row disc connector, Jane cattle connector, IDC connector, FPC connector and other manufacturers, our company’s official website:www.lhecn.com, any demand or questions, welcome to contact us at any time

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BASIC KNOWLEDGE OF PH2.0 CONNECTORS

Ph2.0 connector we also call line to board connector one of them, Ph2.0 connector is imitation of Japanese IST connector manufacturers to develop a replacement connector, Ph2.0 connector connection has two types.

Ph2.0 connector our company also known as A2001 connector, it is mainly composed of plastic shell, needle seat, terminal three categories, plastic shell The needle seat is divided into single and double rows, the connector mode is straight insert, bend insert, stick H these three, and another is to belong to the air connection, the main structure is composed of male and female plastic shell and male and female terminal combination together, the general company will adopt a single supporting way, such as: male glue plate end, female glue A with male terminal and so on.

Ph2.0 connector has buckle and no buckle points, its plastic material has been able to achieve a very high fire rating, the use of phosphor bronze material, tin plated surface, needle holder high temperature up to 260 degrees, widely used in household appliances, intelligent equipment.

Zhejiang Lianhe electronics Co., Ltd. is specialized in ph2.0 connector replacement manufacturers, but also the production of titanium row connector, jian Sheng sheng Angle connector,IDC, etc. our company’s official website: www.lhecn.com, any demand or questions, welcome to contact us at any time

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What are the reasons for superior quality of terminal line

The terminal line is essential and a key element in modern electronic systems.It can realize the integrated operation of related electronic systems and the realization of related functions.

Throughout the market, the good sales brands of terminal line , are all good products with good quality control. Some focus on high service quality terminal line brands also rely on perfect service to get a lot of praise. Here’s why the quality of terminal lines is so outstanding.

Enough manufacturing experience

For such high precision components as terminal lines, it is necessary to have enough rich experience as a backing. Rich experience in technology research and development and first-line manufacturing enable its team to know how to control the quality level, which is also the key to constantly meet the new requirements of customers in terms of quality.

1、 Various technical cooperation of high quality

At the same time, the technical suppliers and various technical cooperation channels, which is behind the recognized terminal line products are also the key reason. The careful cooperation in the technical level and product requirements can be verified in many aspects. Of course, this is also the terminal line products can be qualified for a variety of applications in the quality of the key task.

2、 Brand owner has a goods quality control consciousness

In addition, the responsibility of the terminal line brand owners and the awareness of technical research are also the key reason. Their quality awareness and responsible attitude to customers to ensure the product quality level. Working with this type of terminal brand, the quality feedback has been excellent.

The high quality of the terminal line is the premise that it is reliable enough in many aspects. Such good quality benefits from the rich experience of the brand owner in related product development manufacturing.

as well as its application in technical and customer relations of cooperation and cooperation in many ways the results, terminal products of high quality level, of course, also with brands Production and manufacturing of rigorous quality assurance consciousness is inseparable

It has a wide range of cooperation relationship and cooperation achievement  in technology level and customer applications. The high quality level of terminal line product is also closely related to the brand owner’s strict quality awareness in manufacturing.

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Three types of connectors

The general connectors can be divided into three types, such as wire-to-board, board-to-board and wire-to-wire. Let's take a look at their differences and applications.

1、 Wire-to-board Connectors

It’s a connector that connected wires and circuit board, which main function is to transmit power and signal. The wire-to-board connector is arguably the ancestor of all connectors. Depending on the use and requirements, there are numerous types of line-to-board. But in the information industry, it is mostly based on the distance of the pin as well the transmission of current and voltage to distinguish.

The main applications of wire-to-board connectors include commercial electronic equipment, household appliances and other general industrial and commercial areas using auxiliary circuits.

2、 Board-to-board Connectors

At present the board-to-board connector has the strongest transmission capacity among all connector products. The main spacing of the board to board connector is 0.4mm, 0.5mm, 0.635mm, 0.8mm, 1.00m and 1.27mm.

Board-to-board connectors are mainly used in electrical power system, communication network, financial manufacturing, industrial automation, medical facility, office equipment, intelligent household electrical appliance, military industry manufacture and other industries.

3、 Wire-to wire Connectors

It includes two forms of wire-to-cable or cable-to-cable, the defining feature is two single-thread individual or a permanent connection between the corresponding leads of the two cables. This type of permanent connection is common in fixed-connection of wire-to wire connections and IDC connections. 

Wire-to-wire connectors are mainly used in automotive, communications, consumer electronics, data processing, industrial machinery and other fields.

Welcome to contact with Zhejiang Lianhe electronics Co., LTD., if you want to purchase these three kinds of connectors. We have more than 10 years experience of production, mature production line, good product quality, welcome to visit our official website (www.lhecn.com)

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Types of common terminal

Wiring terminal has various types and modes, among them, common types of terminals are as follows.

1、The wiring terminal of plug and pull type

The product is connected by two parts. One part of the wire is pressed down and then inserted into the  other part, which is then welded to the PCB board. The mechanical principle of the bottom connection and the anti-vibration design ensure the long term airtight connection and the reliability of the finished product.

    2、The wiring terminal of fence type

The fence type terminal can realize safe, reliable and effective connection, especially in high current, high voltage is widely used.

3、 The wiring terminal of spring type

The wiring terminal of spring means a new type of terminal, which using spring device, has been widely used in the world of electrical and electronic engineering industry, such as lighting, elevator control, instrumentation, power supply, chemistry and automotive power.

4、 The wiring terminal of rail type

The wiring terminal of rail type adopts the design of pressing line and unique thread self-locking. It makes the wiring connection reliable and safe. The series of wiring terminal appearance is beautiful and generous, can be equipped with a variety of accessories, such as short circuit piece, identification bar, baffle, etc

5、 The wiring terminal of through-the-wall type

    The wiring terminal of through-the-wall type uses screw connecting wire technology, the insulation material is PA66 (flame retardant grade: UL94,V-0), and the connector adopts superior highly conductive metal material.

Zhejiang Lianhe electronic Co.,Ltd. is a professional manufacturer of electronic connector, has more than 10 years experience of production technology and process. It has good quality product, complete production equipment. Need terminals and other connectors, welcome to contact us.

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What is the important role of the plug board connector in electronic device

In recent years, the emergence of a variety of hand-held electronic devices has brought great convenience to people’s life, it also provides more entertainment.

Seemingly insignificant plug board connector actually plays an important role in small electronic devices. 

So the plug board connector with advanced technology and excellent quality play what irreplaceable vital role in electronic equipment?

1、 An acting electron in a connected circui

Electronic equipment can not be used without the help of current, and the plug board connector with quality assurance means the circuit, which connect various components of the electronic equipment. It helps the electronic equipment to carry the current between different parts.

With the efficient and stable current transmission through the plug board connector, so that electronic devices can play a more important role, and bring people a more pleasant leisure learning time.

2、 The function of performance stability

The plug board connector can not only help electronic equipment parts to carry out current transmission, but also play a good role in the stability of current output.

 At present, many electronic components have very strict limits on the connected current. Too much or too little current may cause damage to these precision electronic components. Therefore, superior plug board connectors can not only ensure the stability of current, but also to stabilize the performance of electronic equipment.

3、 The role of improving quality

Any electronic products need current to provide power, and the power of the current will have a different impact on the quality of electronic equipment. 

At present, in order to improve the product’s quality, many high-tech electronic device manufacturers will try to choose products, which has stable current and reliable quality when choosing plug board connector. To improve the quality of electronic devices with the help of these premium plug board connector.

Today, plug board connector has a very important role in a variety of electronic device,which is mainly used for micro low current circuit connections. It can help the various components connected in the electronic equipment to connect the circuit.

Meanwhile, it also improve the quality of electronic devices by making them more stable and reliable during operation. All of these are the effects of superior quality and reliable plug board connectors in electronic equipment.

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Wire connectors terminals when using on the device

When the “ wire connectors terminals ” is exposed or wetted by water, it may cause poor insulation between circuits. If condensation may form or get wet, take appropriate anti-dripping measures.

The production of “wire connector terminals” is not premised on being disassembled in a live circuit. Therefore, do not disassemble the “terminal/board connector” while the power is on. Or cause poor performance. It may cause poor insulation between circuits.

If condensation or water is allowed to get wet, the “wire connector terminal” is exposed or wetted by water. Please take appropriate anti-drip measures.

Do not power the current above the rated value into multiple circuits. Even if the current of one circuit is set to not exceed the rated value after calculation, the “wire connector terminal” is used. In addition, even if the conductive path or the contact resistance is unbalanced, it is impossible to distribute an equal current to each circuit, and the performance aging is accelerated due to energization of a rated value or more, and an abnormality is caused.

When the “connector” is used, the connector connector (connecting portion) always operates in the vicinity of the wire, the resonance of the printed wiring board, or the rotating structure of the device and the movable portion. Poor contact may result from sliding wear of the contact portion.

Therefore, take measures such as fixing wires in the fixture and supporting the printed circuit board on the printed circuit board to suppress resonance. The terminal may be broken or cracked (stress corrosion cracking) due to “corrosive gas such as ammonia or sulfur” (stress corrosion cracking), and the connector may be poorly contacted. The terminal, the connector, and the place where the device is used may be subjected to the above. When “corrosive gas such as ammonia or sulfur” is affected, “wire connector terminal” “terminal information is brass”. Please use the “terminal information for copper alloy materials other than brass (phosphor bronze materials, etc.)”. For product details, please contact us.

Poor contact of the connector may occur due to deformation or adhesion of foreign matter to the connector connector. It is therefore important to note that if the connector is soldered to the printed circuit board, the printed circuit board is stacked. Do not stack printed circuit boards that are soldered.

Precautions for wire connection processing such as wire harness processing When the “terminal/continuous wire connector terminal” manufactured by our company is combined with a wire (pressing or crimping), the wire bonding processing and other precautions for wire connection processing will be produced by the company. When the “terminal/continuous wire connector terminal” is combined with the wire (pressing or crimping, etc.). Please use the tools specified by the company. If you use a non-designated tool to connect, it may result in poor contact or disconnection.

Please perform wire harness processing after confirming the processing conditions and so on. Also. It may cause poor contact. Therefore, please confirm the management points before processing. If the applicable wire is connected to the “wire connector terminal” wire such as the crimping height, important management points are poorly managed. Need to confirm. When the terminal and the connector are separately specified, the wire suitable for crimping the connector crimping connector is in principle the use of a non-plated wire, a single wire, a tin coated wire and a shielded wire for the tinned soft copper stranded wire. The specified wire should be used. In addition, use the wire confirmed by our company for the wire used for crimping the connector.

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Introduction to pin header connector

Pin header connector, a type of connector, English name: Pin Header.

This connector is widely used in PCB circuit boards in electronics, electrical appliances, and meters. Its role is to serve as a bridge between blocked or isolated circuits in the circuit, and carry the current or signal transmission task. It is usually used in combination with a female header to form a board-to-board connection; or used with an electronic harness terminal to form a board-to-wire connection; it can also be used independently for board-to-board connection.

Since the specifications required by different products are not the same, there are also various types of pin headers, which are classified according to the pin connector standards of the electronics industry:

According to the pitch, it can be divided into 2.54mm, 2.00mm, 1.27mm, 1.00mm, and 0.8mm. There are single-row, double-row, and three-row pins according to the number of rows. / Stand-up), plug-in DIP (Straight Plug / Bent Plug), etc .; divided according to the installation method: 180 ° is represented by S, 90 ° is represented by W, and SMT is represented by T.

Board-to-board connector

Number of rows: single, double, three, four, up to four.

Number of needles: 02 to 80

Pins: straight, bent, SMT; pin size.

Dimensions: overall dimensions length, width, thickness, spacing.

Pitch: There are 0.8, 1.0, 1.27, 2.0, 2.54 pitches.

Material: refers to the contact material and surface treatment, insulator material.

Packaging: blister pack, roll bag, bulk.

Material: Pin material: Brass or phosphor bronze; Insulator material: Plastic UL94V-0.

Surface treatment: gold plating 0.8μ, tin plating, nickel plating.

Processing technology: The pin processing technology process is mainly as follows: firstly use brass (or phosphor bronze) to process the pins,

According to the requirements, first nickel plating and then gold plating, then use the mold to process the insulator part, and finally measure the ruler on the special equipment.

Inch requires inserting pins into the insulator.

Remarks: There are many factors that affect the price, usually the most affected are gold plating and needle length.

Pin Hearder parameters example

Features: single and double rows, straight and curved needles with 2.54mm and 3.96mm pin pitch, various stitch lengths

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Specifically, what is the role of the waterproof electrical connectors?

There are many types of connectors, and the effect is different. Especially for some special occasions, you need to use waterproof connectors. Why use waterproof electrical connectors? What kind of function does this waterproof connector need to use? The following small series will give you a detailed introduction:

The role of waterproof connector: 1) Avoid spraying water intrusion Rainproof or it can avoid damage caused by water sprayed in the direction of vertical angle less than 60 degrees. 2) Avoid splashing water intrusion Avoid water splashing in all directions and invading the appliance and causing damage 3) Avoid jetting water intrusion Avoid intrusion of water from nozzles in all directions into the appliance and cause damage 4) Avoid large waves Electrical appliances installed on the deck to avoid damage caused by large waves 5) Avoid water intrusion when immersed in water The appliance is immersed in water for a certain period of time or the water pressure is below a certain standard to ensure that it will not be damaged by water immersion. 6) Avoid water intrusion when sinking The appliance is sunk indefinitely under the specified water pressure to ensure that it is not damaged by water immersion.

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What materials are used in general waterproof electrical connectors?

There are many manufacturers of waterproof electrical connectors on the market. Most of the materials used are basically the same, but the material density is only a part of the material density. Some materials are also used. The quality of the materials is determined by the quality of the products. Life, safety and environmental performance, let me lead you to understand the standard materials commonly used in the production of waterproof connectors and its advantages!

The first type: shell material Nylon (English name Polyamide (PA): currently divided into two types of "nylon 6 and nylon 66" is a thermoplastic resin containing a repeating amide group - [NHCO] in the main chain of the molecule. Advantages: heat resistance, low friction coefficient, abrasion resistance, self-lubricating, shock absorption and sound absorbing, oil resistance, weak acid resistance, alkali resistance and general solvent, good electrical insulation, self-extinguishing, non-toxic, odorless, Good weather resistance. PVC: chemical name polyvinyl chloride Advantages: resistance to folding, light, water, oxidation Second: hardware material Copper plated gold: Advantages: ensure that the copper surface does not fall off

Third: O-type waterproof ring Rubber: a double insulated wire Advantages: good elasticity, cold resistance, high temperature resistance, oil resistance, UV resistance, good flexibility and high strength Fourth: sealing gasket Silica gel: can be divided into two major categories: organic silica gel and inorganic silica gel Advantages: heat resistance, cold resistance, dielectric properties, ozone resistance and weather resistance

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Waterproof electrical connectors technology for vehicles

1. The waterproof electrical connectors has precise technical performance, and it is precisely processed from design, process and quality control. The first is the use of high-precision processing equipment for its special processing of molds, the selection of experienced production personnel and advanced equipment technology to achieve high-quality product manufacturing. 

2, the product's advantages and competitiveness to a certain extent depends on the level of technology, the need to constantly improve and improve the production and processing technology, which allows the connector to improve its manufacturing efficiency and quality assurance capabilities. From the fine and rigorous manufacturing process, we will optimize the products in terms of pitch reduction and thin thickness to ensure that the products reach the advanced level in super fine.

3, waterproof connector uses low temperature and low pressure molding technology to utilize the sealing and physical chemistry of hot melt raw materials, to achieve good insulation and high temperature resistance, and to ensure that the solder joints are not pulled by external force after the sealing device At the same time, the contact points of the connector body and the wire have impact resistance characteristics, which effectively ensure the reliability, stability and long service life of the product. There are hundreds of types of waterproof connectors used in general cars. There are hundreds of connectors required for a single model. As people demand safety, environmental protection, intelligence, and economy. The higher the rate, the increasing use of automotive electronic devices, and the number and scope of actual applications will gradually increase.

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Car waterproof electrical connectors structure

The waterproof electrical connectors for the vehicle is a connection component that is frequently contacted by professional technicians, and its function is mainly to shield the circuit from being blocked or isolated in the circuit, so that the current can be completely and smoothly formed in the circuit. Implement the predetermined function. The waterproof connector is available in a variety of sizes and configurations. It is generally made up of four basic structural components, which are contact parts, housings, insulation parts and other accessories.

The four basic structural components of the vehicle waterproof connector are described in detail as follows: 1. The contact component is a component that is used to complete the function of the energization connection. Generally, the contact parts of the positive and negative contact parts are used to form a contact butt joint, and the electrical connection is completed by the contact piece insertion action of two different parameter uses respectively. The positive is representative of the rigidity, and its specific shape can be divided into a cylinder, a square column, and a flat shape. The material selected for the production is made of brass or bronze. Negative is a relatively critical part representing the jack. It is based on the deformation of the elastic structure and the rigid insertion to create a tight connection with the rigid contact parts.

2. The housing of the waterproof connector is the outer cover part. It is internally provided with an insulation mounting module and a mechanical protection device, which enables the plug and the socket to be smoothly and accurately connected so that the connector is fixed to the use device. 3. The insulating part is also the bottom base or the mounting plate. Its function is to arrange the contact parts according to the specified position and spacing, and to ensure that the insulation properties between the contact parts and between the outer casings are kept good at all times because of good insulation. Resistance and withstand voltage performance are the basic technical requirements for the use of insulating materials. 4. Other accessories represent many small and small parts inside the waterproof connector structure, such as screws, nuts, seals, locating pins, connecting rings and spring rings.

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Waterproof electrical connectors performance test

In order to test the performance of the waterproof electrical connectors, we have developed the following performance test methods, mainly from the aspects of electrical strength, insulation resistance, waterproof performance and so on. Electric strength: In the normal working environment, the test voltage between the conductor and the insulator should be as high as no flying or flying fox and the leakage current should be less than 2 amps. Insulation resistance: The resistance at room temperature is greater than 1000 ohms. Contact resistance: The contact resistance under normal conditions is less than 10 ohms. Salt spray test: After 48 hours of neutral salt spray test at a temperature of 35 ± 2 ° C, no corrosion affecting performance can occur. Waterproof performance: immersed in water for half an hour, no water ingress indicates good waterproof performance.

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Waterproof electrical connectors performance standard

The currently manufactured waterproof electrical connectors has two identification feature numbers. What is known is the strength of the protection. First, starting from the first digital identification, the number from 0 to 6.0 indicates no protection, not to mention here. The degree of protection of 1 prevents objects larger than 50 mm from entering. The degree of protection of 2 prevents objects larger than 12 mm from entering. The degree of protection of 3 prevents objects larger than 2.5 mm from entering. The degree of protection of 4 prevents objects larger than 1 mm from entering. The degree of protection of 5 prevents the incoming dust from affecting the appliance. The degree of protection of 6 is completely protected against dust ingress. The second indicator feature number is from 0 to 8, starting with 0 and there is no protection function.

The degree of protection of 1 prevents water droplets dripping from the vertical direction from affecting the appliance. The degree of protection of 2 prevents immersion of water droplets inclined at 15 degrees. The degree of protection of 3 prevents damage from intrusion of water sprayed from vertical <60 directions. The degree of protection of 4 prevents splashing water from entering. The degree of protection of 5 prevents the sprayed water from immersing in the appliance. The degree of protection of 6 prevents the infiltration of large waves of water. The degree of protection of 7 prevents the performance of the appliance from being affected when immersed in water. The degree of protection of 8 can completely sink the connector in the water and the appliance is not affected. Waterproof connectors used in various industries have different protection properties and can be purchased as needed.