How to choose the right and appropriate industrial connector?

At present, industrial connectors have been widely used in various electrical connections, playing the role of connecting and disconnecting circuits. However, due to the wide application range of industrial connectors, different practical application requirements, various types of industrial connectors and other factors. Therefore, how to choose industrial connectors correctly is very important, and choosing the right industrial connectors is also an important aspect to improve the reliability of connectors.

1. How to choose the correct and appropriate industrial connector? ：

First of all, we need to understand the composition of industrial connectors, as follows:

Below, we comprehensively explain how to correctly select industrial connectors from the aspects of electrical parameters, safety parameters, mechanical parameters, environmental parameters and pin connection methods of industrial connectors. 1. Electrical parameters • Rated voltage Rated voltage, also known as working voltage, mainly depends on the insulating material used in the connector and the spacing between pins. Under normal circumstances, the connector can work normally below the rated voltage. Common rated voltage ranges for industrial connectors are: 110V-4000V, 5V-48V and below 5V. • Rated current Rated current is also called working current. Like the rated voltage, the connector can generally work normally when the rated current is lower than the rated current. During the use of the connector, when current flows through the pin, the pin will heat up due to the conductor resistance and contact resistance. Therefore, there is a certain relationship between the rated current data and the ambient temperature. When designing and using, it is necessary to consider the value of the rated current at the ambient temperature, such as the relationship between the ambient temperature and the rated current of the HARTING Han D ferrule below:

• Contact resistance Contact resistance refers to the resistance generated by two contact conductors at the contact part. The contact resistance of HARTING's commonly used Han D pin is ≤ 3 mΩ, the contact resistance of Han E pin is ≤ 1 mΩ, and the contact resistance of Han C pin is ≤ 1 mΩ. • Shielding performance In modern industrial electrical equipment, strict requirements are put forward for electromagnetic interference. Therefore, each individual connector is often enclosed with a metal shell to prevent internal electromagnetic radiation from overflowing or being interfered by external electromagnetic fields. At this time, there are certain regulations on the electrical continuity of the metal casing, that is, the shielding property of the casing. At present, HARTING industrial connector housing HPR series and EMC series can achieve high-performance shielding performance requirements.

2. Safety parameters • Insulation resistance Insulation resistance refers to the resistance value caused by applying a voltage to the insulating part of the connector, thereby causing leakage current in or on the surface of the insulating part. It is mainly related to insulation materials, temperature, humidity, fouling level and other factors. The insulation resistance values provided on connector samples are generally index values under standard atmospheric conditions. The insulation resistance of most ferrules of HARTING industrial connectors is> 10 ^ 10. • Withstand voltage Withstand voltage is the critical voltage that can be withstood between the mutually insulated parts of the contact pair or between the insulated parts and the ground within a specified time that is higher than the rated voltage without causing breakdown. It is mainly affected by contact pair spacing and creepage distance and geometry, insulator material, ambient temperature and humidity, atmospheric pressure, etc. The comparison relationship between the impulse voltage and the withstand voltage value is shown in the table below, and the relevant electrical parameters of each ferrule have been clearly given in the sample as follows:

• Fire-resistant performance Industrial connectors are inseparable from current when working, and the connectors will heat up during use. Therefore, the fire protection performance of connectors is crucial to the safety of connectors and even the entire industrial application. HARTING industrial connectors meet the fire protection requirements such as EN45545 and UL94 V0. 3. Mechanical parameters • Mechanical life The mechanical life of connectors refers to the plugging and unplugging life. Usually, the mechanical life of HARTING industrial connectors is 500 to 10,000 times. At present, the mechanical life of HARTING standard industrial connectors is 500 times, and the connectors of HMC high plug-in series can reach up to 10,000 times. • The number of needle positions of the ferrule can be selected according to the design and usage requirements. At the same time, the volume of the connector and the total separation force must be considered. Generally speaking, the greater the number of pins, the larger the volume of the ferrule and the relatively larger the total separation force. At the same time, the connector base is generally equipped with a jack when in use, because the live contact of the socket equipped with the jack is built into the insulator, and it is difficult for the human body to touch the live jack, thus preventing the occurrence of electric shock accidents.

• Connection method of connector housing Connectors generally consist of a plug and a base. The plug is also called a free end (wire end) connector, and the base is also called a fixed connector. The connection and disconnection of circuits are realized by inserting and separating plugs and sockets, so various connection modes of connector housings are produced. At present, Harting's commonly used connection methods include handle connection, button connection, screw locking, bolt connection, circular thread tightening, etc. · Overall dimensions of connectors Currently, the overall dimensions of industrial connectors commonly used by HARTING are 3A, 10A, 16A, 6B, 10B, 16B, 24B, 34B and 48B, etc. When choosing and using, you need to select the appropriate size of connectors according to the installation space, equipment size and corresponding electrical parameters. · Industry requirements Industrial connectors can be applied to all walks of life, and each industry has various industry standards for connector requirements. For example, the railway industry needs to meet the railway vibration impact standard IEC61373 depending on where the connector is used.

4. Environmental parameters · Ambient temperature The metal materials and insulation materials of the connector determine the working ambient temperature of the connector. At present, the temperature range of industrial connectors commonly used by HARTING is-40 °C ~ + 125 °C. · Contamination rating Any contamination may create electrical conductivity and, together with moisture, may affect the insulating properties of the surface on which it is deposited. The degree of contamination affects the component design in terms of creepage distance. The degree of contamination is defined for exposed, unprotected insulation. HARTING industrial connectors are designed to be used at a higher contamination level of 3. IP protection level IP protection level is the waterproof and dustproof requirement of connector shell, and it is an important parameter of connector performance index. The level of IP protection directly determines the use environment and application performance of connector. HARTING's industrial connectors have IP protection levels of IP65, IP67, IP68 and IP69K when using housings.

5. Pin connection method Pins are divided into gold pins and silver pins according to different materials and surface treatments. According to actual experience, it is recommended to choose gold pins when the rated current is ≤ 5 mA and the rated voltage is ≤ 5 V. In other cases, silver pins can be considered. Under normal circumstances, gold needles can be used instead of silver needles, but it is not recommended to use silver needles instead of gold needles.

Crimping Crimping is a technique of connecting cables and pins together in order to compress the metal into regular deformation within specified limits. It can obtain better mechanical strength and electrical properties, and it can withstand harsher environments and stringent use requirements. But crimp tool or large crimp equipment need to be purchased separately. · Cage shrapnel connection enables quick connection and does not require special crimping or installation tools. Just need to use a flat screwdriver. · Screw connection Screw connection is a connection method using screw terminal blocks. Pay attention to the larger and minimum cross sections allowed for connecting wires (0.2 mm ² ~ 16 mm ²) and the larger tightening torque allowed for screws of different sizes.

1-Crimp connection 2-Cage shrapnel connection 3-Screw connection · ES Press connection can achieve quick connection, no tools are needed for assembly, just push the blue buckle to achieve connection, and only need to use a flat screwdriver for disassembly. · Quick Lock connection enables quick connection and does not require special crimping or installation tools. Just need to use a flat screwdriver. · Axial connection requires the use of a torque hexagonal wrench for connection, no other special tools are required, and the wire diameter range used is 1.5 mm ² ~ 185 mm ².

4-ES Press Connection 5-Quick Lock Connection 6-Axial Connection The above discusses the selection method of industrial connectors from the aspects of electrical parameters, safety parameters, mechanical parameters, environmental parameters and pin connection methods, but when selecting industrial connectors In the process, various factors are not independent and often interact with each other. Therefore, we must comprehensively consider the connector selection process, and we need to choose the most suitable industrial connector solution based on actual use and design requirements.

---------------------------------------------------------------------------------------------------

3. Brief description of Shimao Electronic Products Network Company and its products sold:

World Trade Electronic Products Network is a professional, accurate and vertical comprehensive product sales platform for the electronic industry focusing on the supply, demand and sales of connector wiring harness and cable products! Specializing in the production/sales of {Connector Harness Cable Products}; If you want to buy or know which connector harness cable product solutions we can provide, please contact us through the following methods.