Connectors are also called connectors. Domestic also known as joints and sockets, generally refers to electrical connectors. That is, a device that connects two active devices to transmit current or signals. Brands of connectors include Kaname, Nutrex, Toshiba, Molex and so on.

Benefits of Connector Splices

1, improve the production process connectors simplify the assembly process of electronic products. Also simplifies the mass production process.

2, Easy maintenance If an electronic component fails, it can be quickly replaced with a connector.

3.Easy to upgrade with technological advances, the installation of connectors can be updated with new components, replacing old ones with new, improved ones.

4.Increased Design FlexibilityThe use of connectors gives engineers greater flexibility when designing and integrating new products, as well as when composing systems from meta-components.

Basic properties of connector connectors

The basic properties of connectors can be divided into three main categories: namely, mechanical properties, electrical properties and environmental properties. Another important mechanical properties is the mechanical life of the connector. Mechanical life is actually a durability (durability) indicators, in the national standard GB5095 called it mechanical operation. It is an insertion and a pull out for a cycle, in order to specify the insertion and removal cycle after the connector can normally complete its connection function (such as contact resistance value) as the basis for judgment!

1. Mechanical properties of the connection function, insertion and extraction force is an important mechanical properties. Insertion force is divided into insertion force and pull-out force (pull-out force is also known as separation force), the requirements of the two are different. In the relevant standards have the maximum insertion force and the minimum separation force provisions, which indicates that, from the point of view of the use, the insertion force to be small (thus having a low insertion force LIF and no insertion force ZIF structure), while the separation force is too small, it will affect the reliability of the contact. The insertion and extraction force and mechanical life of the connector are related to the structure of the contact parts (size of the positive pressure) the quality of the plating on the contact parts (sliding friction coefficient) and the dimensional accuracy of the arrangement of the contact parts (degree of alignment).

2. Electrical PropertiesThe main electrical properties of connectors include contact resistance, insulation resistance, and electrical strength.

①.Contact resistance A high quality electrical connector should have a low and stable contact resistance. The contact resistance of connectors varies from a few milliohms to tens of milliohms.

②.Insulation resistance is a measure of the insulation between the contact parts of the electrical connector and between the contact parts and the shell, the order of magnitude of hundreds of megohms to thousands of megohms.

③.Resistance, or withstand voltage, dielectric withstand voltage, is to characterize the connector between the contact parts or between the contact parts and the shell to withstand the rated test voltage.

④.Other electrical properties. EMI leakage attenuation is the evaluation of the connector EMI shielding effect, EMI leakage attenuation is the evaluation of the connector EMI shielding effect, generally in the 100MHz ~ 10GHz frequency range test. For RF coaxial connectors, there are characteristic impedance, insertion loss, reflection coefficient, voltage standing wave ratio (VSWR) and other electrical indicators. Due to the development of digital technology, in order to connect and transmit high-speed digital pulse signals, there is a new class of connectors that high-speed signal connectors, accordingly, in terms of electrical performance, in addition to the characteristic impedance, there are also some new electrical indicators, such as crosstalk (crosstalk), transmission delay (delay), time lag (skew) and so on.

3.Common environmental properties include resistance to temperature, humidity, salt spray, vibration and shock.

①.Temperature resistance Currently the maximum operating temperature of the connector is 200 ℃ (except for a few high-temperature special connectors), the lowest temperature is -65 ℃. As the connector works, the current in the contact point at the heat generated, resulting in temperature rise, so it is generally believed that the operating temperature should be equal to the ambient temperature and the temperature rise of the contact point and the sum. In some specifications, it is specified that the connector in the rated operating current under the maximum allowable temperature rise.

②.Resistant to moisture moisture intrusion will affect the connection h insulation properties, and corrosion of metal parts. Constant humidity and heat test conditions for the relative humidity of 90% ~ 95% (according to product specifications, up to 98%), the temperature +40 ± 20 ℃, the test time according to product regulations, at least 96 hours. Alternating humidity and heat test is more severe.

③.Salt spray resistant connectors work in an environment containing moisture and salt, its metal structural parts, contact parts surface treatment layer may produce galvanic corrosion, affecting the physical and electrical properties of the connector. In order to evaluate the ability of electrical connectors to withstand this environment, the salt spray test is prescribed. It is the connector suspended in a temperature-controlled test chamber, with a specified concentration of sodium chloride solution sprayed with compressed air, the formation of salt spray atmosphere, the exposure time specified by the product specification, at least 48 hours.

④.Dynamic and shock resistance to vibration and shock is an important performance of the electrical connector, in special application environments such as aviation and aerospace, railroads and road transportation is particularly important, it is to test the mechanical structure of the electrical connector and the robustness of the electrical contact reliability of the important indicators. There are clear provisions in the relevant test methods. Impact test should be specified in the peak acceleration, duration and impact pulse waveform, as well as the time of electrical continuity interruption.

⑤.Other environmental properties According to the use requirements, other environmental properties of the electrical connector are sealing (air leakage, liquid pressure), liquid impregnation (the ability to resist malodorization of specific liquids), low air pressure, and so on.

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