Whether it is a high-frequency electrical connector or a low-frequency electrical connector, insulation resistance, dielectric withstand voltage (also known as dielectric strength) and contact resistance are the most basic electrical parameters to ensure that the electrical connector can work normally and reliably. Usually, there are clear technical index requirements and test methods in the routine delivery inspection items of groups A and B of the quality consistency inspection of the technical conditions of electrical connector products. These three inspection items are also an important basis for users to judge the quality and reliability of electrical connectors. However, according to the author's practice in the inspection of electrical connectors for many years, it has been found that there are many inconsistencies and differences in the specific implementation of relevant technical conditions among various manufacturers and between manufacturers and users. , operating methods, sample handling and environmental conditions and other factors are different, which directly affect the accuracy and consistency of the test. For this reason, it is very beneficial to improve the reliability of electrical connector inspection to conduct some special discussions on the three conventional electrical performance inspection items and the problems existing in actual operation.        In addition, with the rapid development of electronic information technology, a new generation of multi-functional automatic testers are gradually replacing the original single-parameter testers. The application of these new test instruments will greatly improve the detection speed, efficiency, accuracy and reliability of electrical properties.   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 on the surface or inside of the insulating part. That is, insulation resistance (MΩ) = voltage (V)/leakage current (μA) applied to the insulator. Through the insulation resistance test, it is determined whether the insulation performance of the connector meets the requirements of the circuit design, or whether its insulation resistance meets the relevant technical conditions when it is subjected to environmental stress such as high temperature and humidity.      Insulation resistance is the limiting factor in designing high impedance circuits. Low insulation resistance means large leakage current, which will destroy the circuit and normal operation. If a feedback loop is formed, the heat and DC electrolysis generated by excessive leakage current will damage the insulation or deteriorate the electrical performance of the connector.        DMIC produces and sells various high-current connectors, connectors, UPS/EPS power sockets and other products, specializing in providing supporting equipment for manufacturers of automobiles, electric vehicles, communication power supplies, medical equipment, power distribution equipment, handling equipment, solar energy and new energy product service. The company has its own production and R&D base, and has passed ISO9001 quality system certification. The products have passed CE, 3C and other certifications, and meet ROSH, REACH and other environmental protection requirements.   If you are interested in our products, we have long provided plugs, connectors, battery connectors, UPS power connectors. Double pole connector, single pole connector, connector accessories, connector OEM wire harness processing service