1. Mechanical properties As far as the connection function is concerned, the insertion force is an important mechanical property. The insertion force is divided into the insertion force and the extraction force (the extraction force is also called the separation force), and the requirements of the two are different. In the relevant standards, there are provisions for the maximum insertion force and the minimum separation force, which means that from the point of view of use, the insertion force should be small (thereby a structure with low insertion force LIF and no insertion force ZIF), and if the separation force is too small, will affect the reliability of the contact.
2. The insertion force and mechanical life of the conductive pin connector are related to the contact structure (positive pressure), the coating quality (sliding friction coefficient) of the contact part, and the dimensional accuracy (alignment) of the contact arrangement.
3. Electrical properties The main electrical properties of conductive field connectors include contact resistance, insulation resistance and electric strength.
①Contact resistance High-quality electrical conductive connectors should have low and stable contact resistance. The contact resistance of conductive field conductive pin connectors varies from a few milliohms to tens of milliohms.
②Insulation resistance measures the insulation performance between the contacts of the electric charging pin connector and between the contacts and the shell, and its magnitude ranges from hundreds of megohms to several gigaohms.
③ Dielectric strength, or withstand voltage, dielectric withstand voltage, is to characterize the ability to withstand rated test voltage between the contacts of the charging outer pin connector or between the contacts and the shell.
④Other electrical properties.
The electromagnetic interference leakage attenuation is to evaluate the electromagnetic interference shielding effect of the connector, and the electromagnetic interference leakage attenuation is to evaluate the electromagnetic interference shielding effect of the charging pin connector, which is generally tested in the frequency range of 100MHz~10GHz.
For the RF coaxial charging pin connector, there are also electrical indicators such as characteristic impedance, insertion loss, reflection coefficient, and voltage standing wave ratio (VSWR). Due to the development of digital technology, in order to connect and transmit high-speed digital pulse signals, a new type of connector, namely high-speed signal conductive pin connector, has appeared. Correspondingly, in terms of electrical performance, in addition to characteristic impedance, some new Electrical indicators, such as crosstalk (crosstalk), transmission delay (delay), time delay (skew), etc.
4. Environmental performance Common environmental performance includes temperature resistance, humidity resistance, salt spray resistance, vibration and shock, etc.
①Temperature resistance At present, the maximum working temperature of the charging pin connector is 200°C (except for a few high-temperature special connectors), and the minimum temperature is -65°C. When the conductive pin connector is working, the current generates heat at the contact point, resulting in a temperature rise, so it is generally believed that the operating temperature should be equal to the sum of the ambient temperature and the temperature rise of the contact point. In some specifications, the maximum temperature rise allowed by the connector at the rated operating current is clearly specified.
②The intrusion of moisture resistance will affect the insulation performance of the connection h and corrode metal parts. The constant damp heat test conditions are relative humidity 90%~95% (according to product specifications, up to 98%), temperature +125±45°C, and the test time is at least 96 hours according to product regulations. The alternating damp heat test is more severe