dålig kontakt
The metal conductor inside the terminal is the core part of the terminal, which transmits the voltage, current or signal from the external wire or cable to the corresponding contact of the matching connector. Therefore, the contacts must have excellent structure, stable and reliable contact retention and good electrical conductivity. Due to the unreasonable structural design of the contact parts, the wrong selection of materials, the unstable mold, the excessive processing size, the rough surface, the unreasonable surface treatment process such as heat treatment and electroplating, improper assembly, poor storage and use environment and improper operation and use, the contact parts will be damaged. Contact parts and mating parts cause poor contact.
Dålig isolering
The function of the insulator is to keep the contacts in the correct position, and to insulate the contacts from each other, and between the contacts and the housing. Therefore, the insulating parts must have excellent electrical properties, mechanical properties and process forming properties. Especially with the widespread use of high-density, miniaturized terminals, the effective wall thickness of the insulator is getting thinner and thinner. This puts forward more stringent requirements for insulation materials, injection mold precision and molding process. Due to the presence of metal excess on the surface or inside of the insulator, surface dust, flux and other contamination and moisture, organic material precipitates and harmful gas adsorption film and surface water film fusion to form ionic conductive channels, moisture absorption, mold growth, insulation material aging and other reasons, Will cause short circuit, leakage, breakdown, low insulation resistance and other poor insulation phenomena.