Bad contact.
The metal conductor inside the terminal is the core part of the terminal, which transmits the voltage, current or signal of the external wire or cable to the corresponding contact part of its matching connector. Therefore, the contacts must have good structure, stable and reliable contact retention and good electrical conductivity. Due to unreasonable structural design of contact parts, wrong material selection, unstable mold, poor processing size, rough surface, unreasonable surface treatment processes such as heat treatment and electroplating, improper assembly, harsh storage and use environment, improper operation and use, the contact parts of the contact parts and The mating parts will cause poor contact.

Poor insulation.
The function of the insulator is to keep the contacts aligned in the correct position and to insulate the contacts from the contacts and from the housing. Therefore, insulators must have excellent electrical properties, mechanical properties and process formability. Especially with the widespread use of high density and small new energy rectangular contacts, the effective wall thickness of insulators is getting thinner and thinner. This places stricter requirements on insulation materials, injection mold precision and molding process.