Why is the terminal defective?
Blog | Apr 01,2023
The terminal is a metal part set in the insulating material of the connector, and its function is to guide the wire to make an electrical connection with the electronic device. With the increasingly stringent requirements for industrial automation control precision, the number of terminals is increasing, but there are also some bad factors in the use of terminals.
During use, the mating terminals of the connector may have peeling, corrosion, scratches on the coating surface, flashes and cracks on the plastic shell, rough processing or deformation of the tight contact parts of the contacts, etc., resulting in poor appearance.
Poor terminal insulation
The function of the terminal insulator is to hold the contacts in the correct position and to insulate the contacts from each other and from the housing. Therefore, insulating parts must have excellent electrical properties, mechanical properties, and process-forming properties.
Especially with the widespread use of high-density and miniaturized terminals, the effective wall thickness of insulators is getting thinner and thinner. This puts forward stricter requirements on insulating materials, injection mold precision, and molding process.
Poor terminal fixation
Terminals need to be fixed in a specific position for a stable connection. If the installation is not perfect or the product plug-in life cycle is insufficient, it will lead to poor fixation, which will affect reliable contact, cause instantaneous power failure, or disintegrate the product in severe cases.
Disintegration refers to the unreliable structure of the terminal block in the plugged state due to materials, design, process, and other reasons, resulting in abnormal separation of plug and socket, pin and socket, which will cause serious consequences of interruption of power transmission and signal control of the control system.
Due to unreliable design, wrong material selection, improper selection of molding process, poor quality of heat treatment, mold, assembly, welding, and other processes, improper assembly, and other reasons. , causing poor fixation.
Poor contact with terminals
The metal conductor inside the terminal is the core part of the terminal, which transmits power and signals to other parts that come into contact with it. Therefore, the metal conductor inside the terminal must have good electrical conductivity.
If the design of the contact is unreasonable, the material is selected incorrectly, the size is not up to standard, or the plating is not properly processed, it will cause poor contact with the connector terminal.
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