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Connector of the pin of the various performance instructions

Date:17/10/2017View:
The connector is an indispensable part of the electronic device, which is interrupted in the circuit or isolated circuit between the circuit, set up a bridge of communication, so that the current flow, so that the circuit to achieve a predetermined function. Connector pin form and structure is ever-changing, with the application of objects, frequency, power, application environment, etc., there are different forms of connectors. Despite the large number of connectors, the basic performance can be summarized into three categories: mechanical performance, electrical performance and environmental performance.
In terms of connector function, the insertion force is an important mechanical property. Insertion force is divided into insertion force and pull out force (pull force, also known as separation force), the two requirements are different. The maximum insertion force and the minimum separation force in the relevant standard, which indicates that the insertion force is small from the point of view of use (thus having a low insertion force LIF and a non-insertion force ZIF structure) and the separation force is too small, It will affect the reliability of contact.
Another important mechanical property is the mechanical life of the connector. Mechanical life is actually a durability (durability) indicators, in the national standard GB5095 it is called mechanical operation. It is a single insert and a pull out as a cycle to the specified plug in the loop after the connector pin can normally complete its connection function (such as contact resistance) as a basis for judging. The insertion force and mechanical life of the connector are related to the contact quality (sliding friction coefficient) of the contact part of the contact structure (positive pressure) and the dimensional accuracy (alignment) of the contact arrangement.
Vibration and Shock Performance: Vibration and shock resistance is an important feature of electronic connectors that are particularly important in special applications such as aerospace and aerospace, railways and road transport. It is a test of the robustness and electrical contact of electrical connectors An important indicator of reliability. In the relevant test methods are clearly defined. The impact test should specify the peak acceleration, duration and impact pulse waveform, and electrical continuity of the time.
Contact resistance: High quality electrical connectors should have low and stable contact resistance. The contact resistance of the connector varies from a few milliohms to several tens of milliohms. The factors that affect the contact resistance are: resistivity of the contact surface material, contact pressure, contact area, contact shape, surface conditions (relative cleanliness roughness and hardness), current size, open circuit voltage at contact, And the thermal conductivity of the wire.
Dielectric strength or resistance to voltage, dielectric pressure, is to identify the connector between the contacts or between the contact with the shell to withstand the rated test voltage capacity. The measurement method is to apply a test voltage higher than the operating voltage between the contacts of the connector and between the contact and the housing for a predetermined time to determine the correctness of the insulating material, the insulation pitch, the insulation structure, and checking the presence of the parts Of the defect, the assessment of the electrical connector pin withstand the open, off, surge and similar phenomena caused by the transient over-voltage capability
Insulation resistance is an indicator of the insulation performance between the contacts of the electrical connector and between the contacts and the enclosure, which is of the order of several hundred megohms to several gigahertz. It is determined by the dielectric dielectric capacity, the greater the better the insulation resistance value. Insulation resistance can not be equated with pressure, because the insulating material is mixed or synthesized by different materials, their insulation resistance is naturally different. So the measure of insulation resistance can not completely replace the degree of cleanliness or non-destructive measure.
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