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Basic performance of rectangular heavy-duty connectors
The basic performance of rectangular heavy-duty connectors can be divided into three main categories: mechanical performance, electrical performance and environmental performance.
Rectangular Heavy Duty ConnectorThe basic performance can be divided into three main categories: mechanical performance, electrical performance and environmental performance. Much
1. Mechanical properties: The maximum insertion force and the minimum separation force are specified in the relevant standards. In terms of connection function, the insertion force is an important mechanical property. This shows that from the perspective of use, the insertion force is small, and if the separation force is too small, it will affect the reliability of the contact.
Another important performance isRectangular Heavy Duty ConnectorThe service life of the machinery. The service life of machinery is actually a long-term indicator, which is called mechanical operation in GB5095. It is used once inserted and once unplugged as a cycle to judge whether the connector can normally complete its connection function after the specified plug-in cycle.
Rectangular Heavy Duty ConnectorThe tensile force and mechanical life are related to the coating quality (sliding friction coefficient) and the dimensional accuracy of the contact structure (positive pressure).
2. Electrical performance:Rectangular connectorThe main electrical characteristics include electrical strength, contact resistance and insulation resistance.
① Electrical strength: The ability to withstand the rated test voltage between the contacts of the connector or between the contacts and the housing is the electrical strength or withstand voltage, dielectric withstand voltage. Much
② contact resistance: the contact resistance of the connector from a few milliohms to tens of milliohms. High-quality electrical connectors should have low and stable contact resistance.
③ Insulation resistance: It is an indicator for measuring the insulation performance between the contacts of the electrical connector and between the contacts and the housing. Its size is about hundreds to giga ohms.
④ Other electrical properties:EMI leakage attenuation is used to evaluate the EMI shielding effect of the connector and is usually tested in the frequency range of 100MHz to 10GHz.
Common environmental characteristics of environmental performance include temperature resistance, moisture resistance, etc.
① CurrentlyRectangular Heavy Duty ConnectorThe minimum temperature is -45 ℃ and the maximum working temperature is 140 ℃. The operating temperature is considered to be equal to the sum of the ambient temperature and the temperature rise of the contact due to the temperature rise caused by the heat generated at the current contact point when the connector is in operation.
The entry of the moisture-proof layer will affect the insulation performance of the connector, thereby rusting the metal parts. The constant damp heat test conditions are relative humidity 90%-95% and temperature 40±20 degrees. The test duration is at least 96 hours. The alternative damp heat test is more stringent.
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