The connector will face a variety of different environments during the application process. If the application environment of the same type of connector is different, then the technical performance will be somewhat different. Therefore, when we evaluate the performance of a pcb connector, it is also an important indicator to see how much environmental conditions it can withstand. This article will take you to understand what are the main aspects of the environmental performance of the connector?
【Temperature Resistance】
At present, the maximum working temperature of the connector (HRS connector) is 200℃ (except for a few high-temperature special connectors), and the minimum temperature is -65oc. When the connector is working, the current generates heat at the contact point, which causes the temperature to rise, so it is generally considered that the working temperature should be equal to the sum of the ambient temperature and the contact temperature. In some specifications, the maximum temperature rise allowed by the connector under the rated operating current is clearly specified. The highest temperature of the plastic used in our pin headers is generally above 250°C.
【Humidity Resistance】
The intrusion of moisture will affect the insulation performance of the connector (HRS connector) and rust metal parts. Constant damp heat test conditions are relative humidity of 90%" 95% (according to product specifications, up to 98%), temperature of +40±20oc, and test time of at least 96h according to product specifications. Alternate damp heat tests are more stringent.
【Salt Spray Resistance】
When the connector (HRS connector) works in an environment containing moisture and salt, the metal structure and the surface treatment layer of the contact may produce galvanic corrosion, which will affect the physical and electrical properties of the connector. In order to evaluate the ability of electrical connectors to withstand this environment, a salt spray test is specified. It hangs the connector in a temperature-controlled test box, sprays out a sodium chloride solution with a specified concentration with compressed air to form a salt spray atmosphere, and its exposure time is specified by the product specification, at least 48h.
【Vibration and Shock Resistance】
Vibration and shock resistance is an important performance of electrical connectors (HRS connectors). It is particularly important in special application environments such as aviation and aerospace, railway and road transportation. It is to test the robustness and electrical contact of electrical connectors. An important indicator of reliability. There are clear regulations in the relevant test methods. In the shock test, the peak acceleration, duration and shock pulse waveform, as well as the interruption time of electrical continuity should be specified.
【Other environmental performance】
According to usage requirements, other environmental properties of electrical connectors (HRS connectors) include airtightness (air leakage, liquid pressure), liquid immersion (resistance to specific liquids) and low air pressure.
Connectors are designed and produced, and then used in all areas of our production and life, but also to meet the needs of various complex environmental applications, and to always maintain the current continuity and reliability of the connected components. This fully reflects the importance of the environmental performance of the connector. To choose a suitable connector product, it is necessary to have a thorough understanding of its environmental performance, so as to avoid the loss and harm caused by selection errors.