When choosing a USB 3.0 connector, there are many factors to consider, among which environmental parameters are one of the most important factors, including temperature, humidity, air pressure, etc. The usage methods of USB 3.0 connectors vary under different environmental conditions. Below are some tips for using them in extreme environments.

1. High temperature environment: The metal and insulation materials of the USB 3.0 connector determine the working environment temperature of the connector. High temperature can damage the edge material, causing a decrease in insulation resistance and withstand voltage performance; For metals, high temperatures can cause contact pairs to lose elasticity, accelerate oxidation, and cause coating deterioration. The usual ambient temperature is -40~80 ℃, which may be higher in special occasions.

2. Wet environment: the relative humidity is greater than 80%, which is the main reason for Electrical breakdown. The humid environment causes the absorption and diffusion of water vapor on the surface of insulators, which can easily reduce the insulation resistance to below the M Ω level. Long term exposure to high humidity environments can cause physical deformation, decomposition, and escape of substances, resulting in respiratory effects, electrolysis, corrosion, and cracking. Especially for USB 3.0 connectors outside the equipment, it is often necessary to consider environmental conditions such as humidity, water seepage, and pollution, in which case sealed connectors should be selected.

3. Temperature rapid change environment: The humidity rapid change test simulates the actual use of USB 3.0 connectors in cold environments to warm environments, or simulates the rapid temperature changes in the environment of space vehicles and detectors. Sudden temperature changes may cause cracks or delamination of insulation materials.

4. Thin air environment: At high altitudes with thin air, plastic emits gas to pollute the contact pairs, increasing the trend of corona generation, reducing voltage resistance, and causing short circuit faults in the circuit. When reaching a certain value at high altitude, the performance of plastic deteriorates. Therefore, when using unsealed connectors at high altitudes, it is necessary to reduce the rating for use.

5. Corrosive environment: Based on the usage of USB 3.0 connectors in different corrosive environments, choose connectors with corresponding metal, plastic, and coating structures, such as those used in salt spray environments. If there is no corrosion-resistant metal surface, the performance will rapidly deteriorate. In environments containing a considerable concentration of SO2, connectors with silver plated contact pairs should not be used. In hot and humid areas, mold is also an important issue.

Some friends ask: Is it necessary to use high-quality USB 3.0 connectors when designing electronic products? The question mentioned by this friend is often encountered by many USB system designers and is also a misconception, because the importance of connectors is often underestimated in design and cheap but poor quality connectors are used. Although this may seem to save costs, the subsequent maintenance costs are considerable. Low quality connectors can cause the USB system to fail to operate normally, Product recall, product liability cases, circuit board damage, rework and maintenance, and eventually lead to the loss of users. Tongxin Fu Xiaobian believes that this is not what enterprises want to see. Therefore, when designing USB products, do not underestimate the importance of connectors, and choose a high-quality and suitable USB 3.0 connector.