Introduction to the three basic properties of Dian Wei FPC connector

FPC connector performance can be divided into three major categories: mechanical performance, electrical performance and environmental performance.

1. Mechanical properties in terms of FPC connector function, plug and pull force is an important mechanical properties of FPC connector. Insertion and pulling force is the insertion and pulling force, the two are different requirements. In the relevant standards, there are provisions of maximum insertion force and minimum dial force, which indicates that the insertion force should be small, and if the separation force is too small, it will affect the reliability of contact. Another important mechanical property is the mechanical life of the FPC connector. Mechanical life is a durability indicator for FPC connectors, which is called mechanical operation in the NATIONAL standard. It takes one insertion and one pull out as a cycle, and evaluates whether the connector can normally complete its connection function after the specified insertion and pull out cycle. Dian Wei can guarantee the insertion and removal force and mechanical life of FPC connector for more than 20 times are related to the coating quality of the contact parts and the size accuracy of the contact parts. The Dian contacts are all gold plated.

2. Electrical properties The main electrical properties of the FPC connector include contact resistance, insulation resistance, and electrical strength.

High quality electrical connectors should have low and stable contact resistance. The contact resistance of the connector varies from a few milliohm to tens of milliohm. For the most part, tin tin products remain below 50 milliohm.

The insulation resistance measures the insulation performance between the contacts of electrical connectors and between the contacts and the shell, and its order of magnitude is hundreds of megohm to thousands of megohm. 500 MEgohm tin tin is.

③ The electrical strength, or voltage resistance, medium voltage resistance, is characterized by the connector contact between or between the contact and the shell withstand rated test voltage ability. Voltage: 250V AC

3. Environmental performance Common environmental performance includes temperature resistance, moisture resistance, vibration and impact.

At present, the highest working temperature of the connector is 200℃, and the lowest temperature is -65℃. When the connector is working, the current generates heat at the contact point, resulting in a temperature rise. Therefore, it is generally considered that the operating temperature is equal to the sum of the ambient temperature and the temperature rise of the contact point. In some specifications, the maximum temperature rise allowed for connectors at rated operating current is specified.

(2) The invasion of moisture resistance will affect the insulation performance of the connection H and rust the metal parts. Constant humidity and heat test conditions are relative humidity 90%~95%, temperature +40±20℃, test time according to product regulations, at least 96 hours. Alternating wet - heat tests are more rigorous.

③ When the salt spray resistant connector works in the environment containing moisture and salt, the metal structure parts and the surface treatment layer of the contact parts may produce electrochemical corrosion, affecting the physical and electrical properties of the connector. To evaluate the ability of electrical connectors to withstand this environment, a salt spray test is prescribed. The connector is suspended in a temperature-controlled test chamber to form a salt spray atmosphere, which is exposed for at least 48 hours as specified by the product specification.

Vibration and impact resistance is an important performance of the electrical connector, it is an important indicator of the robustness of the mechanical structure of the electrical connector and the reliability of electrical contact. There are specific provisions in the relevant test methods. Peak acceleration and interruption of electrical continuity shall be specified in the impact test.

⑤ Other environmental performance According to the requirements of use, other environmental performance of the electrical connector and sealing, low pressure, etc