Mechanical performance: refers to the ability of the connector to work normally under the impact of various mechanical external forces. Insertion and extraction force and mechanical life are important mechanical properties of the connector. Insertion and extraction force refers to the insertion force and extraction force. Mechanical life refers to the durability index of the machine. Whether the connector can be completed normally after the specified insertion and extraction cycle The connection function serves as a basis.
The insertion and extraction force of the connector is related to the mechanical life and the structure of the contact, the quality of the coating at the contact part, and the dimensional accuracy of the arrangement of the contact.
Electrical performance: refers to the ability of the connector to maintain normal connection functions under different current and voltage conditions, mainly including contact resistance, insulation resistance, electrical strength, and electromagnetic interference shielding effects. Others, such as radio frequency coaxial connectors, also have electrical indicators such as characteristic impedance, insertion loss, reflection coefficient, and voltage standing wave ratio; high-speed signal connectors, also have new electrical indicators such as crosstalk, transmission delay, and time lag.
Environmental performance: refers to the ability of the connector to maintain normal operation in various environments. Common environmental performance includes temperature resistance, humidity resistance, salt spray resistance, vibration, shock, etc., and other environmental properties include airtightness, liquid immersion, and low air pressure. Wait.
The working temperature of the connector should be equal to the sum of the ambient temperature and the temperature rise of the contact. At present, the high working temperature of the connector is 200℃, and the low temperature is -65℃. Moisture intrusion will corrode the metal parts of the connector and affect the insulation performance of the connector. Therefore, the constant humidity and heat conditions for the connector are at 90%-95% humidity (according to product specifications, up to 98%), +40±20℃ In the temperature range, 96 hours less experiment time is required.
When working in an environment containing moisture and salt, the metal structure of the connector and the surface treatment layer of the contact may produce galvanic corrosion, which affects the physical and electrical properties of the connector. The salt spray test is to verify the ability of the electrical connector to withstand this environment. In a test chamber with a salt spray atmosphere, the exposure time of the connector is specified to be at least 48 hours.
Vibration and shock resistance are important indicators to verify the robustness of the mechanical structure of the connector and the reliability of the electrical contact, and it is also one of the important properties of the connector. In the connector impact test, there are clear regulations on duration, interruption time, peak acceleration, pulse waveform, etc.
