The structure of waterproof connectors is generally divided into: metal contact conductor and shell metal.

The difference between metal and plastic shells:

1. Mechanical life

 The mechanical life of the waterproof connector refers to the life of the number of times of plugging and unplugging, and the industry standard usually specifies 500 to 1000 times. When reaching the specified mechanical life, the contact resistance, insulation resistance and withstand voltage of the waterproof connector should not exceed the specified standard values, which is not much different from the metal shell and the plastic shell.

 2. Electrical properties

 The rated voltage, rated current, contact resistance, insulation resistance, etc. are in accordance with the specified standard values, which is the same as the metal and plastic shell.

3. Environmental parameters

 The environmental parameters mainly include ambient temperature, humidity, sudden temperature change, atmospheric pressure and corrosive environment. The environment in which the waterproof connector is used, stored, and transported has a significant impact on its performance, so the corresponding metal shell must be selected according to the actual environmental conditions, which is better than plastic.

4. Termination method

 The termination method refers to the connection method between the hardware contacts of the male and female connectors of the waterproof connector and the wires and cables.

     Comprehensive analysis, in addition to the need for the shielding function of the connector, the performance of the metal and plastic shells is not very different in all aspects. Compared with metal shell, plastic has lower cost and more reasonable structure.