The structure of waterproof connectors is generally divided into: metal contact conductors and shells.
Differences between metal and plastic (nylon TA66) shells:
1. Electrical performance
The rated voltage, rated current, contact resistance, insulation resistance, etc. are in accordance with the specified standard values, which are the same as the metal and plastic housings.
2. 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.
3. 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. Metal is the same as plastic housing. Termination methods can be divided into five types: welding, crimping, wrapping, piercing, and screws.
4. Environmental parameters
The environmental parameters mainly include ambient temperature, humidity, rapid 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.
Comprehensive analysis, in addition to the need for the shielding function of the connector, there is little difference in performance between metal and nylon TA66 plastic shells. Compared with metal shell, plastic has lower cost and more reasonable structure.
