1. Connector type
What to connect, where to use, etc. These issues are the first things to consider, which determines the type of connector selected. The location where the connector is used (indoor, outdoor, corrosive environment, etc.) will affect whether to enhance the sealing of the connector or add a shielding shell outside the insulating body.

2. Mechanical performance requirements
For the connector, what volume and coverage area is effective; what is the allowable dimensional tolerance; what is the insertion and extraction force of the terminal; what is the durability of the connector (frequency of mating and unplugging)? These factors All are considered when selecting electrical connectors.
3. Electrical requirements
When choosing an electrical connector, consider the electrical requirements of the product. What kind of voltage and current requirements the product has, and whether the connector can be well used in such electrical properties, these questions about electrical requirements need to be considered. In addition, we also need to consider some other electrical conditions: resistance, allowable resistance change, millivolt drop, maximum current value, maximum voltage value, inrush current value, characteristic impedance, VSWR (voltage standing wave ratio), interpolation pull-out loss and EMI shielding efficiency.