1.1 Ambient temperature:
 The external ambient temperature is not high, but if the product works in the chassis, the heat dissipation conditions are poor and other components heat up, which will cause the ambient temperature of the product to be much higher than the external ambient temperature. Use outside the specified ambient temperature can also damage metal plating or insulators.

1.2 Moisture or water: 
Moisture or water will cause a water film on the surface of the insulator to reduce the insulation performance, and even cause miscommunication between adjacent contacts. Generally, connectors that are used in high humidity or under water conditions for a long time should use sealed connectors.

1.3 Low air pressure: 
The air pressure will decrease under high-altitude conditions (except in the constant air pressure sealed chamber). When the product is under low air pressure, the dielectric withstand pressure of the product will decrease. If the transmitted voltage is higher than the product technical conditions, it is possible Electrical breakdown occurs, resulting in failure.

1.4 Corrosive environment: 
there is salt spray at sea, and chemical raw material storage warehouse has acid and alkali, etc. These conditions will cause corrosion and erosion on the metal parts and insulators of the connector. When selecting connectors, special requirements or selections can be made to the manufacturer. products that meet these requirements.

1.5 Mechanical conditions: 
In actual use, after the cable and the contact piece are crimped, the cable should be fixed by clips or other methods. The cable that is too long and has no fixing measures will be endangered under the action of external forces such as vibration or impact. The safety of the cable may cause faults such as cable breakage and damage to the micro-rectangular connector in severe cases.