When we buy food, we will check the production date and shelf life on the packaging. Similarly, the terminal block connector also has a certain safe use period. If the terminal product is stored for a period of time under certain environmental conditions, the material may change, and the product performance will also decline. If it is not used for a long time, the reliability of the product will not be guaranteed.

The "shelf life" of the terminal block refers to the time from the completion of production and inspection to the storage time under certain environmental conditions before installation, while the effective storage period of the terminal block means that the quality and reliability of the terminal block during the storage period can meet the equipment requirements before installation. The required period, the basic period of validity refers to the effective storage period without considering the quality level of the terminal.
The length of the effective storage period of the terminal block is related to the following three factors:
1. The quality of the terminal is the basic condition to ensure that the quality and reliability of the terminal will not be greatly degraded during the effective storage period;
2. Environmental conditions for the storage of terminals;
3. Qualification criteria after the terminal is stored.