Welding conditions of welding terminals there is a significant difference, depending on the type of welding process steps of the terminal.

For wave soldering, installed in the terminals on the PCB is typical perforation install the type. Solder pin perforation must be accurate positioning, the right size, balanced place, and have good weldability, it is a good insertion and welding. Throughout the assembly process, be able to withstand the high temperatures of the preheating zone and transfer to the terminal body temperature by wave soldering. Flux shall not affect the terminal, must be easy to clear, there can be any residue. The entire assembly process must be able to use water to clean. Preheat temperatures often reach 100 ° C or higher, the peak temperature reached 280 ° C are not uncommon. The sudden high temperature is often the terminal melted, distorted, blistering and deformation. The assembly time is generally divided into a few minutes exposed to the flux in the time, a few minutes of warm-up period, the peak period of a few seconds, and a few minutes of cleaning and drying period.

In addition, choosing the appropriate metal materials, the resin can improve the reliability of the solder terminals.