The production process of the small power distribution unit (SPDU) directly affects its service life. First, if the material quality of the small power distribution unit (SPDU) is not ensured during the manufacturing process, such as choosing low-quality metal or plastic, it may cause the small power distribution unit (SPDU) to be susceptible to corrosion or deformation, thereby reducing its overall durability. Secondly, improper welding and connection processes may also cause the internal components of the small power distribution unit (SPDU) to become loose or the connections to be weak, affecting its normal operation and safety. In addition, during the coating process of the protective layer, if the coating is uneven or of poor quality, the small power distribution unit (SPDU) may be susceptible to erosion by environmental factors and accelerate aging. Finally, deficiencies in quality control and testing during the manufacturing process may also result in potential defects not being discovered in time. Therefore, through strict quality management and advanced manufacturing processes, the product quality of the small power distribution unit (SPDU) can be improved, its service life can be extended, and its reliability and stability in long-term use can be ensured.