The question of whether to use a transformer power supply or a switch-mode power supply is no longer discussed today. In addition to superior technical properties, switched-mode power supplies impress with low costs, low weight and little space requirement. Certain requirements such as PFC (Power Factor Correction > 0.9 and sinusoidal mains current) can only be met with switched-mode power supplies. The question remains, what are the greatest influences on the service life and reliability of a switched-mode power supply?
This is a companion discussion topic for the original entry at https://eepower.com/assemblies/influence-operating-temperature-service-life-and-reliability-switching-power-supplies