The DC/DC converters with 12:1 input range are a perfect feature for railway and transportation applications. Given the various voltage systems used in railway applications, the 14-160V ultra-wide input range allows using only one module to fit all the different voltage ranges in different regions. Additionally, the patented hold-up function brings a huge benefit by allowing the integration of a variety of electrolytic capacitors into one model to cope with interruption and changeover, streamlining the development of the power stage of the system by simply using the module with 12:1 input range along with its patented hold-up function.