The 641-0838-Z is a 24V power supply with a current of 2A and a power of 45W. The 641-0838-Z power supply is used in the Schneider brand INROW ACRC 301S cooler to generate 24 VDC from the 240 VAC input. Thanks to the switching system, the dimensions of the power source are very small (compared to linear power sources). Only two very small heat sinks have been used for the AC switch and a regulator. It is one of the important spare parts of Schneider machines in data centers.