Listed as a schematic but carrying the part code 162cmq030, this 46.3 KB PDF is most likely the datasheet for a common-cathode dual Schottky rectifier rated around 30 V. It is the CMQ counterpart of the CNQ device and the package may differ, so do not assume the two are interchangeable without checking outlines. Use the document to confirm ratings and pinout before replacing an output diode in a power supply. Read it in a standard PDF viewer and check the marking on the original part.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.