At 86.1 KB, this PDF named 175bgq045 is listed as a schematic, yet the code fits a high-current Schottky rectifier, with 045 typically indicating a 45 V reverse voltage. It should be a datasheet with forward characteristics, surge rating, thermal data and package drawing. Repair technicians use it to verify a substitute for a shorted rectifier in welding, telecom or server power supplies. Open it in a PDF reader and confirm the full part code on the device, including package letters, before ordering.
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.