The name 35gq150 gives nothing more than what resembles a semiconductor part number; this 48.1 KB PDF is indexed under schematics with no device, brand or revision noted. Expect a part reference sheet that shows pinout, package outline and rated values. These details help when swapping a damaged component, verifying orientation before soldering, or judging a substitute. Any PDF reader opens it. Make sure the code on your physical part matches including all digits, as a different suffix generally means different ratings within the family.
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.