Filed as a schematic, this 75.4 KB PDF named 30TPS16 reads like a power semiconductor part number rather than a board layout, so it is most likely a component datasheet. The trailing 16 commonly denotes the voltage class in such codes. Use it to check the pinout, gate or terminal assignment and maximum ratings before replacing the part in a supply or inverter stage. Confirm the exact marking on the physical component, since pin functions of through-hole power devices vary and a wrong orientation can destroy the replacement.
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.