A 28.0 KB PDF classed as a schematic whose name, 3LP01C, reads as a component part code ending in C. The file name gives no device, board number or manufacturer. Its small size suggests a single-part sheet with pinout, absolute maximum ratings and an outline drawing, readable in any PDF viewer. It serves for identifying small semiconductors found around power circuits, checking pin orientation while testing for a short and finding a matching substitute. Confirm the full code and package type before relying on it.
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.