This 47.8 KB PDF is labelled 1T379 and catalogued as a schematic. No device model, manufacturer or revision appears in the name. The size suggests a compact component sheet rather than a board diagram, likely with pinout, package outline and electrical ratings. Open it with any PDF reader and use it to confirm pin orientation before soldering, check suspect values against the specification, and choose a suitable replacement. Make sure the marking on the fitted part really reads 1T379.
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.