Document for the 2N4402 in a 298 KB PDF with an RE suffix, possibly signifying a revised or alternate edition; the name gives no explanation. Though indexed as a schematic, it should be a manufacturer datasheet. Use it to look up pinout, limiting values and characteristic data when testing the part or picking an equivalent. Open it in any PDF viewer, check the package outline against your component, and compare with other versions if values differ.
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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)