Reference document for the 2N4921 in a 238 KB PDF, with an RE suffix whose meaning is unstated and may mark a revised edition. It is filed as a schematic, yet a file named this way is normally a manufacturer datasheet. Use it to confirm pinout, maximum ratings and characteristic curves when troubleshooting or choosing a replacement. Match the package outline to the real component and compare figures with other editions if anything looks inconsistent.
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)