Part documentation in PDF form for the 2SC4245, 335 KB, catalogued in the schematic category. The file name gives only the part number without maker, package or version. Following the JIS naming scheme, a 2SC prefix denotes an NPN transistor of the high-frequency class. Use the sheet to check pinout, package outline, breakdown voltage, maximum current and gain figures when diagnosing or replacing the device. The body is usually marked C4245, so match that code and confirm any substitute meets these ratings.
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.