A small 13.7 KB PDF filed as a schematic but named for the 2SC1384, an NPN transistor under the JIS 2SC prefix, with UTC indicating the Unisonic Technologies version of the part. The content is therefore expected to be a datasheet, not a device circuit. Use it to confirm the base, collector and emitter order for the specific package, check the maximum collector voltage and dissipation, and compare ratings when a cross-reference replacement is needed. Different makers' versions of one part number can differ in pinout, so check against the marking.
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.