Documentation for the 2SC3135 transistor, delivered as a 127 KB PDF in the schematics category. JIS numbering assigns the 2SC prefix to NPN bipolar devices, and the case usually shows C3135. The file name provides no package, gain group or brand. A repair technician refers to such a sheet when identifying collector, base and emitter for in-circuit checks, verifying maximum ratings for the rail involved, and finding a suitable cross-reference when the original transistor has failed and is no longer stocked.
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.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.