A 107 KB PDF covering the 2SC4270, a JIS-numbered part. The 2SC prefix denotes an NPN transistor intended for high-frequency use. The file name states no manufacturer, package or document revision, so open it in any PDF reader to see those details. In repair work this kind of document helps identify base, collector and emitter pins, check absolute maximum ratings and choose an equivalent when the original is unavailable. Bodies are usually marked C4270, so match that code and the package before swapping parts.
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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