The 2SC4504 transistor is covered by this 83.2 KB PDF data sheet. Its 2SC prefix follows Japanese JIS numbering for NPN bipolar devices; the name gives no manufacturer, package or rating details. Expect absolute maximum values, electrical characteristics and an outline drawing showing pin order. Use it when a transistor in a power or signal stage has failed and a replacement or equivalent must be chosen. Compare case style and lead assignment with the board footprint before fitting.
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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