Datasheet in PDF for the J13009, a high-voltage NPN switching transistor in the 13009 family. The file name names only the part, so check the document for exact ratings and package details. Transistors of this type are widely used in ballasts, ATX supplies and half-bridge converters as the main power switch. Technicians consult the sheet to confirm voltage and current limits, gain, switching times and lead order before fitting an MJE13009 or other equivalent. Replace both devices of a half-bridge pair together and test the drive transformer circuit.
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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