Part datasheet for the 1N5404 rectifier diode, the 400 V grade of the 3 A 1N5400 family, stored as a 43.4 KB PDF in the schematic category. No vendor or revision appears in the name. Contents typically cover electrical ratings, forward characteristic curves and the axial package drawing. Such diodes are found in power input stages, bridges and protection paths. Use the sheet to confirm a suitable replacement, preferring an equal or higher voltage grade with the same current rating.
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.