PDF datasheet, 43.4 KB, for the 1N5406 general-purpose rectifier, rated 600 V within the 3 A 1N5400 series. Catalogued under schematics, it is a single-component reference without vendor or revision in the name. Expect maximum ratings, thermal data and axial case dimensions. Useful when diagnosing a shorted bridge or input diode in a power supply and choosing a correct replacement. Higher-voltage grades of the same series generally substitute safely, provided the lead spacing and current rating match.
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.