Indexed as a schematic, this 83.3 KB PDF named 150k most likely documents a stud-mount power rectifier diode series, as the short code follows the pattern used for such high-current rectifier families, rather than any board or device. Expect voltage grade tables, surge ratings, thermal data and stud dimensions. It is useful when repairing industrial rectifier bridges, chargers or welders. Because the name is brief, compare the full marking on the diode, including voltage class and polarity suffix, before relying on it.
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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