Filed as a schematic, this PDF of roughly 100 KB is named 10CTQ150L. The CTQ code in International Rectifier and Vishay numbering identifies a common-cathode dual Schottky rectifier, and the L suffix marks a package variant within that family. Expect a datasheet with pin assignment, voltage and current ratings and thermal figures. Technicians use it when a dual Schottky in a switching supply output fails and must be replaced with the right package. Confirm the full marking, including suffix, on the original part.
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.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.