A 122 KB PDF datasheet named SDZS003A, a literature number whose final letter usually indicates a document revision. The component itself is not stated in the name, so its identity has to be read from inside the file. With the part confirmed, a technician can use the pin table, recommended operating conditions and package outline to measure the device on a board, verify correct orientation and footprint, and judge whether observed voltages fall within specification.
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 @datasheet_technar_org. 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.