Document for the IRF1404 power MOSFET, with the name listing 40 V and 202 A, stored as a 196 KB PDF. Indexed as a schematic, it should be the part datasheet showing ratings, on-resistance, gate charge, thermal data and package details. Repairers of inverters, battery tools and motor drives use it to check the pinout and select a replacement that matches voltage, current and switching behaviour. The headline current is a theoretical silicon figure at low case temperature, so practical limits are lower; confirm the exact marking before substituting.
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.