Datasheet in PDF for the SSH6N80, an N-channel power MOSFET that the file name rates at 800 V and 5 A. Repair technicians typically meet parts of this class in the primary side of switch-mode power supplies, TV power boards and monitor adapters. The document lets you verify drain-source voltage, on-resistance, gate threshold, package outline and pin order before choosing a replacement. When a MOSFET like this fails short, also check the gate resistor, the PWM controller and the current-sense resistor. It opens in any PDF viewer.
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.