Download the FMSK10200C-D2G datasheet PDF.
This datasheet also covers the FMSK1020C-D2G variant, as both devices belong to the same schottky barrier rectifier family and are provided as variant models within a single manufacturer datasheet.
Note: The manufacturer provides a single datasheet file (FMSK1020C-D2G-AmericanFirstSemiconductor.pdf) that lists specifications for multiple related part numbers.