Capacitor DUE board 10uf polarized?
Somebody to know why ?


Only the guy who drew the schematic.

Most likely, they were just sloppy about what symbol they use for these things in their schematics. 

It's conceivable that they designed the thing years ago to use polarized capacitors, but changed to ceramics when 10 uF became affordable in an appropriate package.


  I guess the capacitor on board is like a capacitor 50v like Capacitor Murata


That's only a 5 V power line (unless they're using some newish USB power delivery system that provides higher voltage), so it could very well be a 10 or 16 or 25 V rated part.