The datasheets indicate that the peak forward voltage is 0.68.At any given time, this device consumes about 40 continuous forward current.The DC reverse voltage must be less than 45.
40CTQ045STRRPBF Features
the forward peak voltage is 0.68
40CTQ045STRRPBF Applications
There are a lot of Vishay 40CTQ045STRRPBF applications of RF diodes.