The peak forward voltage is 1.3 according to the datasheets.This device consumes about 1 continuous forward current at any given time.To operate, a DC reverse voltage less than 50 must be used.
RGF1A-E3/5CA Features
the forward peak voltage is 1.3
RGF1A-E3/5CA Applications
There are a lot of Vishay RGF1A-E3/5CA applications of RF diodes.