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 1000 must be used.
RGL41M-E3/26 Features
the forward peak voltage is 1.3
RGL41M-E3/26 Applications
There are a lot of Vishay RGL41M-E3/26 applications of RF diodes.