The peak forward voltage is 1.1 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.
S1M-HE3/11T Features
the forward peak voltage is 1.1
S1M-HE3/11T Applications
There are a lot of Vishay S1M-HE3/11T applications of RF diodes.