Datasheets indicate 1.1 as the peak forward voltage.RF diode consumes about 1 continuous forward current at any given time.RF diode must be operated wRF diodeh a DC reverse voltage less than 1000 V.
S1M-HE3/13T Features
the forward peak voltage is 1.1
S1M-HE3/13T Applications
There are a lot of Vishay S1M-HE3/13T applications of RF diodes.