The datasheets state that the peak forward voltage is 0.5.A continuous forward current of about 1 can be consumed by this device at any given time.In order to operate, you will need a DC reverse voltage less than 20.
SS12HE3_B/H Features
the forward peak voltage is 0.5
SS12HE3_B/H Applications
There are a lot of Vishay SS12HE3_B/H applications of RF diodes.