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 400 must be used.
HS1G-K R3G Features
the forward peak voltage is 1.3
HS1G-K R3G Applications
There are a lot of Taiwan Semiconductor HS1G-K R3G applications of RF diodes.