The peak forward voltage is 1.7 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.
HS1M-K R2G Features
the forward peak voltage is 1.7
HS1M-K R2G Applications
There are a lot of Taiwan Semiconductor HS1M-K R2G applications of RF diodes.