The datasheets state that the peak forward voltage is 1.3.A continuous forward current of about 2 can be consumed by this device at any given time.In order to operate, you will need a DC reverse voltage less than 800.
RS2K R4G Features
the forward peak voltage is 1.3
RS2K R4G Applications
There are a lot of Taiwan Semiconductor RS2K R4G applications of RF diodes.