In the datasheets, 1.2 is stated as the peak forward voltage.A continuous forward current of 0.1 is the maximum consumption of this device.RF diode is necessary to operate the device at a DC reverse voltage below 200.
1SS403,H3F(B Features
the forward peak voltage is 1.2
1SS403,H3F(B Applications
There are a lot of Toshiba 1SS403,H3F(B applications of RF diodes.