The datasheets state that the peak forward voltage is 1.1.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 1600.A forward voltage higher than 1.1(V) is recommended for systems.
S1Y Features
the forward peak voltage is 1.1
S1Y Applications
There are a lot of Diotec Semiconductor AG S1Y applications of RF diodes.