In the datasheets, 1.2@9A is stated as the peak forward voltage.A continuous forward current of 5 is the maximum consumption of this device.RF diode is necessary to operate the device at a DC reverse voltage below 440.
1N5551US/TR Features
the forward peak voltage is 1.2@9A
1N5551US/TR Applications
There are a lot of Microsemi 1N5551US/TR applications of RF diodes.