The datasheets indicate that the peak forward voltage is 1.At any given time, this device consumes about 1 continuous forward current.The DC reverse voltage must be less than 400.System forward voltage should be kept above 1 V volts.
US1G/61T Features
the forward peak voltage is 1
US1G/61T Applications
There are a lot of Vishay US1G/61T applications of RF diodes.