According to the datasheets, the peak forward voltage is 1 volts.Having a peak RMS reverse voltage range of 560, this device can be utilized efficiently.
GBU6K-E3/72 Features
the forward peak voltage is 1 the peak RMS reverse voltage range of 560
GBU6K-E3/72 Applications
There are a lot of Vishay GBU6K-E3/72 applications of RF diodes.