In the datasheets, 1@1A is stated as the peak forward voltage.In order to operate efficiently, this device should have a peak RMS reverse voltage range of 560.
GBL206 C2 Features
the forward peak voltage is 1@1A the peak RMS reverse voltage range of 560
GBL206 C2 Applications
There are a lot of Taiwan Semiconductor GBL206 C2 applications of RF diodes.