The peak forward voltage on the datasheets is 1.2.Normally, this device consumes about 3@Ta=70C of continuous forward current.During operation, DC reverse voltage must not exceed 600.
G3J-E3/54 Features
the forward peak voltage is 1.2
G3J-E3/54 Applications
There are a lot of Vishay G3J-E3/54 applications of RF diodes.