In accordance with the datasheets, the forward peak voltage is 1.8.Approximately 2 is the maximum continuous forward current consumed by this device at any given time.
CMH08A,LCSQ(J Features
the forward peak voltage is 1.8
CMH08A,LCSQ(J Applications
There are a lot of Toshiba CMH08A,LCSQ(J applications of RF diodes.