According to the datasheets, the peak forward voltage is 1.1.The maximum continuous forward current that this device consumes at any given time is about 1@Ta=100C.A DC reverse voltage less than 240 must be used for operation.
GRP-A-DATA-JAN1N3611 Features
the forward peak voltage is 1.1
GRP-A-DATA-JAN1N3611 Applications
There are a lot of Microsemi GRP-A-DATA-JAN1N3611 applications of RF diodes.