According to the datasheets, the peak forward voltage is 0.85.The maximum continuous forward current that this device consumes at any given time is about 1.A DC reverse voltage less than 150 must be used for operation.
GSPS1B5H Features
the forward peak voltage is 0.85
GSPS1B5H Applications
There are a lot of Good-Ark Semiconductor GSPS1B5H applications of RF diodes.