The peak forward voltage on the datasheets is 1.1.This device can handle reverse voltages within the range of 70 with a peak RMS value of 70 .Maintaining the forward voltage of a system above 1.1(V) is recommended.Based on its applicable specifications, this device operates at 100 V peak reverse voltage.
RBU402M Features
the forward peak voltage is 1.1 the peak RMS reverse voltage range of 70
RBU402M Applications
There are a lot of Rectron RBU402M applications of RF diodes.