500W Zener TVS in Axial Package
Its 91.2V reverse standoff voltage and 165.1V clamping maximum at 3A define the protection window for 91V nominal rails.
Breakdown and Clamping Margins
Minimum breakdown voltage is 114V, giving a ~23V guard band above the standoff level before the diode starts conducting significantly. The clamping ceiling at 165.1V limits the spike seen by downstream components — useful for telecom or industrial DC buses where transients ride on a 91V line.
It is a through-hole axial device.