Peak pulse power and the protection window
The 1.5KE33A-E3/54: The reverse standoff voltage of 28.2V means the diode does not conduct at normal operating voltage; breakdown starts at 31.4V minimum, and clamping is guaranteed at 45.7V maximum with a peak pulse current of 32.8A.
Package and rework considerations
Housed in a DO-201AA (DO-27) axial through-hole package, this part is straightforward to hand-rework — the body is large enough to grip with standard tweezers, and the axial leads give good thermal access for a soldering iron or hot-air station without cooking adjacent components.