What the 1500W peak pulse rating means on the bench
The 1.5KE30CAHA0G: The 25.6V reverse standoff voltage is the continuous DC rail it protects; the 28.5V minimum breakdown ensures the device stays off the line under normal operation and only conducts when the transient exceeds that threshold.
Automotive-grade construction and package rework
DO-201AA axial package (DO-27 equivalent) — through-hole, easy to hand-solder or rework with a standard iron. The body is large enough to read the marking without magnification; no fine-pitch risk.