What the 1500W rating means for your protection budget
The 1.5KE36AHE3_A/D: The 30.8V reverse standoff voltage is the DC operating rail it protects; as long as the supply stays below that, the diode draws negligible leakage. Breakdown occurs at 34.2V min, so there is a 3.4V window between normal operation and the start of conduction — tight enough for a 24V nominal automotive bus that sees load-dump transients.
Automotive-grade construction and temperature range
Housed in a DO-201AA (DO-27) axial-lead through-hole package, it mounts into a standard 0.100-inch pitch hole pattern. The axial leads carry the full pulse current; the lead-to-body interface is the thermal bottleneck, so keep the lead length short and the solder fillet generous to pull heat into the PCB copper.