What the 1500W rating means for your rail
The 1.5KE15CA-B: Reverse standoff voltage of 12.8V means it sits across a 12V bus without conducting in normal operation; the breakdown starts at 14.3V min, so a 12V rail with 10% tolerance stays below the trigger threshold.
Package and temperature envelope
Housed in a DO-201AA / DO-27 axial-lead through-hole package (supplier device package DO-201), the diode mounts into a standard 0.100-inch pitch hole pattern — no reflow profile needed, just a wave or hand-solder step.