Clamping performance for a 85.5V rail
The 1.5KE100CA: That 137V ceiling is what the downstream silicon sees; if the load's absolute maximum rating is above that, the protection margin is adequate.
Through-hole axial package for board-level transient suppression
Housed in a DO-201AA / DO-27 axial-lead package (supplier device package DO-201), the 1.5KE100CA is a through-hole part that inserts into a standard 0.100-inch pitch footprint — no reflow profile needed, just a wave or hand-solder step. The junction temperature range spans -55°C to 175°C, covering military and industrial thermal extremes without derating the power handling at the high end.