The 1.5KE10AHE3_A/C: For a 12 V automotive bus, the 8.55 V reverse standoff means it sits idle under normal conditions and only conducts when the line spikes above that threshold. The breakdown voltage range starts at 9.5 V minimum, giving the designer a clear window between the nominal rail and the clamping point. No power-line protection — it is a unidirectional TVS, so it handles positive transients only; a bidirectional part would be needed for AC-coupled lines.
Through-hole DO-201AA — field-swappable with a soldering iron
The DO-201AA axial package is through-hole, so it can be replaced on-site with a basic iron and solder sucker — no hot-air station required.