1500W peak pulse — sizing the protection for a 185V rail
The 1.5KE220CAHE3_A/D: The 185 V reverse standoff voltage sits below the 209 V minimum breakdown — the device stays transparent on a nominal 185 V DC bus and only conducts when the transient pushes above the breakdown knee. That makes it a fit for under-hood or chassis-mounted ECU power inputs where load-dump, alternator surge, and inductive kickback are the daily threat.
Bidirectional, single-die — one part covers both polarities
A single bidirectional channel protects against positive and negative transients without needing two series diodes. The DO-201AA axial package is a through-hole leaded form — it handles the thermal cycling of power-stage clamping better than a surface-mount equivalent in the same power class.