1500 W peak pulse — what the rating means for the circuit
The 1.5KE8.2AHE3/51: The reverse standoff voltage is 7.02 V, so the device stays transparent on a nominal 5 V or 6 V rail and only conducts when the line exceeds the breakdown threshold of 7.79 V minimum. For a 12 V automotive bus, this part triggers well below the nominal rail — it is sized for low-voltage supply protection, not the main 12 V line.
AEC-Q101 and the automotive deployment envelope
The operating junction temperature range is -55°C to 175°C, which covers under-hood and engine-bay environments where ambient temperatures can exceed 125°C. The DO-201AA axial-lead package is a through-hole form factor — it suits point-to-point wiring on terminal strips or PCB mounting where the lead bend radius is controlled to avoid cracking the glass passivation.