Zener clamping at 113 V — the 1.5 kW pulse rating
The 1.5KE82AHE3_A/D: The reverse standoff voltage is 70.1 V — this is the DC rail it protects: a 48 V battery bus or a 60 V intermediate rail sees no leakage at rated voltage. Breakdown starts at 77.9 V minimum, so the device stays transparent below that threshold.
AEC-Q101 and the -55 to 175 °C operating envelope
The operating temperature range spans -55 to 175 °C — the upper end covers under-hood ambient plus self-heating during the pulse event. The junction sees that 175 °C peak only transiently; the axial DO-201AA body conducts heat into the leads and the PCB copper.