What the 1.5 kW peak pulse rating means for your protection scheme
The 1.5KE82HE3/54: That 1.5 kW rating tells you the device can absorb a single surge of that energy without failing — but the clamping voltage at the actual peak current is what determines whether the downstream silicon survives. The 73.8 V minimum breakdown voltage means it starts conducting before the rail hits 80 V, leaving margin for a 72 V absolute-maximum downstream regulator.
The full operating junction temperature range is -55 °C to 175 °C, covering cold-crank and hot-soak conditions. The TransZorb construction uses a glass-passivated junction in a DO-201AA (DO-27) axial-lead package. Through-hole mounting keeps the thermal path to the board short, which matters when the 1.5 kW pulse dumps heat into the lead frame.
Sourcing an obsolete part — what to expect
For a BOM line that requires this exact AEC-Q101 TVS, the procurement path is through independent distribution. We source and quote to order against an RFQ — each lot is verified for authenticity and date code before it ships.