Obsolete — spot-market sourcing for the 1.5KE180HE3/54
That 146 V standoff means a 150 V nominal rail sees no leakage until the transient exceeds the breakdown threshold.
AEC-Q101 and the automotive temperature envelope
AEC-Q101 qualification certifies the part for automotive stress levels — temperature cycling, high-temperature reverse bias, and humidity. The junction temperature range spans -55°C to +175°C, covering under-hood and engine-bay ambient where the TVS absorbs repetitive load-dump transients. The DO-201AA axial package is through-hole, so the thermal path runs through the lead wires into the PCB pads — the 1500 W rating assumes a 25°C ambient and proper copper land area to sink the pulse heat.
Sourcing reality for a discontinued TVS
The closest functional replacement would be a current-production 1.5KE series part with the same standoff voltage and package — but the AEC-Q101 automotive grade narrows the field.