Automotive-grade transient suppressor — now obsolete
The 1.5KE82CHE3/54 is a 1500 W peak-pulse Zener TVS diode from Vishay's TransZorb® Automotive series, qualified to AEC-Q101 for under-hood and chassis-domain transient protection. Its 66.4 V reverse standoff and 118 V clamping at 12.7 A (10/1000 µs pulse) make it a fit for 48 V and 60 V bus clamping in engine-control and body-electronics modules.
What the key ratings mean for your BOM
Bidirectional single-channel topology — the same device clamps both polarities, so a single part covers reverse-battery and load-dump events without external bridge diodes. Breakdown voltage min 73.8 V ensures the avalanche threshold sits above the 66.4 V standoff, giving margin against steady-state rail ripple. The DO-201AA axial package (1.5KE supplier device code) is a through-hole leaded form that handles the thermal cycling of engine-bay solder joints better than a surface-mount DO-214AB in the same duty.
Lifecycle reality — obsolete, sourced through surplus channels
Vishay lists the 1.5KE82CHE3/54 as obsolete.