1500W automotive TVS — what the ratings mean for the BOM
The 1.5KE100HE3/54 is a 1500W peak pulse power TVS Zener diode from Vishay's automotive-grade TransZorb series, qualified to AEC-Q101 for use in under-hood and chassis-domain electronics where transient immunity is a reliability gate. With an 81V reverse standoff voltage and a 90V minimum breakdown, it protects a nominal 72V or 80V rail — the clamping voltage is 144V at the 10.4A peak pulse current (10/1000µs waveform), so the protected circuit must survive a 144V transient before the TVS clamps.
Lifecycle reality — obsolete, sourced through independent channels
No official pin-compatible successor is recorded from Vishay; a parametric replacement would require verifying the standoff voltage, clamping voltage, and package footprint against the application's transient protection requirements.