1500 W peak pulse, 158 V clamp — obsolete but spec-verified
The 1.5KE110HE3/73: Its 158 V maximum clamping voltage at 9.5 A peak pulse current defines the protection ceiling for the downstream circuitry — any transient that drives the line above 158 V is clipped to that level, provided the energy stays within the 1500 W rating. The reverse standoff voltage is 89.2 V, meaning the diode draws negligible leakage below that threshold and only begins conducting significantly when the transient exceeds the minimum breakdown voltage of 99 V. This gives a 10 V window between normal operating rail and the onset of clamping — adequate for 12 V or 24 V automotive buses with some margin for steady-state ripple.
AEC-Q101 qualification and the TransZorb® family
The TransZorb® series is Vishay's branded TVS platform, optimized for repetitive surge clamping in harsh environments. The operating junction temperature range spans -55°C to +175°C, covering the full under-hood thermal profile. A single unidirectional channel protects one signal or power rail; the axial DO-201AA (DO-27) package is through-hole mounted, suited for point-of-entry protection on a PCB or terminal block.
Obsolete — sourcing through independent channels
Vishay has marked the 1.5KE110HE3/73 as Obsolete. No official successor order code is recorded in the lifecycle data. The base product number is 1.5KE110, and the /73 suffix denotes the Tape & Box (TB) packaging format. When sourcing, confirm the date code and lot traceability with the supplier, as obsolete parts may come from end-of-life inventory or surplus stock.