Obsolete — last-time-buy sourcing for existing BOMs
The 1.5KE110-E3/54: The 1.5KE110-/54 is listed as Obsolete by Vishay.
1500 W peak pulse — clamping at 158 V
The reverse standoff voltage is 89.2 V, and breakdown occurs at a minimum of 99 V — this gives a 10 V window between the working rail and the clamping threshold, enough margin for a 48 V or 72 V bus without nuisance triggering.
DO-201AA axial — through-hole board fit
Supplied in a DO-201AA (DO-27) axial-lead package, the 1.5KE110-/54 mounts through-hole. The tape-and-reel packaging (/54 suffix) suits automated insertion for high-volume assembly. Single unidirectional channel — cathode banded; polarity must be observed during placement.