1500 W peak pulse in a DO-201AA axial package
The 1.5KE13C-E3/73: The 19 V clamping voltage means a 12 V rail sees a hard clamp before the downstream DC-DC or load switch sees damaging overvoltage — the 10.5 V standoff keeps it out of conduction during normal operation.
Through-hole fit and temperature range
Housed in a DO-201AA (DO-27) axial leaded package, the 1.5KE13C-/73 is a through-hole part — the leads insert into plated through-holes on the PCB and are wave-soldered. The single bidirectional channel protects a single signal or power rail against both positive and negative transients, eliminating the need for two unidirectional devices in anti-series.
Obsolete — sourcing through independent channels
Vishay lists the 1.5KE13C-/73 as Obsolete. The 1500 W peak pulse rating and bidirectional configuration are the fit criteria to confirm against the original design.