Automotive TVS with 1500 W pulse rating
The 1.5KE120AHE3/51: The 102 V standoff means this diode sits across a nominal 100 V or 120 V DC bus without conducting leakage current, then clamps transients to 165 V — protecting downstream electronics rated for that peak. The AEC-Q101 Grade 0 temperature range (-55 to 175 °C) suits under-hood or engine-bay environments where ambient heat cycles are severe.
Through-hole axial package for board integration
Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE120AHE3/51 mounts through-hole — the leads are soldered into plated holes on the PCB. The axial body allows either vertical or horizontal placement, with the cathode band marking polarity. The 1.5KE package footprint is standard across the family, simplifying layout reuse.
Sourcing an obsolete automotive TVS
Vishay has marked the 1.5KE120AHE3/51 as obsolete. For BOM lines already qualified to this order code, supply is maintained through independent distribution — quantities and date codes are confirmed at the time of RFQ. The AEC-Q101 qualification and 1500 W rating remain the key fit criteria; if a board spin is feasible, a parametric cross-search on standoff voltage and package will identify active alternatives.