1500 W peak pulse, AEC-Q101 qualified, now obsolete
The 1.5KE180HE3/73: Its 146 V reverse standoff voltage and 258 V clamping maximum at 5.8 A peak pulse current define the protection window for a 120 V nominal DC rail — the diode stays transparent below the standoff and clamps transients to a safe level above it. The DO-201AA axial-lead package is a through-hole form factor that provides robust mechanical attachment in high-vibration environments compared to surface-mount alternatives.
Obsolete — sourcing through independent channels
Vishay has marked the 1.5KE180HE3/73 as Obsolete. The tape-and-box packaging is the original factory format; parts may arrive in cut tape or bulk depending on the lot.
Breakdown and clamping window
The minimum breakdown voltage is 162 V, ensuring the diode starts conducting before the rail exceeds the safe operating area of downstream components. The 258 V maximum clamping voltage at 5.8 A peak pulse current sets the worst-case transient voltage the protected circuit must survive — a 120 V rail with a 100 V margin to the clamp gives headroom for load-dump or inductive kickback events.