1500W peak pulse, AEC-Q101, now obsolete
The 1.5KE18HE3/54: Its 14.5V reverse standoff voltage makes it suitable for protecting 12V automotive rails from load-dump and inductive surge transients.
EOL status and sourcing channel
Vishay has marked the 1.5KE18HE3/54 as Obsolete. For BOM lines that still specify this exact order code, supply is available through independent surplus and broker channels. Each lot is verified for date-code authenticity and RoHS compliance before shipment.
Package and board-fit: DO-201AA axial
Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE18HE3/54 mounts through-hole. The 1.5KE supplier device package code matches the standard axial footprint used across the 1.5KE series, so existing PCB layouts for sibling parts accept this device without board revision. The operating junction temperature range spans -55°C to +175°C, covering the full automotive under-hood thermal profile without derating concerns at the high end.