Obsolete but spec'd — what the ratings mean for a replacement search
The 1.5KE30HE3/73: It is officially listed as obsolete, meaning new designs should not specify this exact order code — but for existing BOM lines in sustainment, the parametric profile is what matters for cross-referencing. The reverse standoff voltage is 24.3 V, and breakdown occurs at a minimum of 27 V — so it protects a 24 V nominal rail against transients that exceed the normal operating envelope.
Automotive temperature grade and deployment context
The AEC-Q101 qualification means it passed the stress tests (H3TRB, temperature cycling, ESD) that automotive Tier-1s require for PPAP submission. The DO-201AA axial package is a through-hole format — rework-friendly, but the lead spacing and body diameter differ from surface-mount alternatives. Any replacement must match the board's hole pattern and the 1.5KE footprint.
Sourcing an obsolete automotive-grade TVS
With the 1.5KE30HE3/73 marked obsolete, the primary sourcing channel is independent surplus and broker inventory. No official successor order code is recorded in the lifecycle data — the replacement path is a parametric match within the same 1.5KE family or a functionally equivalent AEC-Q101 TVS from another manufacturer. Available to quote against an RFQ through our independent distribution network. Lot traceability and date code confirmation are provided at quote time; the AEC-Q101 marking on the body is a first-line authenticity check.