Clamping parameters and fit for a 30.8 V rail
The 1.5KE36A/54: Its 30.8 V reverse standoff voltage means it sits across a 24 V or 28 V DC bus without conducting in normal operation; clamping begins at 34.2 V breakdown and hard-clamps at 49.9 V maximum, handling 30.1 A of peak pulse current. This is the rail-protection decision point — if the transient exceeds 49.9 V, the TVS shunts the energy to ground before the downstream regulator sees it.
Obsolete — sourcing through surplus channels
Vishay lists this part as obsolete. The part is available through independent surplus and auction-lot channels; quantities are lot-specific, date-code spreads vary, and pricing is confirmed at RFQ.
Through-hole package and temperature range
That temperature grade suits it for power supplies, industrial controls, and telecom rectifiers where the ambient inside the enclosure can exceed 85°C. The axial leads allow point-to-point wiring or PCB through-hole mounting — no surface-mount reflow profile needed.