Obsolete 1.5kW Zener TVS — what it means for your BOM
Littelfuse has marked the 1.5KE530C-B as obsolete. That means the factory no longer produces it, so any new build or repair stock comes from surplus or distributor inventory — not a fresh wafer run. It clamps at 761.25 V max and has a reverse standoff voltage of 477 V, with a breakdown minimum of 477 V. Peak pulse current is 2.1 A under the same 10/1000 µs condition — that is the current the diode can sink during a transient before the clamping voltage rises.
DO-201 axial package — field-swap friendly
Through-hole mounting means it is a hand-solderable swap on a board — no hot-air station needed, just a soldering iron and a steady hand.
Sourcing an obsolete TVS — what to expect
Because the 1.5KE530C-B is obsolete, there is no manufacturer lead time to count on. Availability is lot-specific and confirmed at quote time through independent distribution channels. No official successor is listed on the record. If you need a drop-in replacement, the closest functional match would be another 1.5KE-series bidirectional Zener with a similar standoff voltage — but pin-compatibility is not guaranteed without checking the full datasheet.