Active production — no lifecycle risk for new designs
The 1.5KE9.1CA: If a sole-source risk concern arises, multiple manufacturers offer parametric cross-references in the same DO-201 footprint — qualify the alternate now to keep the BOM line flexible.
Wide temperature range and bidirectional protection
No power line protection rating listed — this is a general-purpose transient suppressor, not a dedicated AC mains protector. Use it on DC power buses, signal lines, and low-voltage AC circuits where the standoff and clamping levels match the rail.