Obsolete — sourcing through independent channels
Littelfuse has marked the 1.5KE6.8-B as Obsolete, meaning the manufacturer no longer produces it. The DO-201 axial footprint is common, so a replacement from another manufacturer with the same package and electrical window is possible but requires BOM-level validation.
Temperature range and deployment context
The through-hole DO-201AA axial package is a legacy form factor; it mounts in boards designed for wave-solder or hand-solder assembly, common in retrofit or long-life industrial equipment where SMD alternatives would require a layout change.
