Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE20 mounts through-hole and is supplied on Tape & Reel. The DO-201 body is the standard footprint for 1.5 kW TVS diodes — the lead diameter and body length match the existing PCB layout for any 1.5KE-series part, so swapping in the 1.5KE20 requires no board spin if the hole pattern is already there.
Temperature range and deployment context
The wide temperature margin means the clamping voltage and leakage current stay within spec across the full range — critical for a protection diode that must not become a load itself at high temperature.
Lifecycle reality — obsolete, but available through independent channels
Littelfuse lists the 1.5KE20 as Obsolete.