Device identity and key parametrics
The 1.5KE36C: It is a single bidirectional channel device — the same part handles both positive and negative transients without orientation, simplifying PCB layout for AC or bipolar signal lines.
Package, mounting, and environmental limits
Housed in a DO-201AA / DO-27 axial-lead package (supplier device package DO-201), through-hole mounted. No power line protection feature — this is a general-purpose transient suppressor, not a dedicated rail clamp. The Tape & Reel packaging supports automated insertion for volume builds.
Lifecycle status and sourcing posture
Littelfuse lists the 1.5KE36C as obsolete. No official successor is recorded on this line. The 30.8 V standoff and 1500 W rating are the fit criteria — confirm the clamping voltage (52.4 V max) stays below the downstream device's abs-max rating. Date-code provenance matters on an obsolete part; stock traceability is verified at quote.