1500W peak pulse, 414V clamp — the rail-killer spec
The 1.5KE300CA-TP: That 414V max clamping voltage at Ipp tells you where the surge gets shunted — if your 256V rail sees a transient that tries to push past 414V, this part folds the spike to ground before it reaches downstream silicon. The bidirectional channel means a single device protects both polarities — no need to pair two unidirectional parts back-to-back on an AC line or a floating DC rail.
DO-201AE axial — what the package tells the repair bench
Through-hole DO-201AE axial package — the same body as the classic 1.5KE series. The leads handle the thermal pulse of a 1500W surge; the junction temperature range spans -55°C to 175°C, so it lives in a hot power supply or an outdoor telecom enclosure without derating at the low end. Tape and reel or cut tape packaging means you can order exactly the quantity for a repair or a small production run without buying a full reel. The axial leads solder into plated through-holes on a standard 0.100-inch pitch — no footprint change from the rest of the 1.5KE family.