The 1.5KE47A-TP: That clamp ceiling is the number the downstream silicon sees — if the bus is a 48 V telecom rail or a 42 V automotive load-dump protected line, the 64.8 V clamp stays within the typical 80 V abs-max of downstream DC-DC converters and linear regulators. No power line protection (the device is intended for signal or low-impedance DC rails, not mains AC).
Package and procurement posture
Housed in a DO-201AE axial-lead through-hole package (supplier device package DO-201AE). The leaded format is straightforward for hand-assembly or wave-solder — no moisture sensitivity level to track, no bake-out before reflow. Offered on tape and reel or cut tape; the reel quantity suits volume builds, the cut tape works for prototype or MRO replenishment.