1500 W axial TVS for legacy rail protection
The Littelfuse 1.5KE47-B is a 1500 W peak-pulse-power Zener TVS diode in the through-hole DO-201AA (DO-27, axial) package. It clamps a 40.2 V reverse standoff rail at 68.04 V while handling a 23.5 A peak pulse current (10/1000 µs waveform). The 42.35 V minimum breakdown voltage sits above the 40.2 V standoff, so the device stays transparent during normal line operation and only conducts when the transient exceeds the threshold.
Littelfuse lists the 1.5KE47-B as Obsolete. Availability and pricing are confirmed at RFQ against the specific BOM quantity.
The DO-201 axial body is a standard through-hole footprint — it mounts into a drilled PCB or terminal strip and is often paired with a series fuse or PTC for coordinated overvoltage/overcurrent protection.