1500W peak pulse in an axial DO-201 package
The 1.5KE47: The 68.04V clamp means this part holds transients below that level for a 40.2V nominal rail — a 48V telecom bus or a 36V industrial supply gets protection without the clamp voltage exceeding the downstream device's abs-max rating. The DO-201AA axial package (also known as DO-27) is through-hole mounted, suited for point-of-entry protection on power lines where board space allows a leaded part.
Obsolete — sourced through independent channels
Littelfuse lists the 1.5KE47 as Obsolete.