1500 W peak pulse — what it means for real faults
The 1.5KE13A: This power rating is the product of the clamping voltage and the peak current at that waveform — a shorter pulse (e.g. 8/20 µs) allows a higher peak current, while a longer transient derates the capability. For a 13 V DC bus, the 11.1 V standoff voltage leaves margin below the rail tolerance, so the diode stays off during normal operation and only conducts during the transient.
DO-201 axial package and board integration
Housed in a DO-201AA (DO-27) axial-lead through-hole package, the 1.5KE13A mounts into a 1.1 mm diameter hole on a standard PCB or terminal block. The axial leads carry the full surge current; the body diameter and lead spacing determine the creepage distance for the 18.2 V clamping level.