Obsolete — sourcing through independent channels
The 1.5KE15 is listed as Obsolete by Littelfuse.
1500W peak pulse — the protection envelope
The clamping voltage at that peak current is 22.26V, with a peak pulse current of 71.7A. The reverse standoff voltage is 12.8V, meaning the diode begins conducting above that DC level and clamps transients to 22.26V maximum. Breakdown voltage range is 13.55V minimum, ensuring the device triggers before the protected circuit's absolute maximum rating is reached. Unidirectional — one channel, suited for DC rail protection where polarity is fixed. No power line protection rating, so it is not intended for AC mains surge suppression.
Through-hole DO-201 axial — board-fit note
Packaged in a DO-201AA / DO-27 axial leaded through-hole package, supplier device package DO-201. The through-hole mounting suits point-to-point wiring or PCB layouts where a soldered axial lead provides mechanical retention under vibration. Operating junction temperature range is -55°C to 175°C, covering industrial and under-hood automotive ambient conditions without derating.