1500W peak pulse in a DO-201 axial body
The 1.5KE43A A0G: Its 36.8V reverse standoff voltage means it sits across a 36V rail without conducting leakage, then avalanches at a minimum 40.9V breakdown to clamp transients at 59.3V maximum. The 26A peak pulse current at that waveform tells you the diode can absorb a substantial surge before the junction temperature hits the 175°C absolute limit.
Clamp voltage and operating margin
With a 36.8V standoff, this part suits 24V to 36V DC rails where the normal operating voltage stays well below the avalanche knee. Power line protection is not specified — this is a signal or DC rail protector, not a mains-side suppressor. The single unidirectional channel handles one polarity; for AC or bidirectional rails you would need two devices back-to-back or the bidirectional variant in the same 1.5KE family.
Through-hole DO-201AA footprint
The DO-201AA axial package (also known as DO-27) is a standard through-hole form factor with 0.042-inch diameter leads — it mounts into a 0.040-inch plated through-hole on a typical 1.6mm PCB. The body length is about 9.1mm, so it fits in standard 10mm pitch axial lead spacing. Tape and box packaging (TB) suits hand-insertion or selective wave solder; the leads are tin-plated for solderability.