1500W peak pulse in a DO-201 axial body
The 1.5KE300A A0G: Its 256V reverse standoff voltage means the diode stays transparent on a 240VAC or 250VDC rail, only clamping when a transient pushes the line above 285V breakdown (minimum). At the full 3.8A peak pulse current, the clamp holds at 414V maximum, protecting downstream silicon from overvoltage. The DO-201AA axial package (also known as DO-27) is a through-hole form factor, easily hand-soldered or wave-soldered into a PCB or terminal block.
No pin-compatible second-source or successor is listed, but the 1.5KE family is widely cross-referenced across TVS manufacturers.