Through-hole DO-201 package
The 1.5KE300CA A0G: Housed in a DO-201AA / DO-27 axial leaded package (supplier device package DO-201), the part mounts through-hole. The 1.5KE series footprint is standard — the axial leads insert into a 1.0 mm (0.040 in) diameter plated through-hole on a typical PCB, with a lead spacing of 0.375 in (9.5 mm) per the JEDEC DO-201 outline.
The 175°C upper limit means derating at high ambient is required — at 125°C ambient the peak pulse power typically derates to 75% of the 25°C rating per the TVS derating curve common to this package class.