The P6KE6.8ARL: No authorized-channel stock exists; the only sourcing path is through independent distribution on a per-RFQ basis. The axial through-hole package and the 600 W peak pulse rating mean this part is a legacy BOM line — any new-design requirement should evaluate an active successor.
600 W clamp at 10.5 V — surge sizing for a 5.8 V rail
With a reverse standoff voltage of 5.8 V max and a clamping voltage of 10.5 V at 57 A peak pulse current, this unidirectional Zener TVS absorbs a 600 W surge. The 57 A Ipp is the current the device can shunt before the clamp voltage rises to 10.5 V — the margin between the rail and the clamp sets the protection headroom.
Through-hole axial package — the lead bend and hole diameter on the existing PCB must match the body dimensions; any replacement candidate in a surface-mount package would require a layout change.