Hi,

Can someone let me know what the OEM part # for a replacement power adapter for RB3011UiAS is? Thanks!

It should be one of these two options.

I would advise against the second one (24V*0.8A=18W) as it is weaker than original (24V*1.2A=28.8W).
Original is designed to handle both router (up to 10W) and PoE out (up to 30V*0.6A=18W) at the same time.

If you are certain you will never use PoE-out on your RB3011, then both alternatives should be fine.