It looks like it is starting to saturate at 260A (130%), which is pretty much the bias current (510v*70a/144v), and beyond rated current, but otherwise it is a nice inductor. Interesting how they specify things.
The
datasheet shows it is dual coil, does it have an air gap (not needed if it is meant as common mode choke AFAIK, definately needed as a single ended choke)? Do you know if it is 300uh/200A per coil?