My males are pretty indifferent to the babies. They tolerate them, but don't really care for them. They walk on them and pretty much act like the babies aren't even there. I haven't ever had a male kill and eat babies.
I am producing a few hundred rats per week now and I have some colonized racks set up and this has been my experience.
I used to separate my moms and let them raise the babies up in their own tubs, but it is way way way too time consuming and it takes up way way way too much space when you start producing larger numbers of rodents.