DIN Rail Terminal Block Kit
[DRTK]

These things work like a million bucks.
Do yourself a favor... Use the 60 amp terminals (if you don't have a short rail).
The 30 amp terminals have such a tiny screw, and the ferrules are a snug fit. If they are up against a stop block, they are difficult to secure.
I found out the hard way -- it is always better to have a bigger box, and more breathing room...