I'm interested in setting up a secondary CU on the output of a UPS, to
run assorted loads around the house.
(Emergency lighting, network gear, ...)
However, I'd like some small MCBs to cut out the various low-limit circuits
at some worthwhile point.
A 6A MCB is essentially useless, as the UPS will trip off way before then.
0.5A, 1A, 2A might be of use.

A quick search does not reveal sources of these.
Any thoughts?