Can we use AC MCB on DC Circuit or Is it good choice of using AC MCB instead of DC MCB

You can not use AC MCB on the DC Circuit. The AC MCBs are designed to break the fault current at shorter intervals, but DC has a longer fault current hance AC MCB does not have the ability to break the DC Current. Link: https://www.electrical4u.net/relay/can-we-use-ac-mcb-on-dc-circuit-or-in-place-of-dc-mcb/ #AC_MCB, #DC_MCB