Electron transfer component of 2-halobenzoate 1,2-dioxygenase system. H(+) + NAD(+) + 2 reduced [2Fe-2S]-[ferredoxin] = NADH + 2 oxidized [2Fe-2S]-[ferredoxin] Binds 1 FAD per subunit. Binds 1 [2Fe-2S] cluster per subunit. Xenobiotic degradation; benzoate degradation via CoA ligation. Monomer. It is part of 2-halobenzoate dioxygenase two component enzyme system. The other component is a dioxygenase component consisting of 3 large (CbdA) subunits and 3 small (CbdB) subunits. Belongs to the bacterial ring-hydroxylating dioxygenase ferredoxin reductase family.