Part of the chlorobenzene dioxygenase system that catalyzes the dihydroxylation of a range of aromatic compounds, including chlorinated benzenes and toluenes, and dinuclear aromatics such as biphenyl and dibenzo-p-dioxin. Binds 1 [2Fe-2S] cluster per subunit. Aromatic compound metabolism. This dioxygenase system consists of four proteins: the two subunits of the oxygenase component (TecA1 and TecA2), a ferredoxin (TecA3) and a ferredoxin reductase (TecA4). Belongs to the bacterial ring-hydroxylating dioxygenase ferredoxin component family.