GO:0015362

Catalysis of the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: dicarboxylate(out) + Na+(out) = dicarboxylate(in) + Na+(in). In high affinity transport the transporter is able to bind the solute even if it is only present at very low concentrations. [TC:2.A.47.1.4]