D-arabinono-1,4-lactone + O2 = dehydro-D-arabinono-1,4-lactone + H(+) + H2O2 Cofactor biosynthesis; D-erythroascorbate biosynthesis; dehydro-D-arabinono-1,4-lactone from D-arabinose: step 2/2. Membrane-embedded. Belongs to the oxygen-dependent FAD-linked oxidoreductase family.