It carries 6A per contact at 125V, with the current rating typical for a standard-density DB-9 — the limiting factor is pin density, not contact capability. The steel shell with tin plating provides basic EMI shielding, and the female screwlock (4-40) on the mating side accepts jackscrews from the plug for a vibration-resistant mate.
The gold flash contact finish on phosphor bronze contacts suits occasional mating cycles. For applications requiring frequent connect/disconnect duty, a thicker gold plating is preferred.