Abstract: A spray cooled circuit card cage includes opposed card guides separated by opposed card cage side panels. Each card guide carries a top rail and lower manifold. The manifold provides coolant fluid to a plurality of spray plate assemblies, which direct a spray of coolant over the top surface of the electronic cards carried between the card guides. A VME or other type of electronic back plane is typically attached to the manifolds and a back plane support, and is in electronic communication with the circuit cards.