A high current-rectifier arrangement comprising a movable contact body which is of substantially piston-like structure and arranged with radial play in a cylinder-like compartment or chamber formed in an associated contact element and surrounded at its periphery by a connection line which bridges the radial play to the inner wall of the compartment. Furthermore, cooling agent-channel means of such contact body are arranged in offset relationship at the periphery thereof with respect to the connection line and sealingly connected with cooling agent-channels provided in the connection element.