Abstract: A particular embodiment comprises:a rigid body which is closed in watertight manner at both ends;six thermally conductive rigid receptacles each having a face which is complementary in shape to the shape of the inside wall of the body, the receptacles containing electronic circuits;layers of thermally conductive flexible materials disposed between the wall and the faces of the receptacles;supports each supporting two receptacles;a fixed ring integral with the body;a removable ring fixed to the fixed ring; andfixing devices each including a screw, resilient washers, and an insulating sleeve, thereby exerting outwardly directed radial forces when the screws are screwed radially into the removable ring.The housing is suitable for the repeaters of undersea connection cables.