To increase the resistance against high-voltage flash-over or arc-over of a distributor rotor with a built-in radio noise suppression resistor (5), the radio noise suppression resistor (5) is formed together with the distribution terminal (1) and a central contact terminal (4) in form of a plate (11) in a unitary subassembly, for example by rivet connection of the terminals to end caps (8, 9) on the resistor, the subassembly then being molded into the rotor body (6) during an injection-molding step. To provide for mechanical strength, the resistor preferably includes fiber-reinforced epoxy as a substrate or carrier, or as a jacket. Preferably, the contact plate (11) is placed at a level below that of the resistor (5) and surrounded by an insulating jacket of increasing thickness towards the plate, so that the thickness of insulating material with respect to adjacent grounded or chassis connection elements, such as an attachment flange or screw bushing (17) is increased.