A surge-protected coaxial termination includes a metallic outer body, a center conductor extending through a central bore of the outer body, and a spark gap created therebetween to discharge high-voltage power surges. An embodiment may include a wiring board, having a mounting space with a mounting length determined in a first direction and a mounting width determined in a second direction, on at least one surface thereof, and a plurality of integrated circuit packages having a package mounting combination length longer than the mounting length of the wiring board. As the planet gear rotates, the movement of the engagement portion has a radial component relative to the second gear, and the rotational velocity of the second gear is related to the radial position of the engagement portion.