The utility model provides a surface-mounted element which includes a main body, the profile of which is cylindrical. The main body includes at least two electrodes which are arrayed sequentially in a spaced manner. An insulating pipe is connected between every two adjacent electrodes in a sealing manner in the at least two electrodes. Every two adjacent electrodes and the insulating pipe between the every two adjacent electrodes form a cavity. The element also includes a cured insulating layer which is attached on the surface at the outer side of the main body and located at one side in the array direction of the electrodes. One surface of the insulating layer, far away from the surfaces of the outer sides of the insulating pipes, is the upper surface of the insulating layer. The upper surface of the insulating layer is on the same plane with the upper edges of the electrodes, or the upper surface of the insulating layer is parallel to and higher than a plane, on which the upper edges of the electrodes are. Through arrangement of the insulating layer, a large flat surface-mounted attachment plane is provided so that mounting of the element is realized in a high-speed and high-precision manner.