The invention discloses a component. The component comprises a column-shaped component body and a slab, the slab is located at one side of the outer lateral surface of the component body, the slab is connected to the outer lateral surface of the component body through a lateral surface parallel and opposite to the outer lateral surface of the component body, the first region surrounded by the outer edge of the vertical projection of the component body at one lateral surface of the slab is contained by the outer edge range of the slab, the insulating performance of an electrode of the component body and a metal shell of equipment is satisfied through arranging the slab made of insulating material, the region surrounded by the outer edge of the slab is larger than or equal to the first region surrounded by the outer edge of the component body, and accordingly the minimum creep distance between the electrode and the metal shell of the equipment can be increased without increasing the electric clearance, the equipment space is saved, and the miniaturization and integration of a surge protection module are realized.