A resistance pattern and a pair of internal electrodes are formed on a main face of a cuboidal insulating substrate. The pair of internal electrodes are connected to opposite end portions of the resistance pattern. A surface glass film is formed to cover the entire main face including a pair of lead wires and a protective film. The pair of lead wires are bonded to the internal electrodes and protrude outward from the insulating substrate. The protective film is formed on the resistance pattern. The surface glass film extends over a region covering respective upper-side faces of the insulating substrate adjacent to the main face. The total dimension (T+D) is (T+D)≈W. T: a thickness of the insulating substrate, D: a wire diameter of each of the lead wires, W: a width of the insulating substrate along a lateral direction.