An inductor winding comprising: first, second, and third arms ; a middle portion extending between and connected to at least two of the first, second, and third arms and arranged to support an inductor core to be mounted thereon; and first, second, and third legs extending downwardly from the first, second and third arms , respectively, and arranged to be mounted on a circuit board; wherein the first, second, and third legs are arranged to provide three-point contact with the circuit board; and the inductor winding is arranged to provide a space between a bottom surface of the inductor core when mounted on the middle portion and an upper surface of electronic components mounted on the circuit board; the inductor core has a cuboid shape including the bottom surface, a top surface opposite to the bottom surface, a pair of opposite first side surfaces and a pair of opposite second side surfaces, the first and second side surfaces connecting the top and bottom surfaces; the first and second arms are arranged to be parallel to one another and to the first side surfaces of the inductor core ; the third arm is connected to an end of the second arm and a direction in which the third arm extends is perpendicular to the direction in which the second arm extends so that the third arm is arranged to be parallel to one of the second side surfaces of the inductor core ; and the middle portion is arranged to extend parallel to the top surface of the inductor core and in a direction perpendicular to a direction in which the first and second arms extend and parallel to the direction is which the third arm extends, so that all arms comprised in the inductor winding respectively are arranged to be parallel to the respective side surfaces of the inductor core. first, second, and third arms ; a middle portion extending between and connected to at least two of the first, second, and third arms and arranged to support an inductor core to be mounted thereon; and first, second, and third legs extending downwardly from the first, second and third arms , respectively, and arranged to be mounted on a circuit board; wherein the first, second, and third legs are arranged to provide three-point contact with the circuit board; and the inductor winding is arranged to provide a space between a bottom surface of the inductor core when mounted on the middle portion and an upper surface of electronic components mounted on the circuit board; the inductor core has a cuboid shape including the bottom surface, a top surface opposite to the bottom surface, a pair of opposite first side surfaces and a pair of opposite second side surfaces, the first and second side surfaces connecting the top and bottom surfaces; the first and second arms are arranged to be parallel to one another and to the first side surfaces of the inductor core ; the third arm is connected to an end of the second arm and a direction in which the third arm extends is perpendicular to the direction in which the second arm extends so that the third arm is arranged to be parallel to one of the second side surfaces of the inductor core ; and the middle portion is arranged to extend parallel to the top surface of the inductor core and in a direction perpendicular to a direction in which the first and second arms extend and parallel to the direction is which the third arm extends, so that all arms comprised in the inductor winding respectively are arranged to be parallel to the respective side surfaces of the inductor core. <EOS>