Abstract: An electrical device for mounting on a circuit board, such as an inductor or a transformer. The device contains first and second core halves which can be mated to one another. Each half contains an outer skirt attached to a back-plane, and a center core component which is attached to the back-plane in a position which is perpendicular to the back-plane and to the circuit board, when mounted. The center core component has a primary axis and a secondary axis, the secondary axis having a smaller dimension than the primary axis, and a cross-section with a ratio of length of primary axis to length of secondary axis of 1.1:1 to 3.5:1. The outer skirt, back-plane, and center core component all contain magnetic material, e.g. ferrite. A bobbin having a hollow center section with a cross-section of similar shape to the cross-section of the center core components is attached to first and second flanges, each of which flanges has wire mounting posts on its bottom edge.