形成为从下层的螺旋形状的第一环状导体（L1A，L1b中，L1C L1D）到上层，第一环状导体（L1E，L1F，L1G，L1H）形成以螺旋形状从顶部到所述下 那里。 以螺旋形状形成在第二环状导体（L2a而，L2b构成，L2c的，L2D）从下层到上层，形成在（L2E，L2F L2G，有效L2h）的第二环形导体是螺旋状从顶部到所述下 是的。 第一环形导体和第二环状导体交替配置在层叠方向上。 第一环形导体和第二环状导体相邻于在层方向上相互圆形导体，所述主体部分被设置成不以在俯视图中重叠。 此结构中，正常模式信号的损失小，共模噪音的高去除能力，构成了小共模扼流线圈。

First annular conductor (L1a, L1b, L1c, L1d) is formed in a spiral from the lower to the upper layer, the first annular conductor (L1e, L1f, L1g, L1h) is formed in a spiral shape from the top to the lower there. The second annular conductor (L2a, L2b, L2c, L2d) is formed into a spiral shape from the lower to the upper layer, the second annular conductor formed on the (L2e, L2f, L2g, L2h) is spirally from the top to the lower It is. The first annular conductor and a second annular conductor are alternately arranged in the stacking direction. First annular conductor and a second annular conductor is a circular conductor adjacent to each other in the layer direction, the main portion is disposed so as not to overlap in plan view. With this structure, the loss of the normal mode signal is low, high removal capacity of the common mode noise, constitute a small common mode choke coil of.