REACTOR

Provided is a reactor that can prevent a temperature sensor from being attached to a wound portion of a coil in a wrong direction. The reactor includes a temperature sensor having a sensor main portion attached to an outer peripheral surface of a wound portion and a wire extending from the sensor main portion. A sensor housing portion houses the sensor main portion. The sensor main portion has a detection surface facing the wound portion and a projecting portion protruding from a back surface of the sensor main portion opposite of the detection surface. The sensor housing portion has a pair ofside wall portions opposing respective side surfaces of the sensor main portion. A height of a portion of the sensor main portion that has the projecting portion is larger than a width of that portion and larger than the distance between the side wall portions. 本发明提供种电抗器，能够防止温度传感器相对于线圈的卷绕部的安装方向的错误。电抗器具备：具有卷绕部的线圈；及在卷绕部的内外配置的磁性芯，电抗器具备：温度传感器，具有在卷绕部的外周面安装的传感器主体部和从传感器主体部拉出的配线；及传感器收纳部，收纳传感器主体部，传感器主体部具有面向卷绕部的检测面和从检测面的相反侧的背面突出的突