A reactor that can measure the temperature of the magnetic core is provided. The reactor includes an assembly having a magnetic core and a coil that has a winding portion, and a temperature sensor that measures the temperature of the reactor. The magnetic core has an inner core portion that is inserted into the winding portion, and a sensor disposition groove is formed in an outer peripheral face of the inner core portion and is disposed inside the winding portion. The temperature sensor is provided inside the sensor disposition groove. According to this configuration, it is possible to precisely measure the temperature of the magnetic core while the reactor is operating.

An inductor component includes a core base material, a magnetic body in the core, a first conductor pattern formed on primary surface of the core, a second conductor pattern formed on secondary surface of the core, and through-hole conductors formed in through holes through the core such that the conductors are connecting the first and second patterns. The first pattern, second pattern and conductors are positioned to form an inductor such that the magnetic body is positioned on inner side of the inductor, each conductor has a diameter k1, each pattern has conductor thickness in range of 50 μm to 200 μm and has line patterns each having width w1 and separated by line separation distance w2, and a ratio of cross-sectional area of each line pattern to cross-sectional area of each conductor along the diameter k1 in direction of the width w1 is in range of 0.8 to 2.0.

A transformer includes a core having first and second yokes and at least one leg extending between the first and second yokes. The at least one leg includes a coil assembly mounted thereto between the first and second yokes. An annular end barrier is provided at one or both ends of the coil assembly to provide a barrier between the adjacent yoke and a high voltage winding of the coil assembly.

A power inductor includes a winding and a metal magnetic powder core. The metal magnetic powder core is configured to support the winding, and the winding uses a metal conductive sheet. During assembly, the metal magnetic powder core is integrated with the winding through pressing, the metal magnetic powder core wraps the winding, and the metal magnetic powder core is insulated from the winding. The winding has a first pin and a second pin, and the first pin and the second pin are exposed on different surfaces of the metal magnetic powder core. Pins are separately disposed on two different surfaces of the power inductor. In addition, the winding is formed by integrally pressing the metal conductive sheet and the metal magnetic powder core.

A magnetic assembly includes a multilevel lamination or metallization structure with a core dielectric layer, dielectric stack layers, a high permittivity dielectric layer, and first and second patterned conductive features, the dielectric stack layers having a first relative permittivity, the high permittivity dielectric layer extends between and contacting the first patterned conductive feature and one of the dielectric stack layers or the core dielectric layer, the high permittivity dielectric layer has a second relative permittivity, and the second relative permittivity is at least 1.5 times the first relative permittivity to mitigate dielectric breakdown in isolation products.

An inductor component includes an element body, a coil in the element body, and a non-magnetic insulation layer covering at least part of the coil. The element body includes first and second magnetic layers laminated in order in a first direction. The coil includes a small-turn inductor wiring of 0.5 or less turns extending along a plane orthogonal to the first direction between the first and second magnetic layers. In a first cross-section orthogonal to an extending direction of the small-turn inductor wiring, the small-turn inductor wiring has a top surface facing in the first direction, a bottom surface facing in a second direction opposite from the first direction, a first side surface facing in a third direction orthogonal to the first direction, and a second side surface facing in a fourth direction opposite from the third direction.

A multilayer coil component includes an element body, a coil disposed in the element body, and an external electrode disposed in the element body and electrically connected to the coil. The element body includes a principal surface that is a mounting surface, and an end surface positioned adjacent to the principal surface and extending in a direction crossing to the principal surface. The external electrode includes an underlying metal layer and a conductive resin layer. The underlying metal layer is formed on the principal surface and the end surface. The conductive resin layer is formed to cover the underlying metal layer. A thickness of the conductive resin layer at an end positioned above the principal surface of the underlying metal layer is equal to or greater than 50% of a maximum thickness of a portion positioned above the principal surface of the conductive resin layer.

Provided are a coupled inductor and a power module including the coupled inductor. A coupled inductor includes: a magnetic core, a first winding and a second winding, where a first passage is formed in the magnetic core; a part of the first winding and a part of the second winding pass through the first passage, and the first winding crosses with the second winding outside the first passage. Another coupled inductor includes: a magnetic core, a first winding and a second winding, where the magnetic core has a first passage and a second passage in parallel, both run through the magnetic core from one end face thereof to another opposite end face, where the first winding and the second winding both penetrate the first passage and the second passage, such that differently-named terminals of the windings are located on the same end face of the magnetic core.

One object of the present invention is to provide a compact coil component with superior characteristics. An electronic component according one embodiment includes an insulator and a coil portion. The insulator is formed of a non-magnetic material. The insulator includes a width direction in a first axial direction, a length direction in a second axial direction, and a height direction in a third axial direction. The coil portion includes a circumference section. The circumference section is wound around the first axial direction. The coil portion is arranged inside the insulator. The first ratio of a height to a length of the insulator is 1.5 times or less of a second ratio of a height between first inner peripheral portions of the circumference section along the third axial direction with respect to a length between second inner peripheral portions of the circumference section along the second axial direction.

A coil component includes a support substrate, a coil portion disposed on at least one surface of the support substrate, a magnetic body, in which the support substrate and the coil portion are disposed, having a through-portion penetrating through a center of the coil portion, a nonmagnetic layer disposed below the through-portion, and an insulating layer disposed between the nonmagnetic layer and the through-portion.