A capacitor assembly including at least one capacitor each having a first end and a second end spaced apart in a longitudinal direction, and a first terminal and a second terminal located at the first end of the capacitor, the first end being provided with a first surface, and the second end being provided with a second surface; a heat sink having a first cooling surface; and a connection system connecting the at least one capacitor heat conductively to the heat sink such that the second surface of each of the at least one capacitor is in heat conductive connection with the first cooling surface. The connection system is to in contact with the first surface of each of the at least one capacitor.

An apparatus for monitoring a power capacitor having a housing with a housing interior to be gas-tightly closed off at a housing opening, includes a sensor device outputting a signal as a function of a gas pressure in the housing. An adapter mechanically connects the sensor device to the housing at the housing opening and fluidically connects it to the housing interior. The adapter has a cylindrical adapter body divided into a plurality of functional longitudinal sections and a feed-through for the fluidic connection extending over the plurality of longitudinal sections. A first longitudinal section, disposed in a region of the housing opening after connecting the adapter to the housing, caps or closes off the feed-through in a plane perpendicular to a longitudinal axis of the adapter body and fluidically connects it to the housing interior in at least one plane parallel to the longitudinal axis.

A solid electrolytic capacitor that includes: a valve-action metal substrate including a porous portion at a surface thereof; a dielectric layer on the porous portion; a solid electrolyte layer on the dielectric layer; a conductive layer on the solid electrolyte layer; and a cathode lead-out layer on the conductive layer. When viewed in a thickness direction, the solid electrolyte layer includes a central region at a center of the solid electrolyte layer and a peripheral region surrounding the central region and defining outer edges of the solid electrolyte layer. The peripheral region is higher than the central region in the thickness direction as measured from a reference surface including a highest point of the porous portion in the thickness direction and perpendicular to the thickness direction. The conductive layer is at least on the central region of the solid electrolyte layer.

Multi-terminal capacitor devices and methods of making multi-terminal capacitor devices are described herein. The multi-terminal capacitor devices may include a plurality of individual capacitors arranged in a single device layer, such as high surface area capacitors. A individual capacitor may include an aluminum foil-based electrode, an aluminum oxide dielectric layer conformal with the aluminum foil-based electrode, and a conductive material electrode, such as a conducting polymer or a conductive ceramic, in conformal contact with the dielectric layer.

An integrated capacitor that includes a plurality of capacitor elements, each of which has one of first internal electrodes and one of second internal electrodes; an exterior body accommodating the plurality of capacitor elements; a plurality of first external electrode layers on an outer surface of the exterior body and electrically connected to the first internal electrodes; and a plurality of second external electrode layers on the outer surface of the exterior body and electrically connected to the second internal electrodes. One of the first external electrode layers has a projecting portion projecting outward or a recessed portion recessed inward from part of an outer edge of the first external electrode layer in a plan view in a thickness direction of the first external electrode layer.

An integrated capacitor that includes a plurality of capacitor elements, each of which has one of first internal electrodes and one of second internal electrodes; an exterior body accommodating the plurality of capacitor elements; a plurality of first external electrode layers on an outer surface of the exterior body and electrically connected to the first internal electrodes; and a plurality of second external electrode layers on the outer surface of the exterior body and electrically connected to the second internal electrodes. One of the first external electrode layers has a projecting portion projecting outward or a recessed portion recessed inward from part of an outer edge of the first external electrode layer in a plan view in a thickness direction of the first external electrode layer.

The capacitor array that includes: a capacitor layer including a plurality of capacitor portions divided by a plurality of through-portions and arranged in a plane, and the capacitor portions each have a first main surface and a second main surface that are opposite to each other in a thickness direction. The plurality of through-portions include a first through-portion extending in a first direction perpendicular to the thickness direction, and a second through-portion extending in a second direction perpendicular to the thickness direction and intersecting the first direction. In a sectional view, each of the first through-portion and the second through-portion independently has a taper having a width decreasing from one of the first main surface and the second main surface to the other main surface. The first through-portion has a taper angle that is different from a taper angle of the second through-portion.

The capacitor array that includes: a capacitor layer including a plurality of capacitor portions divided by a plurality of through-portions and arranged in a plane, and the capacitor portions each have a first main surface and a second main surface that are opposite to each other in a thickness direction. The plurality of through-portions include a first through-portion extending in a first direction perpendicular to the thickness direction, and a second through-portion extending in a second direction perpendicular to the thickness direction and intersecting the first direction. In a sectional view, each of the first through-portion and the second through-portion independently has a taper having a width decreasing from one of the first main surface and the second main surface to the other main surface. The first through-portion has a taper angle that is different from a taper angle of the second through-portion.

An electrolytic capacitor includes exterior body and an element stack body including a plurality of capacitor elements. Each of the plurality of capacitor elements includes an anode body, a dielectric layer, and a cathode part covering at least a part of the dielectric layer. The exterior body includes a first principal surface, a second principal surface intersecting the first principal surface, a third principal surface opposite to the first principal surface, and a fourth principal surface opposite to the second principal surface. In at least one first capacitor element among the plurality of capacitor elements, an end surface of an end of the anode body is exposed from the exterior body at least on first principal surface to be electrically connected to a first external electrode. And an end surface of an end of the cathode part is exposed from the exterior body at least on second principal surface to be electrically connected to a second external electrode.

An improved capacitor, and method of making the capacitor, is described. The capacitor comprises an upper reinforced encapsulant layer and a lower reinforced encapsulant layer with

a capacitive element between the upper reinforced encapsulant layer and lower reinforced encapsulant layer. The capacitive element comprises an anode, a dielectric on the anode and a cathode on the dielectric. An internal reinforced encapsulant layer is between the upper reinforced encapsulant layer and lower reinforced encapsulant layer.