Abstract: A method of power switching includes receiving a command from an external aircraft controller to power an aircraft load from an aircraft voltage bus. The method includes in response to the command from the external aircraft controller, controlling a relay to connect or disconnect an aircraft voltage bus from an aircraft load. Controlling the relay includes current monitoring the relay and voltage monitoring the relay power switching. The method can include receiving temperature feedback indicative of temperature of the relay, and using the temperature feedback for at least one of controlling the relay and/or prognostic and health monitoring. The method can include outputting feedback to the external aircraft controller relating to status, operation, and health of the relay.

Abstract: A supplemental power generation arrangement for an aircraft includes a duct defined in the aircraft, a ram air turbine located in the duct and driven to rotate about a turbine axis by a ram airflow through the duct. One or more accessory components are operably connected to the ram air turbine. The ram air turbine is configured to provide rotational energy to power the one or more accessory components.

Abstract: A circuit mounting assembly can include a circuit board, a chassis, a sheet of thermally conductive dielectric material, and one or more fasteners configured to compress the sheet between the circuit board and the chassis to provide vibration isolation and electrical isolation between the chassis and the circuit board, and to provide thermal conduction between the chassis and the circuit board.

Abstract: A method of monitoring the temperature of a solid state switch in an aircraft solid state power controller. The method includes: measuring an electric current (I) flowing through the solid state switch; calculating, based on the measured electric current (I), an introduced electric power (Pel) that is introduced into the solid state switch within the predefined time period (?t); calculating an increase in temperature (?T) of the solid state switch that is caused by the introduced electric power (Pel); calculating an actual temperature (Tact) of the solid state switch by adding the calculated increase in temperature (?T) to an ambient temperature (Tamb); and comparing the calculated actual temperature (Tact) with a predefined temperature threshold (Tth) and determining an overheat condition if the calculated actual temperature (Tact) exceeds the predefined temperature threshold (Tth).

Abstract: A circuit mounting assembly can include a circuit board, a chassis, a sheet of thermally conductive dielectric material, and one or more fasteners configured to compress the sheet between the circuit board and the chassis to provide vibration isolation and electrical isolation between the chassis and the circuit board, and to provide thermal conduction between the chassis and the circuit board.

Abstract: A power feeder device can include a base having a mounting portion and a plurality of connector structures extending from the mounting portion and spaced apart relative to each other to form a respective gap therebetween. Each connector structure can be configured to receive a respective pair of terminals to electrically connect the respective pair of terminals within connector structures and to block a line of sight between an adjacent pair of terminals. The device can also include a cover configured to mate with the base to enclose each of the plurality of connector structures and to increase a length of a creepage path between each pair of terminals by at least partially inserting into each gap between the connector structures. The base and the cover can be configured to form a terminal opening on each lateral side when assembled to allow pass-through of a conductor and/or portion of each terminal.

Abstract: A connector for an electrical assembly includes an electrically conductive connector tab extending from a first electrical component, and a spring element wrapped around the connector tab. An electrically conductive connector slot is located at a second electrical component. The connector tab is configured for insertion into the connector slot such that the spring element is compressed between the connector tab and the connector slot defining an electrically conductive path between the connector tab and the connector slot.

Abstract: A connector for an electrical assembly includes an electrically conductive connector tab extending from a first electrical component, and a spring element wrapped around the connector tab. An electrically conductive connector slot is located at a second electrical component. The connector tab is configured for insertion into the connector slot such that the spring element is compressed between the connector tab and the connector slot defining an electrically conductive path between the connector tab and the connector slot.

Abstract: A fuse includes a housing. A bus bar extends through the housing. An arc interrupter positioned inside the housing. A biasing element is compressed between the housing and the arc interrupter to bias the arc interrupter toward the bus bar to separate two portions of the bus bar during circuit interruption to mitigate arcing from one portion of the bus bar to the other portion of the bus bar. The bus bar includes a pocket defined therein wherein the bus bar is of a first material, and wherein a second material is seated within the pocket. In another aspect, a fuse includes a fuse housing and a bus bar extending through the housing. The bus bar includes a pocket defined therein. The bus bar is of a first material, wherein a second material is seated within the pocket.

Abstract: A power feeder device can include a base having a mounting portion and a plurality of connector structures extending from the mounting portion and spaced apart relative to each other to form a respective gap therebetween. Each connector structure can be configured to receive a respective pair of terminals to electrically connect the respective pair of terminals within connector structures and to block a line of sight between an adjacent pair of terminals. The device can also include a cover configured to mate with the base to enclose each of the plurality of connector structures and to increase a length of a creepage path between each pair of terminals by at least partially inserting into each gap between the connector structures. The base and the cover can be configured to form a terminal opening on each lateral side when assembled to allow pass-through of a conductor and/or portion of each terminal.

Abstract: A circuit card assembly for a vehicle chassis is provided. The circuit card assembly may include a circuit card unit, a wedge-lock retainer unit, and a support bracket. The circuit card unit has a printed circuit board (PCB) defining a first fastener aperture. The wedge-lock retainer unit may define a second fastener aperture. The support bracket includes first and second elements. The first element may define a third fastener aperture and the second element may define a fourth fastener aperture. The PCB, the wedge-lock retainer unit, and the support bracket may be arranged with one another such that the first fastener aperture, the second fastener aperture, and the third fastener aperture are aligned with one another and such that the fourth aperture is oriented in alignment with a chassis aperture of a chassis.

Abstract: A system includes a first bus bar. A foil element is spaced apart from the first bus bar. The foil element is electrically connected to the first bus bar by grid elements. A second bus bar is spaced apart from the foil element across a dielectric layer. The system can include a second foil element spaced apart from the second bus bar.

Abstract: A circuit card assembly for a vehicle chassis is provided. The circuit card assembly may include a circuit card unit, a wedge-lock retainer unit, and a support bracket. The circuit card unit has a printed circuit board (PCB) defining a first fastener aperture. The wedge-lock retainer unit may define a second fastener aperture. The support bracket includes first and second elements. The first element may define a third fastener aperture and the second element may define a fourth fastener aperture. The PCB, the wedge-lock retainer unit, and the support bracket may be arranged with one another such that the first fastener aperture, the second fastener aperture, and the third fastener aperture are aligned with one another and such that the fourth aperture is oriented in alignment with a chassis aperture of a chassis.

Abstract: A system includes a first bus bar. A foil element is spaced apart from the first bus bar. The foil element is electrically connected to the first bus bar by grid elements. A second bus bar is spaced apart from the foil element across a dielectric layer. The system can include a second foil element spaced apart from the second bus bar.

Abstract: A printed wiring board (PWB) assembly includes a PWB main board defining a recess therein. An inlay is seated within the recess with a gap separating between the PWB main board and the inlay. Spacers are included within the gap to maintain gap width between the PWB main board and the inlay.

Abstract: A bussing connector is provided and includes bus bar connections, output elements and dielectric material. The bus bar connections each include an output section and an input section. The input sections cooperatively form a multiphase alternating current (AC) input. The output elements are arranged along and in electrical communication with the output sections of each of the bus bar connections. The dielectric material is configured to partially surround and partially electrically insulate the input and output sections and the output elements of each of the bus bar connections. The dielectric material is further configured to expose the multiphase AC input and portions of each of the outlet elements of each of the bus bar connections.

Abstract: A method for fabricating a circuit board apparatus includes providing a circuit board that has a socket with at least one plated through-hole and providing a connector that has a housing with first and second connector interfaces that have, respectively, at least first and second connector contacts. The first connector interface opens into an interior of the housing such that there is a vapor path through the first connector interface and interior of the housing to the second connector contact at the second connector interface. The first connector contact is inserted through the resilient seal and into the plated through-hole such that the resilient seal intimately seals around the first connector contact to provide a barrier at the first connector interface into the vapor path.

Abstract: A bus bar for a printed wiring board assembly has a distribution portion and a supply portion. The supply portion has a socket contact that is in electrical communication with the distribution portion without an intervening joint portion to limit electrical resistance between a supply plug seated in the socket contact and the distribution portion of the bus bar. Printed wiring board assemblies, power distribution assemblies, and methods of making printed distribution assemblies are also described.

Abstract: A bus bar for a printed wiring board assembly has a distribution portion and a supply portion. The supply portion has a socket contact that is in electrical communication with the distribution portion without an intervening joint portion to limit electrical resistance between a supply plug seated in the socket contact and the distribution portion of the bus bar. Printed wiring board assemblies, power distribution assemblies, and methods of making printed distribution assemblies are also described.

Abstract: A system for protecting electronics includes a printed wiring assembly (PWA) having a surface with at least one electronic component. The system also includes a water resistant film configured to be used as a conformal coating on the PWA and further configured to be placed on the surface of the PWA and to shrink about the at least one electronic component.