Abstract: A plug connecting element for a motor vehicle includes an electrical conduction element, to which at least one plug of an electronic component of the motor vehicle is able to be connected, and a casing element made of plastic, by way of which the conduction element is at least partially electrically insulated. The electrical conduction element is connected to the casing element in a fixed and non-releasable manner by primary forming of the plastic.

Abstract: The invention relates to a connection arrangement for connecting a busbar (40) to a housing (10) for electrical components (30), comprising the busbar (40) and at least one wall (11) of the housing (10) and at least one electrically insulating element (50), characterized in that the connection arrangement (20) has at least one fastening element (60; 61A; 62) for preferably detachable connection to the wall (11) of the housing (10) and the at least one electrically insulating element (50) is formed from a material having good thermal conductivity.

Abstract: A power supply apparatus includes a battery pack for an electric vehicle, and an interface unit that couples the battery pack and a plurality of electrical devices. The interface unit includes a branch connector provided with a coupling unit and a plurality of fuses. The coupling unit allows coupling wires to join. Each of the coupling wires is coupled to a corresponding one of electrical devices. Each of the plurality of fuses is disposed in a corresponding one of coupling wires. The interface unit also includes a battery pack connector that is able to be coupled to the branch connector. In a state in which the branch connector is coupled to the battery pack connector, the power supply apparatus is configured to be able to supply electric power from the battery pack to each of the plurality of electrical devices via the coupling unit.

Abstract: An electric connection box includes: an insulating casing; at least one internal electric part that is accommodated inside the casing and is electrically connected to a plurality of internal electric wires drawn from the inside to the outside of the casing; and a terminal block that is provided with at least one external electric part electrically connected to at least one external electric wire and is assembled into the casing outside the casing. The casing includes an accommodation member that accommodates the internal electric part, and a removable member that is attached to and detached from the accommodation member. The terminal block includes a holding member that holds the external electric part. The holding member is formed as one part integrated with the removable member.

Abstract: An electric connection box includes a housing, a first lid portion, a groove and a water stop wall. The housing includes an opening. The first lid portion includes a first body wall that closes the opening of the housing, and a first peripheral wall extending from a periphery of the first body wall toward the housing. The groove is provided between the first peripheral wall and a wall portion arranged to be spaced apart from the first peripheral wall. The water stop wall is provided on the first lid portion and configured to cover an opening of two ends of the groove in a longitudinal direction.

Abstract: A power distribution box and a method for producing a PDB include molding a lower cover with an integrated protector plate such that a unitary structure is formed. A busbar is inserted into a bottom side of a frame, and a lower cover is attached to the frame from the bottom side, thereby capturing the busbar between the frame and the lower cover. Integrating the protector plate into the lower cover eliminates a molding process, an assembly process, and adds structural integrity to the lower cover without the addition of extra structural support members, thereby reducing material use and the weight of the assembled device.

Abstract: A junction box assembly is provided with a conductive boss having a first contact surface and a second contact surface spaced apart from the first contact surface. A pair of threaded conductive studs each extends from one of the contact surfaces. A housing is overmolded onto the boss so that the first contact surface, the second contact surface, and the pair of studs are exposed. A printed circuit board (PCB) is oriented in the housing. A busbar is oriented in the housing in electrical communication with the PCB. The busbar has a conductive tab with an aperture formed therethrough. One of the pair of studs is received within the aperture and the contact tab is in electrical communication with one of the first contact surface and the second contact surface.

Abstract: Disclosed is an electric junction box capable of preventing an electric wire from entering into a second housing and contacting with an electric wire crimped part, and of allowing a bus bar smoothly to insert into a frame. The electric wire includes a frame and a bus bar. The bus bar includes a plate part, a plurality of terminals projecting in parallel with each other from one end of the plate, and an electric wire crimped part projecting from the other end of the plate. The frame includes a first housing accommodating the plate part and the plurality of terminals, and a second housing projecting from an end of the first housing and accommodating the electric wire crimped part. A tubular peripheral wall composing the second housing includes a slit passing the bus bar therethrough upon the bus bar being inserted into the frame.

Abstract: A fuse connection unit includes a metal core substrate that includes a metal core plate and insulation layers formed on front and back faces of the metal core plate, and a fuse block mounted on the metal core substrate. The metal core substrate has a fuse connection terminal part which is projected from an end edge of each of the insulation layers. The fuse block has a fuse connection terminal. The fuse connection terminal part and the fuse connection terminal are configured to be connected to a fuse.

Abstract: A circuit structure includes a circuit board having a conduction path and a through-hole continuing to the conduction path, a wire routing member that has a wire holding convex portion holding a wire configured to form a pre-determined conduction path and that is disposed to face the circuit board, a relaying wire whose one end is inserted into the through-hole in the circuit board to thereby connect the conductor path on the wire routing plate to that on the circuit board, and a positioning portion that is provided on the wire routing plate to thereby position a tip of the relaying wire.

Abstract: There is provide a fixation structure for fixing a L-shaped plate terminal to a terminal fixation portion of an insulating member, in which the L-shaped plate terminal can be fixed with its shape kept in a L-shape, which can improve positioning of the L-shaped plate terminal. There are provided engagement portions formed at an insert portion of the terminal fixation portion of the insulating member and at a board connection portion of the L-shaped plate terminal. When the board connection portion is inserted into the insert portion, the engagement portions of the insert portion and the board connection portion engage each other, thereby fixing the insert portion and the board connection portion to each other. As a result, the positioning of the board connection portion is improved, while preventing looseness in the fixation of the board connection portion.

Abstract: A bus bar attaching member 1 forming a room lamp 10 for a vehicle includes a housing 2 and a plurality of bus bars 3a, 3b, 3h and 3i insert molded in the housing 2. Further, in wiring parts 5 of the bus bars 3a and 3b, impact absorbing parts 6a and 6b are provided that prevent an impact when an electric wire 8 is pressed in contact with pressure contact parts 4 from being transmitted to parts attaching parts 7. The impact absorbing parts 6a and 6b are configured in U shaped forms by first absorbing parts 61a and 61b extending in the directions intersecting virtual straight lines K1 and K2 that connect bottom walls 40 of the pressure contact parts 4 to the parts attaching parts 7, second absorbing parts 62a and 62b and third absorbing parts 63a and 63b.

Abstract: Control modules having connectors with compliant pin terminals for connection to a printed circuit board (PCB) are provided. The module housing can be made of a die cast metal to withstand harsh environments and have at least one open bay area for receiving a connector having compliant pin contacts for connecting the module to a PCB. A plurality of compliant pin terminal can have a push shoulders for providing an engagement surface for insertion of the terminals through passages in a connector housing, for positioning the connector relative to the die cast housing during the mounting the connector to the die cast housing, and to transfer the force away from the connector housing applied in connecting the PCB to the compliant pin tips. The connectors can be linear and exposed terminal surfaces can be sealed against the elements by a sealant.

Abstract: A terminal is provided with a support portion configured to be mounted on a circuit board and having electrical insulation property, and a bus bar supported on the support portion and having electrically conductive property. The bus bar includes an external connecting portion configured to be electrically connected to external equipment, a first connecting portion configured to be electrically connected to the circuit board, and a second connecting portion configured to be electrically connected to another circuit board spaced from the circuit board, without passing through the circuit board.

Abstract: A fixing structure for an electrical junction box and a cassette, the fixing structure being adapted to fix the cassette on a side wall outer surface of the electrical junction box. A locking portion is provided on an outer surface of the cassette. A rib plate that extends in a vertical direction and projects downward adjacent to the locking portion to come into contact with the side wall outer surface. A counterpart locking portion to be locked on the locking portion is provided on the side wall outer surface. An engaging stepped-portion receives a lower end of the rib plate. When the locking portion and the counterpart locking portion are coupled to and locked on one another, the rib plate comes into contact with the side wall outer surface, and a lower end of the rib plate comes into contact with the engaging stepped-portion to restrict rotation of the cassette.

Abstract: Automotive electromechanic relay base with parallel terminals, for use in multiple pins boxes, with fast electric central clamping system, stressing the construction in ‘L’ (frontal connective, wall (12) coupled with the printed circuit board (P)) for the formation of the base, stored in a box (8) which, jointly with the frontal connective wall (12), forms a fitting (9) with a resilience and, on the opposite side, a dented (27) flexible lock (26), allowing the formation of a relays box/module, distributing the relays both throughout the printed circuit board (P) and its frontal connective wall (12), being the coil terminals (6) and potency terminals (7) of the relays set symmetrically aligned, forming the pins terminal (11) projected from the frontal connective wall (12), facilitating the fast clamping to the electric central.

Abstract: The electric connection block includes: a plurality of layers, each layer consisting of a plurality of terminals bent in an L-shape arranged in a line, each terminal having a first end portion for electric connection and a second end portion for connection to a circuit board; an electrically insulating terminal holder including receiving surfaces arranged in a stairs manner, each receiving surface placing a first section of the terminal thereon, and through holes each permitting a second section of the terminal to be inserted therein, the through hole being adjacent to the receiving surface; and a cover which includes hole parts each permitting the first section of the terminal to be inserted therein and joins the terminal holder.

Abstract: A bussed electrical center has a power cable for feeding electrical power to the bussed electrical center. A printed circuit board subassembly is interposed between a first housing member and a second housing member that are connectable together. An electrically conductive connector has a prong end and a distal end. The prong end is operably connected to the printed circuit board subassembly. A first fastener and a second fastener are positioned on opposite sides of the first and second housing members. When the first and second fasteners are tightened together to a draw the first and second housing members together to mechanically fasten the bussed electrical center together, the distal end and the terminal end are pressed against each other for electrical connection to each other to electrically connect the power cable to the printed circuit board subassembly.

Abstract: An electrical junction box includes a casing body containing a bus bar that serves as an internal circuit. A bus bar terminal portion is disposed on an outer edge of an upper surface of the casing body to be connected to a terminal. An electrical wire, on which the terminal is caulked, is arranged horizontally along an outer side wall of the casing body. A terminal cover encloses an electrical wire pressing section of the terminal. The terminal cover is fitted in a depression provided in the outer side wall of the casing body.

Abstract: A fuse box has a housing in which a plurality of fuses are received. The housing defines a busbar cavity. A busbar has a plurality of integrally formed terminals, and is received in the busbar cavity of the housing. The housing and the busbar are arranged such that the plurality of integrally formed terminals on the busbar are positioned to directly receive corresponding contacts of the plurality of fuses.

Abstract: An obliquely bent spring tab is projected from a circumference of a bolt hole in a power connector of a bus bar. When the bus bar is housed in and fixed to a case, the spring tab is in stable surface contact with a bolt. Thereby, conductivity inspection can be performed by connecting a conductivity inspection apparatus to the bolt.

Abstract: A joint part which allows connection work to be easily performed and a wiring harness using the same. A joint part A has a housing (60) including a first joint portion (10) arranged to make a concurrent connection of ends of electric wires drawn from positive terminals of a plurality of igniters (3) and positive terminals of a plurality of injectors (4) and an end of an electric wire drawn from a positive terminal of a power supply (5) for the igniters (3) and the injectors (4), a second joint portion (20) arranged to make a concurrent connection of ends of electric wires drawn from negative terminals of the igniters (3), and a ground terminal (40) to which the first joint portion (10) is connected via a noise filter (50), and the second joint portion (20) is directly connected.

Abstract: A communications outlet includes eight outlet tines positioned adjacent to one another and define four pairs of outlet tines. The fourth and fifth outlet tines define a first pair, the first and second outlet tines define a second pair, the third and sixth outlet tines define a third pair, and the seventh and eighth outlet tines define a fourth pair. Each outlet tine has a free end near which a plug tine is adapted to contact the outlet tine and each outlet tine has a fixed end coupled through a corresponding conductive tine to a corresponding electrical contact. The communications outlet includes an internal crosstalk compensation stage having a plurality of conductive fingers. Each conductive finger is physically connected to a corresponding one of the outlet tines proximate the free ends of the tines.

Abstract: There is provided an electric connection box, including: a terminal mounting portion which includes a connection portion and a fastening portion provided on the connection portion; a metal terminal slid to be held and fixed between the connection portion and the fastening portion; a pair of restricting walls which are upstandingly provided on the connection portion, and abut respectively against opposite side edges of the metal terminal to restrict the rotation of the metal terminal; a retaining rib which is disposed on a surface of the connection portion and projects from the surface; and a retaining groove which is formed in the metal terminal, and is engaged with the retaining rib to prevent the metal terminal from being disengaged from the connection portion.

Abstract: A method of correcting the alignment of a line of terminals using a jig that has a pair of openable and closeable sticks by opening the pair of sticks and inserting the terminals between the sticks. Closing of the sticks can be to a nipping direction for correcting the alignment. The alignment method is usable for inserting terminals into a mating unit.

Abstract: An electrical junction box has a casing for housing a circuit board on which electrically conductive paths are formed. Fuse-receiving sections in an upper wall of the casing are adapted to receive a mating member. Receiving ribs inward from an inside of a side wall of the casing at a position below the fuse-receiving sections to receive water that enters the casing from the fuse-receiving sections, guide ribs project inward from an inside of the side wall provided with the receiving ribs and extend from end edges of the receiving ribs to guide the water that is received on the receiving ribs to a bottom wall of the casing. A bottom wall of the casing defines drain holes.

Abstract: Bus bars to be contained in an electrical junction box are secured to insulation plates without caulking. An electrical junction box contains bus bars in a casing. The bus bars are disposed on an inner surface of the casing. Attaching pieces provided on the bus bars are inserted into and secured to receiving apertures provided in the casing. The attaching piece of each bus bar has a rectangular shape in cross section. Each receiving aperture in the casing is a circular aperture or a rectangular aperture. At least a part of an outer peripheral wall of each attaching piece contacts with an inner peripheral surface of each receiving aperture to restrain the attaching piece from moving in the aperture.

Abstract: An adjustable adapter for a cable connector with a fixed cable takeoff direction, relative to the cable connector, includes an input member having first and second terminals. A connecting member having first and second bus bars is configured to selectively mate to the input member in at least two different connecting member positions relative to the input member. In each of the different connecting member positions, each of the first and second bus bars is in electrical communication with a respective one of the first and second terminals. The connecting member accepts at least one cable connector, which therefore has at least two different, selectable cable takeoff directions relative to the input member. An adapter plate may facilitate mating of the cable connectors to the connecting member and the connecting member to the input member. A third terminal and third bus bar may allow for cable connectors with three cables.

Abstract: Disclosed is an electrical wiring block for an accessory. The accessory may be a switch or a receptacle. The electrical wiring block may include a base section and a wiring section positioned offset on the base section to form an overhang and an overhang seat. The base section may include a base plug and a base socket configured to fit within a base plug of an adjacent electrical wiring block. The wiring section may include wire holes, wire terminals, and wire ports positioned at an angle to the wire terminals. The wiring section may include a wiring section indent that may allow access to the wire ports on an adjacent, connected electrical wiring block. The overhang seat may cradle the overhang of an adjacent, connected electrical wiring block. The switch or receptacle may be installed in the electrical wiring block by pushing.

Abstract: An electrical junction box, which is assembled by first inserting a circuit board assembly into a primary housing via an opening of the primary housing, and after that inserting a secondary housing into the primary housing, includes a connector block that has a projection that widens the opening that has been narrowed. A plurality of ribs are formed on front and rear walls of the thin primary housing from the side of the opening in an insertion direction of the circuit board assembly. A concave groove formed between a pair of the projections engages with the rib of the front wall. The ribs on the rear wall are close to a circuit board of the circuit board assembly. The connector block has protuberances that abut against the ribs.

Abstract: An electrical junction box including a box main body and a wiring block. The box main body includes a cassette block. The wiring block includes a first bus bar, a second bus bar, and a fuse. Each bus bar includes an electric parts connecting part and the power source connecting part. The electric parts connecting part is connected to electric parts attached to the cassette block. The power source connecting part includes a fuse connecting piece and a connecting piece. A terminal fitting connected to a power source is connected to the connecting piece. The fuse connects the fuse connecting pieces of the bus bars.

Abstract: An electric connection and an electric component, the electric component comprising connectors for connecting the electric component. The connectors are formed of a first and a second electrically conductive laminar conductor, which are placed opposite each other and isolated from one another with an insulator, whereby the electric component is arranged to be connected through the plane surfaces of the laminar conductors, and the insulator is arranged between the laminar conductors such that the insulator comprises at least one free plane surface.

Abstract: A power distribution module includes a housing having multiple channels, and a plurality of buss bars received within the housing for distributing power between multiple electrical components. The buss bars have terminals that are selectively positionable within respective ones of the channels based on a predetermined arrangement of the electrical components.

Abstract: A casing 20 surrounding a circuit structure 10 consists of a frame 21, a heat sink 30 located in a rear side of the circuit structure 10 and a cover 60 located in a front side. The frame 21 is in a two-component structure consisting of a first frame member 22 shaped a capital letter C and a second frame member 23 disposed in a rear side of a first terminal part 15A. Thereby, before implementing a switching member 13, the circuit structure 10 can be bonded to the heat sink 30 and, thereafter, the first frame member 22 and the second frame member 23 are separately fixed to the heat sink 30 so that the frame 21 surrounding the circuit structure 10 from the periphery can be completed.

Abstract: An electronic control unit includes a circuit board, a case, and a group of a plurality of bus bars fixed to the case by insert molding. The bus bars each include a terminal portion having a constant-width portion, and a base portion which is wider than the constant-width portion. The base portions of the respective bus bars are arranged parallel to each other in the width direction thereof. Each bus bar is bent at a bent portion of its base portion. The terminal portion of each bus bar extends through the circuit board and is soldered to and electrically connected to a terminal connecting portion of an electrical circuit on the circuit board at a soldered portion. The bent portions of alternate bus bars are offset from the bent portions of the other bus bars in the longitudinal direction of the bus bars, whereby the soldered portions of the respective terminal portions are arranged in a staggered manner.

Abstract: A printed circuit board having fuse housings that is mounted in an electric junction box for a vehicle, includes a fuse case that has fuse housings provided in a plurality of parallel tiers; output terminals that are formed of L-shaped terminals connected to and projecting from a printed conductor of the printed circuit board, and that project inside each of the fuse housing tiers; input terminals that are formed of L-shaped terminals branching from bus bars, and that project inside at least one of the fuse housing tiers; and a base that is mounted on a rear surface side of the fuse case and that holds the input and output terminals that are passed through the base.

Abstract: An electric junction box, which can be easily assembled even if the electric junction box includes an electric power distributing unit, is provided. The electric junction box includes: a box body; a busbar attached to the box body, electric power from a power supply being supplied to the busbar; an electric power distributing unit attached to the box body, the electric power being supplied to the electric power distributing unit through the busbar; and a connector section connecting the busbar to an electric power inputting section of the electric power distributing unit, the box body being provided with the connector section.

Abstract: An electrical junction box reduces the number of components to be contained in an electrical junction box and simplifies a structure of the box. The electrical junction box has a casing assembly including an upper casing and a lower casing. A laminated unit including bus bars and insulation plates is contained in the upper casing, while a first printed circuit board, a second printed circuit board and a spacer made of an insulation resin material are contained in the lower casing. The first printed circuit board is disposed on one side of the spacer, while the second printed circuit board is disposed on the other side of the spacer. Shorter size fixing bars and longer size fixing bars project from an inner surface on a top wall of the upper casing. The shorter size fixing bars penetrate the laminated unit, first printed circuit board and spacer.

Abstract: A device for controlling a vehicle 8 comprising a housing 3, a rectangular printed circuit board 4 which is fixed to the inside of the housing and has a control circuit thereon, and plugs 1a and 1b provided along one side of the rectangular printed circuit board 4 to transfer signals between the inside and the outside of said housing 3; wherein the plugs 1a and 1b respectively contain plug pins and the plug pins 2 are electrically connected to the printed circuit board 4 via bonding wires 5 inside the housing 3.

Abstract: A fuse block 23 includes a main body portion 34, which is arranged along a top edge portion 21a of a frame 21, and an arm portion 35, which extends from an end of the main body portion 34 along a side edge portion 21b of the frame 21 that is roughly orthogonal to the top edge portion 21a. The mutual engagement of rocking restricting portions 31 and 41 that are provided on the side edge portion 21b of the frame 21 and the arm portion 35 restricts displacement of the arm portion 35 in relation to the side edge portion 21b of the frame 21 in a direction orthogonal to the length direction of the side edge portion 21b. This prevents rocking of the fuse block 23 in which the top edge portion 21a of the frame 21 serves roughly as a fulcrum.

Abstract: A junction block, in which the total structure and circuit connection structure are compact and highly dense, respectively, is provided. A junction block 1 includes: an inner cover 2; connector blocks 3, 4 and a power block 5 disposed outside the inner cover; and busbars 49 and wiring module disposed being piled up within a space surrounded by the connector blocks and the power block, wherein terminals 8b of the connector blocks, terminals 89 of the power block and terminals 49b, 49c of the busbars are connected to the wiring module. The wiring module consists of a random wiring module 52 and a cross wiring module 56. The terminals 8b, 49c, 89 are connected to ends of the wiring modules 52, 56 and part of the terminals 49b of the busbars 49 are connected to a middle part of the random wiring module 52 situated as a lower layer in the space.

Abstract: An electrical junction box that prevents deformation of a casing and breakage of a printed board due to an inserting force of a connector or the like is provided. A printed board is contained in a lower casing member. A bus bar laminated element is contained in the lower casing member above the printed board. An electrical component containing section including juxtaposed connector containing portions is provided on an upper side of an upper casing member above the bus bar laminated element. The upper casing member is mounted on the lower casing member. An upper reinforcement rib extends down from a lowermost stage insulation plate in the bus bar laminated element at a location below the electrical component containing section. The upper reinforcement rib is inserted into a through-hole in the printed board to extend down toward a bottom surface of the lower casing member. A lower reinforcement rib extends up from the bottom surface of the lower casing member to oppose the upper reinforcement rib.

Abstract: An electric distribution box includes a circuit which is operable to perform the flowing, interruption and detection of electric current, and the circuit having distribution parts and a first bus bar which connects the distribution parts, a case body in which the circuit is contained, and an external input/output terminal portion which is detachably mounted on an outer surface of the case body, and is adapted to be connected to the first bus bar.

Abstract: A sealed power distribution module includes a nonconductive body defining a terminal receptacle, a barrier seal engaged to and surrounding the body adjacent the receptacle on an exterior surface of the body, a terminal element grid fitted within the receptacle, and provisions for installing commercially available sealed terminals to complete the wiring. The grid is engaged to the body at a location interior to the barrier seal. The power distribution module may also include one or more bus bar assemblies oriented such that simultaneous switching of relay packages is possible.

Abstract: In a case, a branch circuit unit, a multifunction relay unit and a relay unit are stored, being subsequently arranged in parallel. The branch circuit unit is composed of a laminated body of a bus bar and an insulating board, and a first printed board provided with a conductor on the both front and rear planes. The multifunction relay unit is provided with a second printed board whereupon an electric component is mounted, and a relay connector which connects the conductors of the first to the third printed boards. An external connecting terminal is protruded from the conductor of the second printed board and is protruded into a connector fitting part provided on the case. The relay unit is mounted with a plurality of relays on the third printed board.

Abstract: A Power Distribution Boxes (PDBs), such as but not limited to the type employed in vehicles and other devices to distribute power from a primary power source to a number of loads. The PDB may include top-down constructions in so far as the main components are laid one on top of the other. Wires used to distribute energy from a primary source to a number of loads may be connected from an underside of the PDB.

Abstract: In a motor driver of a valve timing adjusting apparatus, each terminal at a first end side of a first circuit board is arranged after a corresponding terminal at a first end side of a second circuit board in a predetermined direction, which is generally perpendicular to a plane of each circuit board. Furthermore, each terminal at a second end side of the first circuit board is arranged after a corresponding terminal at a second end side of the second circuit board in the predetermined direction.

Abstract: A work machine includes a bulkhead separating an operator cab from an engine compartment. An electronic module includes a cantilever arranged mounting flange mounted to the bulkhead. The electronic module includes a rigid and thermally conductive frame. An electronics board is mounted to one side of the frame, and a power board is mounted to an opposite side of the frame. The electronics board carries a plurality of electronic components, and the power board carries a plurality of replaceable power elements. Each power element is a fuse, relay and/or circuit breaker. A housing encloses the electronics board and the power board. The housing includes an access cover to the power board.

Abstract: A case that houses a circuit component includes a frame along a peripheral edge of a circuit board, and a cover assembled to the frame so as to cover the circuit board, and connectors, facing an outer peripheral side of the frame are provided in the frame. In corresponding surfaces of the cover and each of the connectors, a first rib, a second rib, a first rib receiving groove, and a second rib receiving groove are formed that can regulate passage of a liquid in clearances between the connectors and the cover by fitting of protrusions and recesses. This prevents or limits a liquid outside the frame from entering the frame through the clearances between the connectors and the cover.

Abstract: An electric junction box includes a circuit construct as an internal circuit component. The circuit construct includes relays mounted on one side of a printed circuit board and bus bars fixed on the other side of the printed circuit board. The circuit construct is divided into a basic standard circuit construct and an optional circuit construct, in which the basic circuit construct is used in a plurality of grades of a vehicle family, in different vehicle families of the same grade, or in all vehicle families. Multiple circuit constructs may be combined as necessary and put in a side by side relationship. On the bus bar side of the circuit constructs, a heat sink is attached such that it is exposed to the opening provided on the case of the electric junction box.