A conductor rail module for distributing and a corresponding connection module for tapping a direct current distributed along a mounting rail is described. The connection module comprises a housing whose electrically insulating rear section is connected or connectable to the mounting rail in a form-fit manner. A front section of the housing has a plurality of electrically insulating transverse struts extending transversely to a longitudinal direction of the conductor rail module. Furthermore, the conductor rail module comprises at least two conductor rails extending in the longitudinal direction in the housing between the rear section and the front section, which conductor rails are configured to contact the connection modules for distributing the direct current through a gap between the transverse struts when the connection modules are in a position mounted on the conductor rail module.

An access terminal box includes a base plate, wherein a first fastening part, a second fastening part, and a fastening lever that are configured to fasten the access terminal box to a mounting plate disposed on the base plate, a through hole is disposed on the second fastening part, the fastening lever includes a head part, a body part, and an elastic part, the head part is connected to the body part, one end of the elastic part is connected to the head part, the body part and the elastic part are located inside the through hole, and the head part is exposed at a first outlet of the through hole.

A terminal strip having an insulating material housing that has a latching foot for latching onto a mounting rail and has a width less than the length and height, and conductor connections in the insulating material housing that are arranged next to one another in pairs. The insulating material housing is in two parts and has a base housing and a lower housing. The base housing has, in a first connection region, a pair of conductor connections that are electrically conductively connected to one another. In a second connection region, the base housing has a cutout that is laterally bounded by the insulating material of the second connection region. The lower housing can be inserted into the cutout. The lower housing has a conductor connection that is electrically insulated from an adjacent conductor connection that is arranged in the second connection region, in the base housing.

A carrier rail housing (1) is described comprising a snap-in base (2) for setting on a carrier rail (3). The snap-in base (2) comprises a carrier rail receiving opening (5) for receiving a carrier rail (3), two snap-in latches (4, 12) movable relative to each other comprising respectively at least one snap-in lug (6, 13), which protrude in a snap-in position into the carrier rail receiving opening (5) for locking with a carrier rail (3) receivable in the carrier rail receiving opening (5), and a coupling element (10) which is in operative connection with the two snap-in latches (4, 12) and transfers a movement of one snap-in latch (4) into a movement of the other snap-in latch (12). The snap-in base (2) further comprises a locking arm (15) with a stop (18) protruding into the carrier rail receiving opening (5) in an open position, in which the snap-in lugs (6, 13) are unlocked from the carrier rail (3), for applying at a side edge of the carrier rail (3) receivable in the carrier rail receiving opening (5). The locking arm (15) is in an operative connection with the snap-in latches (4, 12) in such a way that the snap-in latches (4, 12) are held in the open position by the application of the stop (18).

A mounting device functions to support a connection process of at least one module of a modular circuit board connector to at least one connection element. The mounting device comprises at least one base plate and at least one tongue arranged essentially perpendicular on the base plate and running parallel to the longitudinal axis of the base plate. The tongue is at least partially designed to received the at least one module.

An adapter housing is provided for receiving a contact carrier, wherein the adapter housing has on its outer wall two connecting structures or means, molded on opposite one another and complementing one another, for reversibly connecting to an adapter housing of the same type and/or to a top-hat rail fixing element and wherein the adapter housing has on the inserting side at least one locking device or means for reversibly locking the adapter housing to a further adapter housing. A system comprising of a first adapter housing, with a first contact carrier received therein, a second adapter housing, with a second contact carrier received therein, and a top-hat rail is also provided.

There is provided a rail attachment apparatus for an electrical device in which a biasing elastic function is imparted to a slider itself, whereby the slider can be adjusted to be thin and the number of components can be decreased. The rail attachment apparatus includes a nipping portion that nips one side edge of an attaching rail fixed to an attaching surface of the electrical device, and a slider that is opposed to the nipping portion and slidably held at the other side edge of the attaching rail in a direction intersecting with this attaching rail. The slider is provided with integrally formed bending elastic portions which bias the slider in a direction to enable nipping the attaching rail.

A relay terminal block fixed to a fixing part by a screw includes a main body having a first surface facing the fixing part, and a second surface on a rear surface side of the first surface. The main body is formed with a recessed portion depressed from the second surface toward the first surface, a through-hole formed from a bottom surface of the recessed portion through to the first surface, and a protrusion that is provided at an edge of the recessed portion to protrude in a direction away from the second surface. The through-hole is formed to have an inner diameter larger than an outer diameter of a shaft of the screw and smaller than an outer diameter of a head of the screw, and the recessed portion is formed to have an inner diameter larger than the outer diameter of the head of the screw.

A terminal block includes an insulating casing defining a recess receiving a conductive bar and a retaining spring. The conductive bar includes a base portion, a support leg attached to the base portion and a cooperating leg attached to the base portion. In a mounted position of the conductive bar and the retaining spring within the recess, the support leg engages with a support part of the retaining spring, and the cooperating leg is positioned to engage with a conductor inserted into a plug of the terminal block.

A bolt terminal mounted on a guide rail is provided. The bolt terminal comprises a housing (1), an integral nut (2), a screw (3), a connection component (4), and a wiring metal surface (5); one end of the screw is provided in the housing, the other end of the screw is located outside the housing, and the screw located outside the housing is to be connected to the integral nut fitted therewith; the wiring metal surface is provided on the interface between the screw and the housing; and the housing is to be connected to the guide rail via the connection component. The bolt terminal increases the requirement for powering the wirings, and the bolt terminal can be removed from the guide rail only by using a conventional screwdriver to lightly tap on a removal port. The screw is integrally connected to the housing by injection molding and thus there is no risk of the screw falling off, enabling higher reliability.