A protection device cartridge of an electrical installation intended to be brought on a base including an active protection component having a first terminal and a second terminal; a first connector forming a first electrical circuit portion electrically connected to the first terminal and to a first bearing portion of the base and a second connector forming a second electrical circuit portion electrically connected to the second terminal and to a second bearing portion of the base, the first connector and the second connector being arranged to allow the connection of the cartridge on the base according to an insertion direction, the first bearing portion and the second portion presenting a spacing determined according to the direction transverse to the insertion direction, where the second bearing portion is disposed between a first end point of the first electric circuit portion and the first bearing portion according to the direction transverse to the insertion direction and where the first bearing portion is disposed between the second bearing portion and a second end point of the second electrical circuit portion according to the direction transverse to the insertion direction, the first end point and the second end point presenting a determined spacing, greater than the spacing between the first bearing portion and the second bearing portion.

A surge protection device comprises at least one surge protection unit, consisting of a substantially U-shaped socket part and a plug part which can be fixed in the socket part and which receives a surge protector. Insulated electric conductors on or in the socket part are contacted by vampire taps or displacing terminals. The surge protection device also comprises openings or perforations formed in the socket part for receiving conductors. The openings are selectively designed so that the electric conductors are inserted into or through the openings, and the openings are exposed in a socket part region which can be covered by the socket part such that cutting surfaces located on the base of the plug part penetrate the conductor insulation during the plug-in process and directly contact the respective conductor.

The invention relates to a surge protection device comprising at least one surge protection unit, consisting of a substantially U-shaped socket part and a plug part which can be fixed in the socket part and which receives a surge protection means. Insulated electric conductors on or in the socket part are contacted by means of vampire taps or displacing terminals. The surge protection device also comprises openings or perforations formed in the socket part for receiving conductors. According to the invention, the openings are selectively designed so that the electric conductors are inserted into or through the openings, and the openings are exposed in a socket part region which can be covered by the socket part such that cutting surfaces located on the base of the plug part penetrate the conductor insulation during the plug-in process and directly contact the respective conductor.

An electronic device for mounting on a support rail, has a housing, an electronic unit arranged in the housing, and an elastic contact element that serves in the electrically-conductive connection between the electronic unit and the support rail. The contact element has two contact legs, a connecting area connecting the contact legs to one another, and a contacting section connected to the connecting area for making contact with the electronic unit, and wherein when the electronic device is in the mounted state, the contact legs of the contact element make contact in a clamping manner with a leg of the support rail in-between. The contact element arranged ensures, with small size, good electrical and mechanical contacting of the support rail. The sides of the two contact legs facing one another form a short contact area. The first contact area on is sharp-edged, and the second contact area forms a swivel.

A base element for an at least two-part overvoltage protective arrangement, has a support rail receptacle for receiving a support rail carrying an electrical potential, a first receptacle for receiving a first electrical conductor, a second receptacle for receiving a second electrical conductor, and a protective element receptacle for receiving an overvoltage protective element. An electrical connecting element for transmitting an electrical signal from the first receptacle to the second receptacle is produced between the first second receptacles. An electrical support rail contact element makes electrical contact with the support rail when the support rail is received by the support rail receptacle. The first and second receptacles receive electrical connector parts or adapter connector parts for electrical connector parts. An overvoltage protective arrangement with such a base element. The base element and overvoltage protective arrangement make possible simple installation in existing control and signaling systems with minimal intervention.