Circuit breaker housing

A circuit breaker housing for holding a switching device and a number of connection contacts for a connection line and/or a busbar, the circuit breaker housing comprising:

• a first housing part and a second housing part;
• at least a first and second connection module having a connection contact for a connection line;
• wherein, in a joined or assembled state, said first and second housing parts together form a front side and a rear side opposite said front side, and at least one connection side and end faces located opposite one another;
• and
• wherein a holding chamber for receiving at least one connection module having one of said connection contacts is formed on said front side and/or on at least one of said connection sides;
• and
• wherein each connection module has a module housing, which has a connection opening for a connection line, said connection opening leading to the connection contact, and a contact opening;
• wherein the connection opening is arranged at that housing side of the module housing that faces toward the front side or the connection side, is flush therewith or forms same when the connection module is inserted into the holding chamber, and
• wherein the contact opening is arranged at that housing side of the module housing that faces toward a chamber base of the holding chamber when the connection module is inserted into the holding chamber;
• wherein the first connection module and/or the second connection module has a screw terminal or a screwless spring terminal as connection contact;
• and
• wherein the connection contact of the first or the second connection module has a contact element for electrical connection with a coupling contact received by the housing parts in the joined or assembled state, the coupling contact being accessible via a housing slot provided on the connection side.