Insulating-material housing and compact circuit breaker

A compact circuit breaker, comprising:

• an insulating-material housing having:
• a front side, a fastening side opposite said front side, and narrow and wide sides connected between said front side and said fastening side;
• first and second current path regions disposed next to one another in a width direction and configured to each receive a current path, with each of said current path regions having:
• a first receptacle space configured to receive a short-circuit tripping device of the circuit breaker;
• a second receptacle space configured to receive a switching contact of the circuit breaker;
• a third receptacle space configured to receive an arc-quenching device of the circuit breaker;
• said two first receptacle spaces being disposed in said insulating-material housing in a region of said front side and in a region of a respective one of said narrow sides;
• said two second receptacle spaces being disposed in said insulating-material housing centrally between said two first receptacle spaces;
• said third receptacle spaces each being disposed between said fastening side and the respectively assigned said first receptacle space of the respective said current path region;
• a fourth receptacle space configured to receive an additional functional group of the circuit breaker;
• said fourth receptacle space being disposed, in a normal direction of said wide sides, next to said first and/or third receptacle spaces of said first current path region;
• a first current path in said first current path region that is interruptible by a first switching contact disposed in said second receptacle space of said first current path region;
• a second current path in said second current path region that is interruptible by a second switching contact disposed in said second receptacle space of said second current path region;
• a first short-circuit tripping apparatus disposed in said first receptacle space of said first current path region, and a second short-circuit tripping apparatus disposed in said first receptacle space of said second current path region;
• a first arc-quenching device disposed in said third receptacle space of said first current path region, and a second arc-quenching device disposed in said third receptacle space of said second current path region;
• and
• an additional functional group disposed in said fourth receptacle space.