Range of molded case low voltage circuit breakers

A modular low voltage multipole circuit breaker, comprising:

• a plurality of identical single-pole breaking units each comprising a parallelipipedic insulating box having two opposite parallel large side faces and two opposite parallel small side faces, two terminals located at respective opposite parallel small side faces, at least one stationary contact electrically connected to at least one of said terminals, a movable contact cooperable between a first position contacting said stationary contact and a second position separated from said stationary contact;
• a molded case for housing said single-pole breaking units, said molded case having two opposite parallel side walls having the same thickness, said single-pole breaking units being sequentially arranged and parallel to each other and parallel to said side walls such that adjacent single-pole breaking units are spaced apart a distance equal to twice said thickness of said side walls, said single-pole breaking units being spaced apart at a constant pitch;
• and
• a single operating mechanism associated with said multipole circuit breaker common to all and usable on any of said single-pole breaking units for simultaneously operating all single-pole breaking units.