The invention relates to a circuit breaker arrangement (1) having a metal-encapsulated circuit breaker housing (2) in which three switching units (5) are arranged, wherein the circuit breaker housing (2) has openings through which first and second connection lines (6, 7) of the switching units (5) pass, and wherein a fixed contact side (5.2) of the switching units (5) is mechanically held in the circuit breaker housing (2) solely by the first connection lines (6) which are connected to said fixed contact side. According to the invention, a drive contact side (5.1) of the switching units (5) is mechanically held in the circuit breaker housing (2) by means of a holder (11) which is mechanically coupled to the circuit breaker housing (2) and is composed of an electrically insulating material.