The Siemens 5SL6514-7BB is a 1+N-pole miniature circuit breaker rated at 230 V with a 6 kA interrupting capacity, C-curve trip characteristic, and a 0.3 A current rating — this is the Italy version.
The 1+N-pole form factor occupies a single module width, leaving room for additional breakers or accessories in the same rail. The Italy version designation indicates local market compliance; verify terminal markings and any regional certification marks on the nameplate against your panel's acceptance criteria.