The Siemens 3RV1965-2BA0 is a front-mounted extended cable connection designed for six units of the SIRIUS 3RV1 motor-protective circuit-breaker family. It snaps onto the front of the breaker, routing the cable entry forward so the wiring exits toward the panel door rather than the DIN rail — a clean way to manage wire bundles in dense enclosures.
This accessory mounts directly to the front of a 3RV1 size S00 circuit breaker. It adds no depth behind the rail — the cable exit is forward, which keeps the wiring volume inside the enclosure envelope. For a panel builder, that means the existing DIN-rail spacing and side clearances are unchanged; the only additional space needed is in front of the breaker face.