What this part is and where it fits
The Siemens SIRIUS 3RV2341-4JC10 is a circuit breaker designed specifically for starter combinations — meaning it integrates into a motor starter assembly as the short-circuit and overload protection element, not a standalone branch breaker. It mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715, in any position, and occupies 70 mm width on the rail.
Key ratings and what they mean for your panel
The 30 kA breaking capacity at 400 V AC (IEC 60947-2) means this breaker can safely interrupt a fault current up to 30,000 A at that voltage — essential for coordinating with upstream protective devices in a motor control center where available fault current is known. At 240 V AC the interrupting rating rises to 100 kA, so the same part covers high-fault installations on lower-voltage services without a separate high-interrupting variant. The rated operational voltage spans 20 to 690 V.
Mounting and wiring details
Screw-type terminals on the main current circuit accept solid conductors: 2x (2.5 to 16 mm²) or 1x (10 to 70 mm²) for the power wiring. Clearance distances: 150 mm upwards and downwards, 30 mm at the side, 0 mm forwards and backwards — tight side clearance means it can be packed closely on the rail, but vertical breathing space is needed for arc quenching. Depth of 176 mm and height of 165 mm fit standard enclosures.