The Siemens 3RV2332-4WC10 is a SIRIUS circuit breaker designed specifically for starter combinations — meaning it's built to sit ahead of a contactor and overload relay in a motor control center, not as a general-purpose branch breaker. Its 50 kA breaking capacity at 400 V tells you it can safely interrupt a fault up to that level without cascading upstream, which is the figure that decides whether it clears the SCCR requirement on your panel label. The 52 A continuous rating at 480 V and 600 V matches it to a 40 hp motor at 460/480 V — so if you're feeding a 40 hp pump or conveyor drive, this breaker is sized for that load.
Mounting and integration
Mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715 — the standard profile in every European-spec panel. The 55 mm width is a single modular unit, so it occupies one slot on the rail. Clearance requirements: 50 mm above and below, 10 mm to the side, zero forward or backward. That 50 mm vertical gap is the one that catches people — if you're packing breakers in a row, leave that headroom for arc-chamber venting. Terminal capacity for the main contacts: 2x (1–35 mm²) or 1x (1–50 mm²) solid or stranded, with M6 screw terminals. That's enough for the 52 A feed conductors.