SIRIUS circuit breaker for starter combinations
The Siemens 3RV2342-4JC10 is a SIRIUS circuit breaker designed for starter combinations — meaning it integrates motor protection and disconnection in one package, sized for a panel that needs coordinated short-circuit and overload protection on a motor branch circuit. Rated 63 A at both 480 V and 600 V, with a breaking capacity of 100 kA at 400 V AC, this breaker handles high-fault-current scenarios without cascading upstream — a key spec for SCCR compliance in industrial control panels.
Rated 63 A at 480 V and 600 V sets the continuous current limit for motor loads. The AC-3e switching frequency maxes at 15 operations per hour, so it's suited for occasional starting — not for high-cycling applications like rapid reversing.
Dimensions are 176 mm deep, 70 mm wide, 165 mm high. That 150 mm vertical gap matters for heat dissipation and arc-flash clearance — don't crowd the vents. Screw-type terminals accept solid or stranded conductors: 2x (2.5 to 16 mm²) for the main circuit, and up to 1x (10 to 70 mm²) or 2x (2.5 to 50 mm²) for larger feeds. The range covers standard motor branch wiring up to about 1/0 AWG.
Lifecycle stage is marked as current, meaning Siemens has no published end-of-life plan for this order code as of the latest data. It remains in the active SIRIUS catalog.