Siemens SIRIUS 3RV2332-4EC10 is a circuit breaker designed specifically for starter combinations — meaning it integrates into a motor starter assembly with a contactor and overload relay, not as a standalone feeder breaker. Rated 32 A at 480 V and 32 A at 600 V, with a breaking capacity of 50 kA at 400 V and 100 kA at 240 V. That 50 kA at 400 V tells you it can handle high-fault-current industrial panels without cascading upstream — the SCCR headroom is there for the line side. It uses screw-type terminals on the main circuit, accepting up to 2x 35 mm² or 1x 50 mm² solid or stranded copper.
Mounting and integration
Snap-on mounting onto a 35 mm standard mounting rail per DIN EN 60715, with screw fastening for security. Mounting position any orientation — no derating for side or upside-down mounting. Clearance: 50 mm upward and downward, 10 mm to the side, zero forward or backward. That zero forward clearance means it can sit flush against a back panel or enclosure wall — handy when packing multiple breakers in a shallow gland plate layout. Dimensions: 55 mm wide, 140 mm high, 149 mm deep.
Electrical ratings and environment
Rated voltage range 20 to 690 V AC. Breaking capacity varies by voltage: 100 kA at 240 V, 50 kA at 400 V, 8 kA at 500 V, 4 kA at 690 V. That drop-off at 690 V is typical for a 32 A frame — the arc extinction limits the high-voltage interruption. Operating temperature -20 to +60 °C, storage -50 to +80 °C. No ground-fault or phase-failure detection built in — this is a thermal-magnetic or electronic motor-protective breaker, not a full power monitor. Main contact terminals are M6 bolts.