The Siemens 3RV2111-0AA10 is a SIRIUS-brand motor protection circuit breaker designed for motor protection with an integrated overload relay function. It combines short-circuit protection and overload protection in a single device, saving panel space and wiring time compared to a separate breaker-plus-overload combination. The 100 kA breaking capacity at 400 V AC (and also at 240 V, 500 V, and 690 V AC) tells you this breaker can safely interrupt fault currents up to 100,000 amps. That's a high-fault rating typical for industrial panels fed close to a transformer — it lets you avoid cascading an upstream breaker and keeps the SCCR of your panel assembly high.
Mounting and integration into a panel
The any-position mounting orientation gives flexibility in tight enclosures — no derating needed for horizontal or inverted installation. Dimensions are 65 mm wide by 97 mm tall by 97 mm deep, so it occupies a standard three-module width on the rail. Clearance requirements: 50 mm above and below, 30 mm to the side, and zero clearance forward or backward — useful when packing breakers into a shallow enclosure. Main circuit terminals are screw-type, accepting two conductors per clamp: 2x (0.5 to 1.5 mm²) solid/stranded or 2x (0.75 to 2.5 mm²). The screwdriver shaft needs to be 5 to 6 mm diameter — a standard Pozidriv #2 or flathead in that range fits.
The key difference is the 100 kA breaking capacity versus the 3RV2011's typical lower rating — check your available fault current before swapping, but mechanically it drops right in.
The rated operational voltage range is 20 to 690 V, covering low-voltage motor circuits from 24 V control transformers up to 690 V industrial mains. The AC-3 switching capacity is 15 operations per hour maximum — fine for a pump, fan, or compressor that cycles occasionally, but not rated for high-duty applications like a rapid-reversing conveyor. No ground fault detection on this unit — if you need that, you'd add a separate ground-fault relay or choose a different SIRIUS variant. Phase failure detection is included, as noted.