The Siemens 3RV1011-1DA20 is a SIRIUS motor protection circuit breaker rated for a continuous current of 3.2 A, with a Class 10 trip characteristic. It delivers 100 kA breaking capacity at 400 V AC, dropping to 3 kA at 500 V and 2 kA at 690 V. That 100 kA figure at 400 V means it can safely interrupt a high-fault-current bolted short on a 400 V distribution bus without needing an upstream current-limiting fuse — it's self-protecting for most industrial panel feeds up to that SCCR. Phase failure detection is built in, so a single-phased motor sees a trip before winding damage sets in. Ground fault detection is not included — that's handled separately by a residual-current device or an upstream ground-fault relay.
Panel fit and wiring
Mounts via screw or snap-on onto 35 mm DIN rail per EN 50022, with zero clearance required at the sides or rear. The 45 mm width and 90 mm height keep it to a single DIN module footprint, so it slots into a standard motor starter row without crowding adjacent contactors or overloads. Spring-loaded terminals on both the main and auxiliary circuits accept 2x (0.25 to 2.5 mm²) solid or 2x (0.25 to 1.5 mm²) finely stranded with ferrules. Finger-safe touch protection (IP20 on the front) means the panel builder doesn't need to cover the breaker face separately in a finger-safe enclosure.