What it is and where it fits
The Siemens 3RV2011-0FA15-ZX95 is a SIRIUS motor protection circuit breaker designed to protect three-phase motors against overload and short-circuit, with integrated phase failure detection to prevent single-phasing damage. It mounts on a 35 mm DIN rail per DIN EN 60715 using either screw-fix or snap-on, and can be oriented in any position — useful for tight enclosures where panel layout is constrained. The breaker is rated for a continuous voltage range of 20 to 690 V, with a Trip Class 10 characteristic that clears overloads within 10 seconds at 7.2× set current — standard for general-purpose motor starting where the inrush transient is brief.
Breaking capacity and coordination
Short-circuit breaking capacity reaches 100 kA at 240 V, 400 V, 500 V, and 690 V — a flat high-fault curve that simplifies panel coordination because you don't need to derate for higher line voltages within that range. For motor protection at 230 V, the breaker supports a 0.1 kW motor load — a small rating that suits fractional-horsepower pumps, fans, or conveyor drives on a low-voltage line. The auxiliary contact block provides 1 A at 24 V, 0.5 A at 120/125/230 V, and 0.15 A at 60 V — enough for PLC-level signal feedback or contactor coil holding in a 24 VDC control circuit.
Integration and wiring
Terminals are screw-type for the main current circuit, accepting 2× (0.5 to 1.5 mm²) or 2× (0.75 to 2.5 mm²) solid or stranded copper — strip length per standard practice, no special tooling needed. The breaker occupies a 45 mm wide footprint on the DIN rail, with a depth of 97 mm and height of 97 mm. Clearance requirements: 50 mm above and below, 30 mm at the sides, and zero forwards or backwards — meaning it can be panel-mounted flush to the backplane. Operating temperature range is -20 to +60 °C with automatic temperature compensation over that span, so the trip curve stays accurate in a warm cabinet or cold warehouse environment.
Lifecycle and sourcing
No ground fault detection is built in (separate RCD or GFCI required if needed). The design is strictly for motor overload and short-circuit protection with phase failure detection.