What it is and what it does
The Siemens 3RV2011-0DA20 is a SIRIUS motor protection circuit breaker in the compact Size S00 frame, designed to protect motor branch circuits against overload, short-circuit, and phase failure. Its Class 10 trip characteristic means it will trip within 10 seconds at 7.2× rated current — fast enough to protect standard induction motors during a locked-rotor event without nuisance tripping on normal starting inrush. Rated breaking capacity hits 100 kA at 400 V AC, so it can safely interrupt a bolted fault up to that level without upstream fuses needing to clear first — that's the kind of SCCR headroom that simplifies panel coordination.
Panel integration and mounting
Mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715 — the snap-on feature lets you clip it in place without tools for initial layout, then screw-fasten for vibration resistance. Size S00 footprint: 45 mm wide, 106 mm tall, 97 mm deep. Clearance requirements: 50 mm above and below, 30 mm to the side, zero forward or backward (–,). That 50 mm top clearance is the one that catches people — skimp on it and you lose room for the spring-loaded terminal wiring. Main circuit connections use spring-loaded terminals, accepting 2× (0.5 to 4 mm²) solid or stranded wire. Strip length and screwdriver spec: 3 mm shaft diameter, 3.0 × 0.5 mm tip.
Lifecycle and sourcing reality
For a BOM freeze or second-source gate: the closest functional peer is the 3RV2011-0BA20, which shares the same Size S00 frame, Class 10 trip, and 100 kA breaking capacity — the difference is in the auxiliary contact configuration and the adjustment range. The 3RV2011-0DA20 drops into a panel wired for the -0BA20 without rewiring; the footprint and terminal layout are identical.
Environmental and compliance
Operating temperature range: -20 to +60 °C; storage and transport: -50 to +80 °C. Mountable in any position. Rated insulation voltage: 20 to 690 V. Maximum switching frequency in AC-3 duty: 15 operations per hour.