What It Is and What It Does
The Siemens 3RV1011-0EA20 is a SIRIUS motor protection circuit breaker designed for protecting three-phase motors against overload, short circuit, and phase failure. It carries a continuous current rating of 0.4 A and a CLASS 10 trip characteristic, meaning it will trip within 10 seconds at 7.2× the set current — fast enough to protect standard induction motors during a stalled-rotor condition. The 100 kA breaking capacity at 400 V AC means it can safely interrupt a fault current up to that level without upstream fusing, as long as the prospective short-circuit current at the installation point doesn't exceed that figure.
Key Ratings and What They Mean for Your Panel
Rated 0.4 A continuous — this sets the full-load motor current it protects. For a 400 V three-phase motor, that corresponds to roughly 0.09 kW output. The CLASS 10 trip curve governs overload response: at a locked-rotor condition (typically 6–8× FLA), the breaker opens in under 10 seconds, matching the thermal withstand curve of most IEC standard motors. The 100 kA breaking capacity at 400 V AC is the same across 240 V, 500 V, and 690 V — a flat 100 kA rating that simplifies coordination in high-fault panels. Phase failure detection is built in; no ground fault detection. Mounts via screw or snap-on onto 35 mm DIN rail per EN 50022. The 45 mm width (three 15 mm modules) fits standard enclosure fill. Spring-loaded terminals on both main and auxiliary circuits accept 2x (0.25…2.5 mm²) solid or 2x (0.25…1.5 mm²) finely stranded with ferrule. No auxiliary contacts are included — the 0 count means you'll add a separate auxiliary switch block if you need remote status. IP20 finger-safe on the front; any mounting position works. Operating temperature range -20 to +60 °C; storage and transport -50 to +80 °C.