The Siemens 3RV2011-1KA10-ZW97 is a SIRIUS motor protection circuit breaker, designed for motor protection with Trip Class 10 — meaning it trips within 10 seconds at 7.2× the thermal setting, fast enough to protect standard induction motors from locked-rotor heat buildup without nuisance tripping on normal starts. Rated breaking capacity hits 100 kA at 400 V and 480 V, 42 kA at 500 V, and 4 kA at 690 V, so it handles high-fault-current panels without cascading upstream — a key spec for SCCR compliance in industrial control panels. Phase failure detection is built in, which protects motors from single-phasing damage — a common failure mode in older or unbalanced three-phase lines.
Mounting and integration
Snap-on mounting onto 35 mm DIN rail per DIN EN 60715, plus screw fixing for vibration environments — the 45 mm width fits standard motor starter combos (contactor + O/L) in a 45 mm grid. Mounting position any, with 50 mm clearance above and below, 30 mm at the sides, and zero forward/backward clearance needed — tight panel layouts work as long as the vertical air gap is respected.
Terminals and wiring
Main circuit uses screw-type terminals accepting 2×(0.75–2.5 mm²) or 2×4 mm² solid/stranded — common for motor branch circuits up to the rated current. Main contact screws are M3, standard for this class; no special tooling needed.