Motor protection circuit breaker, Size S00, Class 10
The Siemens 3RV2011-0BA10-ZW97 is a SIRIUS motor protection circuit breaker in the Size S00 frame, designed for motor protection with Trip Class 10 — meaning it will trip within 10 seconds at 7.2× the thermal setting, fast enough to protect standard induction motors from locked-rotor heating without nuisance tripping on normal starts. Rated breaking capacity is 100 kA at 400 V AC (also 100 kA at 240 V, 500 V, and 690 V AC), giving substantial SCCR headroom for most industrial panel designs without requiring upstream current-limiting fuses. Built-in phase failure detection trips the breaker if one phase is lost — a common cause of single-phasing motor burnouts on delta-connected loads.
Main circuit terminals are screw-type, accepting 2×(0.75…2.5 mm²) solid/stranded or 2×4 mm². Screwdriver shaft diameter 5 to 6 mm, Pozidriv size 2 tip.