Motor protection circuit breaker for panel builders and MRO
The Siemens 3RV2011-0DA10-ZW97 is a SIRIUS motor protection circuit breaker in the compact size S00 frame. It's designed to protect motor circuits against overload, short circuit, and phase failure — the three faults that burn out windings and idle a line. Trip Class 10 means it trips within 10 seconds at 7.2× the thermal setting, which is the standard for standard-duty induction motors driving pumps, fans, and conveyors. That's fast enough to protect the motor but avoids nuisance tripping on startup inrush. Rated breaking capacity hits 100 kA at 400 V and 690 V AC — so it safely interrupts a bolted fault up to that level without welding contacts or cascading upstream. That's high enough for most industrial panel secondary distribution. Mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715. The 45 mm width fits one standard modular slot — easy to swap into an existing panel without re-drilling the backplate.
Integration notes for the panel
Clearance requirements: 50 mm above and below, 30 mm to the side, zero forward or backward — so it can sit flush against the back panel or a busbar shroud. That's tight for a 100 kA device. Terminals accept 2x (0.75 to 2.5 mm²) solid/stranded or 2x 4 mm² — sized for standard motor circuit wiring. Screw terminals with M3 main contact screws; use a Pozidriv size 2 tip with a 5–6 mm shaft diameter. Operating temperature range -20 to +60 °C covers most indoor panel environments. Storage and transport range -50 to +80 °C — fine for unheated warehouses or truck shipments in winter. Rated switching frequency at AC-3 and AC-3e is 15 operations per hour maximum — that's a motor start every 4 minutes. Not for high-cycle jogging or reversing service; that would need a contactor rated for higher mechanical life.
Why the ratings matter for your BOM
Phase failure detection is built in — no external relay needed. If one phase drops on a three-phase motor, the breaker trips before single-phasing cooks the winding. Ground fault detection is not included, so pair with a ground-fault relay if your installation requires it. The 100 kA breaking capacity at 240 V, 400 V, 500 V, and 690 V AC covers the common industrial voltages across North America and Europe. At 480 V and 600 V the rated current drops to 0.32 A — that's the thermal setting range, not the short-circuit rating.