The Siemens 3RV1011-1BA10-0FJ0-ZX95 is a SIRIUS-series motor protection circuit breaker — a compact, DIN-rail-mounted device that combines a thermal-magnetic overload relay and a short-circuit trip in one housing, sized for motor circuits up to 2 A continuous current.
The 2 A continuous current rating sets the maximum full-load current the breaker can carry continuously without tripping. For a 400 V three-phase motor, this corresponds to a 0.75 kW motor rating — so it's sized for small drives like fans, pumps, or conveyor sections under that power. That's fast enough to protect a standard motor winding during a locked-rotor event while allowing normal starting inrush for most general-purpose motors. Breaking capacity: 100 kA at 400 V AC, 100 kA at 240 V AC, 10 kA at 500 V AC, and 2 kA at 690 V AC. Mechanical endurance is rated at 100,000 operations for the main contacts. Maximum switching rate is 15 operations per hour at AC-3.
Mounting and wiring — what fits in the panel
Width 45 mm, height 90 mm, depth 81 mm — this is a compact 45 mm-wide frame that clips onto 35 mm DIN rail per EN 50022. No rear clearance needed (0 mm backwards), and 0 mm side clearance required, so you can pack breakers side-by-side without derating for spacing. Terminals accept solid or stranded conductors: 2× (0.5…1.5 mm²) or 2× (0.75…2.5 mm²) per clamp, with AWG equivalents 2× (18…14).
Front face is rated IP20 — finger-safe when installed in an enclosure, but not protected against moisture ingress. Shock resistance rated at 25g for 11 ms, surge voltage resistance 6 kV. This matters for thermal calculations inside a sealed panel — at 2 A it's modest, but in a densely packed row the heat adds up.