The Siemens 3RV1041-4HA10 is a SIRIUS motor protection circuit breaker rated for 50 A continuous current and 22 kW at 400 V AC-3 duty, with Trip Class 10 thermal overload protection. The 22 kW at 400 V figure tells you the motor power it can switch under AC-3 (squirrel-cage motor starting) conditions; a 22 kW, 400 V motor drawing roughly 40–42 A FLA fits comfortably. Breaking capacity varies by supply voltage: 100 kA at 240 V AC, 50 kA at 400 V AC, 12 kA at 500 V AC, and 6 kA at 690 V AC. At 400 V — the most common industrial distribution voltage — 50 kA SCCR covers nearly all panelboard and motor control center installations without requiring upstream current-limiting fuses. No ground-fault detection; if you need that, add an external ground-fault module or specify a different variant.
The 70 mm width and 165 mm height with 174 mm depth mean it occupies three standard 18 mm DIN modules — plan your enclosure rail accordingly. Zero clearance required at the back and sides, so you can pack breakers adjacent without derating for heat buildup, though the 27 W power dissipation at rated load should still be accounted for in enclosure thermal calculations. Main terminals accept solid conductors 2x (2.5…16 mm²) and stranded 2x (10…50 mm²) or 1x (10…70 mm²). That range covers from 14 AWG up to 2/0 AWG stranded — typical for 50 A motor feeds. Finely stranded with ferrule: 2x (2.5…35 mm²) or 2.5…50 mm². Torque specs aren't listed here, but standard M6 box-terminal torque around 4–5 Nm applies.