SIRIUS 3RV2041-4HA10-0DA0 — Motor Circuit Breaker, Size S3
The Siemens SIRIUS 3RV2041-4HA10-0DA0 is a Size S3 circuit breaker designed for system protection, rated 50 A at AC-3 duty at 400 V. That 50 A AC-3 rating means it handles the inrush and running current of a motor load up to 11 kW at 230 V — the Class 10 trip characteristic ensures it holds through a standard motor start without nuisance tripping. The screw-type terminals accept solid conductors up to 2x 16 mm² or stranded up to 1x 70 mm², with M8 main contact bolts. Dimensions are 70 mm wide, 165 mm high, 176 mm deep — fits standard S3 panel cutouts.
Integration Notes
The 3RV2041-4HA10-0DA0 is a system-protection breaker — it protects the cable and downstream components, not the motor directly. For motor protection, pair it with a SIRIUS contactor and overload relay. Ground fault and phase failure detection are not built in; those functions require an external module. Power dissipation is 27 W in hot operating state. In a densely packed panel, account for that heat — the S3 frame's 70 mm width leaves some air gap, but forced ventilation may be needed if adjacent devices are similarly loaded. The any-position mounting simplifies panel layout — no derating needed for horizontal vs vertical orientation.