The Siemens SIRIUS 3RV1021-1DA15 is a motor-protective circuit breaker rated for 3.2 A continuous current, designed for 1.1 kW motor loads at 400 V AC.
Zero clearance required at the sides and rear — no derating for adjacent units in a dense panel. Screw-type terminals on both main and auxiliary circuits accept solid conductors up to 2x 2.5 mm² or stranded up to 2x 6 mm², which covers the wire sizes for a 3.2 A motor branch.
Protection features and ratings
No ground-fault detection, so that must be handled externally if needed. The auxiliary switch is a transverse design and the product extension allows adding an auxiliary switch block for remote status or PLC feedback. Shock resistance rated at 25g for 11 ms suits it for mobile or vibrating equipment. Operating frequency is limited to 15 operations per hour at AC-3 duty — fine for occasional start/stop, not for high-cycle jogging.
The 3.2 A continuous rating with CLASS 10 trip makes this a direct fit for protecting a 1.1 kW motor at 400 V or smaller motors at lower voltages. For 24 V control circuits, the auxiliary contacts are rated 1 A; at 230 V they carry 0.5 A.