The Siemens SIRIUS 3RV1021-4DA10-ZW95 is a 3-pole motor protection circuit breaker rated for 25 A continuous current and 11 kW at 400 V AC. At 690 V it still interrupts 4 kA, so it can serve 690 V motor circuits in regions where that line voltage is standard.
No ground-fault detection on this variant, so a separate ground-fault module or RCD is needed if that protection is required. The 25 A continuous rating is the thermal setting range; the actual adjustable overload relay inside the breaker is set to match the motor FLA. Trip Class 10 pairs with standard IEC and NEMA Design B motors — the 10-second window at 7.2× FLA is the typical benchmark for motor protection coordination.
Integration Notes
Main contacts accept 2× (1–2.5 mm²) or 2× (2.5–6 mm²) solid or stranded — strip length is standard 8–10 mm for screw clamps. Auxiliary switch extension is supported (product extension auxiliary switch = Yes), so a separate 3RV19xx auxiliary contact block can be snapped onto the side for remote status indication. Mounting position is any orientation. Shock rated at 25g for 11 ms — suitable for machine-mounted applications with moderate vibration. Maximum switching frequency under AC-3 duty is 15 operations per hour — fine for motor starting on pumps, fans, or compressors; not intended for high-cycling applications like rapid reversing or jogging.