Motor protection circuit breaker, 0.32 A, Class 10 — what the ratings mean for fit
The Siemens SIRIUS 3RV1021-0DA10-ZX95 is a three-pole motor protection circuit breaker rated for a continuous current of 0.32 A, with a Trip Class 10 characteristic — meaning it will trip within 10 seconds at 7.2× rated current, matching the thermal curve of standard IEC induction motors up to 0.09 kW at 400 V AC. Its breaking capacity of 100 kA at 400 V AC (and across the full voltage range up to 690 V AC) means it can safely interrupt fault currents up to that level without upstream fuses or cascading failures — a key spec for high-fault panels where the available short-circuit current is high. The 0.32 A rating is the continuous current the breaker carries in free air; for a motor load, the actual setting must match the motor full-load current. Phase failure detection is built in, so a single-phase condition on the line side will trip the breaker — no separate phase-loss relay needed.
Panel integration and mounting
Mounts via screw and snap-on onto 35 mm standard mounting rail per DIN EN 50022 — the standard DIN-rail footprint for European panels. Width is 45 mm (three 15 mm modules), height 97 mm, depth 96 mm, with zero clearance required at the sides or rear. Screw-type terminals on both main and auxiliary circuits accept solid or stranded conductors: 2× (1…2.5 mm²) and 2× (2.5…6 mm²), or AWG 14–10 for the main contacts. The front face carries IP20 protection — finger-safe for panel installation, but not rated for washdown or outdoor exposure. The auxiliary switch option (product extension auxiliary switch: Yes) allows adding a signal contact for remote status indication — useful for PLC feedback or alarm annunciation on a motor starter circuit.
Lifecycle and sourcing reality
RoHS compliance date is listed as 01.05.2012, indicating the part has been RoHS-compliant since that date. The substance prohibitance date aligns with EU RoHS requirements.