SIRIUS Motor-Protective Circuit Breaker for 2.5 A Lines
The Siemens SIRIUS 3RV1011-1CA10-0FJ0-ZX95 is a motor-protective circuit breaker rated at 2.5 A continuous current, with a CLASS 10 trip curve and integrated phase-failure detection. It breaks up to 100 kA at 400 V AC, dropping to 10 kA at 500 V and 2 kA at 690 V — the 100 kA figure governs most 400 V industrial distribution panels; the 690 V rating matters only if the breaker sits on the secondary of a step-up transformer or in a 690 V motor circuit. Mounts via screw and snap-on onto 35 mm standard mounting rail per DIN EN 50022, any position. The 45 mm width and 81 mm depth fit a standard 45 mm-wide DIN-rail slot — no extra side clearance needed (0 mm at the side, 0 mm backwards). Front face carries IP20 protection; the enclosure is designed for panel interiors where tools and fingers are the main contact risk. Screw-type terminals for the main circuit accept 2x (0.5…1.5 mm²) solid or 2x (0.75…2.5 mm²) stranded — typical for a 2.5 A motor branch.
Peer Fit Note
The 3RV1011-1HA10 is a close functional peer within the same SIRIUS family. Both share the 45 mm width, CLASS 10 trip, phase-failure detection, and the same DIN-rail mounting footprint. The difference is in the continuous current rating and the breaking capacity at higher voltages — the -1HA10 is a higher-current variant. If your panel was specified around the -1HA10, the -1CA10-0FJ0-ZX95 will physically drop into the same rail slot and terminal pattern, but the continuous current rating must match your motor full-load amps; swapping between them without verifying the load current risks nuisance tripping or inadequate protection.