The Siemens SIRIUS 3RV1011-1EA10-0FJ0-ZX95 is a motor-protective circuit breaker rated for 4 A continuous current. It carries a CLASS 10 trip characteristic. Breaking capacity hits 100 kA at 400 V AC (also 100 kA at 240 V AC), so it can interrupt bolted faults on high-capacity distribution without cascading upstream. At 500 V AC the rating drops to 3 kA; at 690 V AC to 2 kA — a reminder that for 480 V or 600 V class systems the SCCR headroom narrows and coordination studies should confirm the let-through. Phase failure detection is built in — a critical feature for motor protection: if one phase drops on a delta-connected load, the breaker opens before single-phasing cooks the winding. No ground-fault detection on this variant, so any ground-leakage trip would need an external module or relay.
Mounting and integration
Mounts via screw or snap-on onto 35 mm DIN rail per EN 50022. The 45 mm width and 90 mm height keep it to a single 45 mm module — fits a standard panel slot without crowding adjacent breakers or contactors. Depth is 81 mm, so verify enclosure depth if back-panel wiring or busbars are tight. IP20 on the front — touch-safe for panel installation but not for washdown or outdoor exposure. Mounting position is any, which helps when panels are oriented horizontally or on a swing frame. Terminals accept solid or stranded conductors: 2×(0.5…1.5 mm²) and 2×(0.75…2.5 mm²) per clamp, or 2× AWG 18…14 for the main contacts. Screw-type terminals — no spring-cage variant here; expect a screwdriver for termination.