The Siemens SIRIUS 3RV1011-1EA20-ZX95 is a 3-pole motor protection circuit breaker rated for 4 A continuous current with a CLASS 10 trip characteristic. It's sized for a 1.5 kW motor at 400 V AC and provides phase failure detection, so it catches single-phasing conditions that would otherwise cook a winding. The 100 kA breaking capacity at 400 V AC means it can interrupt a fault up to that level without upstream fuses needing to clear first — useful in high-fault panels where SCCR headroom matters.
Mounting and integration
Mounts via screw or snap-on onto a 35 mm DIN rail per EN 50022. The 45 mm width and 90 mm height fit standard SIRIUS panel layout spacing. Spring-loaded terminals on the main circuit accept 2x (0.25... 2.5 mm²) solid or 2x (0.25... 1.5 mm²) finely stranded with ferrule — no screw torque to check, which speeds wiring in repetitive panel builds.
Breaking capacity and coordination
Rated breaking capacity varies by voltage: 100 kA at 240 V and 400 V AC, dropping to 3 kA at 500 V and 2 kA at 690 V. At 400 V — the common industrial distribution voltage — the 100 kA figure means this breaker can sit on a high-capacity bus without needing a current-limiting upstream device for most installations. The 6 kV surge voltage resistance covers typical transient conditions in motor circuits.
Environmental and approvals
Operating temperature range is -20 to +60 °C, storage and transport -50 to +80 °C. IP20 on the front — suitable for enclosed panel mounting, not for washdown environments. Shock rated at 25g / 11 ms, so it holds up in applications with vibration from contactors or conveyors. Mounting position is any, which simplifies panel layout.