What it is and where it fits
The Siemens 3RV1011-1EA10-ZX95 is a SIRIUS motor protection circuit breaker designed for motor protection, with screw-type terminals and a Trip Class 10 thermal-magnetic trip curve. It mounts on 35 mm DIN rail per DIN EN 60715 via screw or snap-on fastening, and accepts 2x (0.5–1.5 mm²) or 2x (0.75–2.5 mm²) solid or stranded conductors on the main contacts (M3 screws). The 45 mm width and 75 mm depth keep the panel fill factor tight — it fits alongside standard 45 mm modular devices without crowding the gland plate.
Key ratings and what they mean
The interrupting rating hits 100 kA at 240 V and 400 V — that's the maximum fault current it can safely clear without welding contacts or rupturing the case. For a motor branch circuit, that SCCR headroom means you can place this breaker downstream of a transformer or high-capacity bus without needing a current-limiting fuse upstream for most installations. At 690 V the rating drops to 2 kA, so verify the available fault current if the line runs at 690 V phase-to-phase. Trip Class 10 means the thermal overload element trips within 10 seconds at 7.2× the rated current — standard for standard-duty motor starting where the acceleration time stays under 10 seconds. Phase failure detection is built in, so a lost phase on the line side will cause the breaker to trip on the unbalance, protecting the motor from single-phasing. No ground-fault detection on this variant.
Mounting and clearances
Mounting position is any orientation. Required clearances: 20 mm upwards, 20 mm downwards, 9 mm at the side, 0 mm forwards, 0 mm backwards. The zero forward/backward clearance means it can sit flush against a panel door or backplate without derating — useful when packing multiple breakers into a shallow enclosure.