The Siemens 3RV1011-0EA10-ZW95 is a SIRIUS-branded motor protection circuit breaker designed for protecting three-phase motors against overload and short-circuit. It carries a Class 10 trip characteristic, meaning it will trip within 10 seconds at 7.2× the thermal setting — the standard for standard-duty induction motor starts where the rotor is not locked. The breaker is rated for a breaking capacity of 100 kA at 400 V AC, which covers most industrial distribution panels fed by a transformer of that size without needing an upstream current-limiting fuse.
Mounting and Panel Integration
Mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715, in any orientation. The 45 mm width (three module spaces) and 75 mm depth fit standard gland-plate layouts; clearance requirements are 20 mm upward and downward, 9 mm to the side, and zero forward or backward. That means you can pack breakers tight side-to-side on the rail, but need a finger's width above and below for heat dissipation and wiring access.
Termination and Wiring
Main circuit connections use M3 screw-type terminals accepting 2× (0.5 to 1.5 mm²) or 2× (0.75 to 2.5 mm²) solid or stranded copper. The dual-wire capacity is useful for daisy-chaining the supply through multiple breakers on the same rail without additional terminal blocks. No auxiliary contact block is included in this order code variant — the -ZW95 suffix typically indicates a special selection of options; verify the specific accessory configuration against your BOM.
Protection Features and Ratings
Built-in phase failure detection ensures the breaker trips if one phase is lost, preventing single-phasing damage to the motor. Ground fault detection is not integrated — that would require a separate module or a different SIRIUS variant. The rated insulation voltage spans 20 to 690 V, and the breaker is rated for 100 kA breaking capacity at 240 V, 400 V, 500 V, and 690 V AC. At 480 V and 600 V the rated operational current is 0.4 A, which is a low setting for small motors or control transformers.