Motor protection circuit breaker for the panel builder
The Siemens 3RV1011-0HA10-ZW95 is a SIRIUS motor protection circuit breaker designed for motor protection, with a CLASS 10 trip characteristic that clears overloads before the motor winding reaches damaging temperature. It carries a 100 kA short-circuit current rating (SCCR) at 400 V AC, meaning it can safely interrupt faults up to that level without cascading upstream — critical for panel coordination studies. The unit is rated 0.1 kW at 230 V and 0.8 A at 480 V and 600 V, so it's sized for small motor loads like pumps, fans, or conveyors in a control panel. Phase failure detection is built in, so the breaker trips if one phase drops out — a common cause of single-phasing motor burnouts. No ground fault detection on this variant, so if that's needed, you'd step up to a different order code in the family.
Mounting and integration
Fastens via screw and snap-on mounting onto 35 mm standard mounting rail per DIN EN 60715. Mounting position is any orientation, which simplifies panel layout. Dimensions are 45 mm wide, 90 mm high, 75 mm deep — fits a standard 45 mm module slot. Clearance requirements: 20 mm upwards, 20 mm downwards, 9 mm at the side, 0 mm forwards and backwards. Screw-type terminals for the main current circuit, accepting 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded wire. Terminal screws are M3. No special tools beyond a standard screwdriver.
Lifecycle and sourcing reality
The -ZW95 suffix indicates a special version. The base order code 3RV1011-0HA10 is the standard variant; functionally they share the same ratings and footprint.
Backup fuse and environmental limits
At 500 V and 690 V, a backup fuse gL/gG 6 A is required upstream. At 240 V and 400 V, no backup fuse is needed — the breaker's own 100 kA SCCR handles it. Operating temperature range is -20 to +60 °C with temperature compensation active across that span. Storage and transport range is -50 to +80 °C. Maximum switching frequency at AC-3 duty is 15 operations per hour — fine for occasional motor starts, not for high-cycling applications like rapid reversing.