SIRIUS 3RV1341-4LC10 — Motor Circuit Breaker for Starter Combinations
The Siemens 3RV1341-4LC10 is a SIRIUS-brand circuit breaker designed specifically for starter combinations — meaning it integrates directly into a motor starter assembly, combining short-circuit and overload protection in one device. Rated for 90 A continuous current and 45 kW at 400 V AC, it covers a substantial motor load band: think 45 kW four-pole induction motors on pump, fan, or compressor duty. Breaking capacity is the headline selector here. At 240 V AC it interrupts 100 kA; at 400 V AC, 50 kA; at 500 V AC, 8 kA; and at 690 V AC, 5 kA. For a 400 V panel with a high-fault utility feed, the 50 kA SCCR gives headroom without needing a current-limiting upstream fuse — that simplifies coordination studies. The AC-3 voltage ceiling is 690 V, so it handles 690 V motor circuits within the 5 kA fault limit. Three poles for the main current circuit, screw-type box terminals on the main side, separate screw terminals for auxiliary and control wiring.
Mounting and Panel Fit
Mounts via screw and snap-on onto 35 mm standard mounting rail per DIN EN 50022. Any mounting position is allowed. Dimensions: 70 mm wide, 165 mm high, 174 mm deep — that depth is the full body projection from the rail, so check gland-plate clearance if the panel is shallow. Zero clearance required at the back or sides for heat dissipation. Wire range is generous: solid conductors accept 2x (2.5 to 16 mm²); stranded accepts 2x (10 to 50 mm²) or 1x (10 to 70 mm²). Finely stranded with core-end processing accepts 2x (2.5 to 35 mm²) or 2.5 to 50 mm². AWG equivalents for main contacts: 2x (10 to 1) or 1x (10 to 2). That covers most panel-building wire gauges up to 70 mm².
Environmental and Protection
IP20 on the front — finger-safe touch protection against electrical shock, but not sealed against dust or moisture ingress. Suitable for dry indoor panels only; not for washdown or outdoor cabinets without an additional enclosure. Operating temperature range -20 to +60 °C; storage and transport -50 to +80 °C. Shock resistance rated at 25g for 11 ms.
Lifecycle and Sourcing
RoHS compliance date is July 1, 2006, so it meets the original EU RoHS directive. No ground-fault or phase-failure detection built in — those functions remain external to this breaker.