The Siemens 3RV2341-4YC10 is a SIRIUS circuit breaker designed specifically for starter combinations — meaning it integrates the disconnecting and short-circuit protection function directly into the motor starter assembly, saving a separate fuse or MCCB upstream. It mounts on 35 mm DIN rail per DIN EN 60715 via screw and snap-on, so it drops into any standard panel layout without adapters. Rated breaking capacity hits 65 kA at 400 V AC — that's the SCCR headroom you need for high-fault panels where the available fault current sits above 50 kA. At 240 V AC it clears 100 kA, so it handles the toughest industrial service-entrance conditions without cascading upstream. Motor horsepower coverage spans the common voltage bands: 20 hp at 230 V, 40 hp at 220/230 V, 75 hp at 460/480 V, and 100 hp at 575/600 V. That makes it a fit for medium-horsepower pumps, fans, and compressors across North American and 400 V global installations.
Dimensions and Panel Fit
The 3RV2341-4YC10 measures 70 mm wide by 165 mm tall by 176 mm deep — a compact footprint that leaves room alongside contactors and overload relays on the same DIN rail. Clearance requirements are 150 mm above and below, 30 mm to the sides, and zero forward or backward, so you can pack it into a shallow enclosure without breathing issues.
Terminal Capacity and Wiring
Screw-type terminals on the main circuit accept 2x (2.5 to 16 mm²) solid or stranded, with a larger single-wire range of 10 to 70 mm² for the incoming feed. That covers everything from #14 AWG through #2/0 AWG, so you don't need reducers or pigtails for mixed conductor sizes in the same panel.