The Siemens 3RV2011-1JA25 is a SIRIUS motor protection circuit breaker, designed for protecting three-phase motors against overload and short-circuit. Trip Class 10 means it trips within 10 seconds at 7.2× the thermal setting — fast enough to protect standard induction motors during locked-rotor events without nuisance tripping on normal starts. Phase failure detection is built in, so a lost phase on the line side will drop the load before single-phasing damages the winding.
SCCR and interrupting capacity
Rated short-circuit breaking capacity hits 100 kA at both 230 V and 400 V — that is the full prospective fault current this breaker can interrupt without welding contacts or rupturing the housing. At 500 V it still clears 42 kA; at 690 V it holds 4 kA. For a panel builder coordinating with upstream fuses or a main breaker, that 100 kA figure at 400 V means you can typically skip a current-limiting fuse ahead of this device in a 100 kA SCCR-rated panel, as long as the feeder can deliver that. The gL/gG fuse backup ratings (50 A at 400 V, 40 A at 500/690 V) give you a coordination path if the available fault current exceeds the breaker's standalone rating.
Mounting and wiring
Mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715. The 45 mm width means it occupies one standard 45 mm module slot — no extra space needed. Spring-loaded terminals on the main circuit accept 2× (0.5 to 2.5 mm²) solid or stranded. Strip length for the spring cage is not specified here, but typical Siemens spring terminals on this class need about 8–10 mm. Mounting position is any, so vertical or horizontal rail orientation works. Clearances: 50 mm above and below, 30 mm to the side, 0 mm front and back — meaning you can stack adjacent devices tight side-to-side, but leave breathing room top and bottom for arc venting.