What it is and what it does
The Siemens 3RV2011-1JA10-ZW96 is a SIRIUS motor protection circuit breaker designed for motor protection, with screw-type terminals for the main current circuit and a Class 10 trip characteristic that matches standard induction motor starting profiles — it holds through a normal start but trips fast enough to protect the motor winding during a stall or overload. It mounts on a 35 mm DIN rail per DIN EN 60715 using either screw or snap-on fastening, in any mounting position, which simplifies panel layout when space is tight. Phase failure detection is built in — if one phase drops out, the breaker trips, preventing single-phasing damage to the motor.
Short-circuit and overload ratings — what they mean for your panel
The interrupting capacity at 240 V and 400 V is rated at 100 kA, meaning this breaker can safely clear a fault up to that level without welding contacts or rupturing the case — critical for high-fault-capacity installations like large MCCs or transformer-fed panels. At 500 V the SCCR drops to 42 kA, and at 690 V it is 4 kA — still adequate for most 690 V industrial loads, but verify the available fault current at the point of installation. The motor horsepower ratings span 0.5 hp at 110/120 V up to 5 hp at 460/480 V, covering fractional through small integral-horsepower motors in a single frame size.
Dimensions and integration
At 45 mm wide, 97 mm high, and 97 mm deep, this breaker fits a standard 45 mm modular device slot on the DIN rail — same footprint as a typical miniature circuit breaker, so it drops into existing panel layouts without re-spacing. Clearance requirements: 50 mm above and below, 30 mm to the side, and zero clearance forward or backward — the zero forward clearance means it can sit flush against a panel backplate or busbar shield. Terminals accept 2x (0.75 to 2.5 mm²) solid or stranded, or 2x 4 mm² — sufficient for the motor branch circuit wiring typical at these ratings.