What this breaker does and what the ratings mean
The Siemens SIRIUS 3RV2011-1GA10-ZW96 is a motor protection circuit breaker designed to protect induction motors against overload and short-circuit. The Class 10 trip class means it will trip within 10 seconds at 7.2× the thermal setting — that's fast enough to protect a standard motor during a stalled-rotor condition without nuisance tripping on a normal start. Phase failure detection is built in, so a lost phase on the line side will trip the breaker rather than letting the motor single-phase and burn. The breaking capacity is 100 kA at 400 V and also at 240 V. That's a very high figure for a motor-protective device — it means this breaker can safely interrupt a fault current up to 100,000 A at those voltages without welding contacts or rupturing the case. At 690 V the rating drops to 4 kA, which still covers most industrial motor branch circuits on a 690 V system. The rated insulation voltage spans 20 to 690 V, so it's suitable for 400 V and 480 V panels as well as 690 V installations.
Mounting and panel integration
Mounts via screw or snap-on onto a 35 mm standard mounting rail per DIN EN 60715. The mounting position is any — no derating for horizontal or inverted orientation. Dimensions: 45 mm wide, 97 mm deep, 97 mm high. Clearance requirements: 50 mm upwards, 50 mm downwards, 30 mm at the side, zero forwards and backwards. That means it can sit tight against the back panel and the cabinet door, but needs headroom and footroom for wiring and arc deflection. Main contact terminals are M3 screws, accepting 2×(0.75 to 2.5 mm²) solid or stranded, or 2×4 mm². Screw-type terminals for the main current circuit — standard for panel builders who prefer screw clamping over spring-cage for motor branch circuits.
Lifecycle and sourcing reality
The lifecycle stage is current — this is an active, in-production Siemens SIRIUS catalog item. No end-of-life notice or successor has been issued. For a BOM line that calls out 3RV2011-1GA10-ZW96, this is the direct fit: same dimensions, same trip curve, same breaking capacity. Sourced to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.