What it is and what it does
The Siemens 3RV2011-1HA10 is a SIRIUS motor protection circuit breaker — a compact, DIN-rail-mounted device that combines a thermal-magnetic overload relay and a short-circuit trip in one unit, designed to protect three-phase induction motors. Trip Class 10 means it will trip within 10 seconds at 7.2× the thermal setting, fast enough to protect standard IEC motors from locked-rotor heating without nuisance tripping on normal starts. Phase failure detection is built in — if one phase drops out, the breaker trips, preventing single-phasing damage to the motor.
Key ratings and what they mean for fit
Breaking capacity: 100 kA at 400 V AC and at 240 V AC — that is the maximum fault current this breaker can safely interrupt. In most industrial panels fed by a 400 V transformer, this means it can clear a bolted fault without needing an upstream current-limiting fuse. The screw-type terminals on the main circuit accept up to 2x 4 mm² solid or stranded wire, which covers the typical motor feeder up to around 7.5 kW at 400 V. Mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, in any position — no orientation restrictions for derating. Dimensions: 45 mm wide, 97 mm deep, 97 mm tall — a standard 4-module width on the rail, leaving room for auxiliary contact blocks or a shunt trip alongside.
Sourcing and lifecycle
For a BOM freeze or a line-down replacement, this part is specified-to-order; we source it against an RFQ and confirm lead time at that point.