SIRIUS 3RV1011-0CA10-ZW98 — motor protection circuit breaker
The Siemens SIRIUS 3RV1011-0CA10-ZW98 is a motor protection circuit breaker designed for the main current circuit, with screw-type terminals and a Trip Class 10 thermal-magnetic trip curve. It covers a rated voltage range of 20 to 690 V and delivers a 100 kA breaking capacity at 400 V AC — the same rating holds at 240 V, 500 V, and 690 V, so the interrupting performance does not degrade as line voltage rises within that band.
What the key ratings mean for fit
Trip Class 10 means the breaker will trip within 10 seconds at 7.2× the thermal setting — standard for protecting standard induction motors during a locked-rotor event. The 100 kA SCCR at 400 V means it safely interrupts faults up to that level without upstream fuses or a larger breaker needing to clear first, which simplifies panel coordination. Phase failure detection is built in, so the breaker will trip on loss of one phase, preventing single-phasing damage to the motor. The 45 mm width and 75 mm depth fit a standard 35 mm DIN rail per DIN EN 60715, with screw and snap-on mounting. Clearance requirements: 20 mm upward, 20 mm downward, 9 mm to the side, and zero forward or backward — so it can sit tight against a backplate or enclosure wall.
Where this class is used
Motor protection circuit breakers of this class are installed in motor control centers and distribution panels to provide short-circuit and overload protection for individual motor loads — pumps, fans, compressors, conveyors. The combination of thermal overload (Trip Class 10) and magnetic short-circuit release in one device eliminates the need for a separate overload relay and fuse combination on many motor starters.