The Siemens 3RV1011-1EA20-ZW96 is a SIRIUS motor protection circuit breaker rated for 4 A continuous current with a CLASS 10 trip characteristic. It interrupts faults up to 100 kA at 400 V AC, so it handles high-available-fault-current panels without needing an upstream current-limiting fuse for most installations. The 1.5 kW motor rating at 400 V matches a standard 2 HP induction motor on a 400 V line.
Mounting and wiring
Mounts on 35 mm DIN rail per EN 50022 — screw and snap-on, so it stays put under vibration. Spring-loaded terminals on the main circuit accept 2x (0.25 to 2.5 mm²) solid or 2x (0.25 to 1.5 mm²) finely stranded with ferrule. That's a standard panel wire range; no special crimp tool needed beyond the usual ferrule kit. The 45 mm width fits a standard 2.5-module slot on a DIN rail — keeps fill factor predictable.
Breaking capacity and coordination
Rated breaking capacity is 100 kA at 240 V and 400 V AC, dropping to 3 kA at 500 V and 2 kA at 690 V. At 400 V — the most common industrial distribution voltage — that 100 kA figure means it can sit downstream of a transformer with high fault current without needing a separate current-limiting fuse. Phase failure detection is built in, so it will trip on a lost phase, protecting the motor from single-phasing. No ground fault detection on this unit; that's a separate accessory.