The Siemens 3RV2011-1CA20-ZX95 is a SIRIUS motor protection circuit breaker designed for motor protection, with a CLASS 10 trip characteristic. It mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715, making it a direct fit for standard control panels. The spring-loaded terminals on the main current circuit accept 2x (0.5... 4 mm²) solid or stranded wire, so no lug crimping is needed for typical motor branch circuits.
Breaking capacity and coordination
Rated breaking capacity hits 100 kA at 240 V, 400 V, and 500 V, dropping to 10 kA at 690 V. That 100 kA at 400 V means it can interrupt a high-fault bolted short without upstream fuses needing to clear — saves a fuse holder and a spare SKU on the shelf. The gL/gG fuse coordination values are 25 A at 400 V and 500 V, 20 A at 690 V, so if you do back it with fuses for a higher SCCR, those are the maximum ratings.
Integration and environment
Width is 45 mm, depth 97 mm, height 106 mm — that's a single 45 mm module on the DIN rail, leaving room alongside contactors or overloads. Mounting position any, so vertical or horizontal panel layouts work. Operating temperature range -20... +60 °C covers most indoor industrial enclosures; storage range -50... +80 °C handles unheated warehouses. Phase failure detection is built in, so a lost phase trips the breaker before the motor single-phases and cooks the winding.