What this SIRIUS breaker does for a motor branch
The Siemens 3RV1011-0HA20-ZX95 is a SIRIUS motor-protection circuit breaker rated for 0.8 A continuous current with a Trip Class 10 thermal-magnetic curve — meaning it clears an overload before the motor windings exceed their thermal limit on a standard 10-second cold-start profile. Its 100 kA breaking capacity holds at 690 V AC, coordinating with upstream fuses or breakers in high-fault panels. Spring-loaded terminals on both the main and auxiliary/control circuits accept 2x (0.25 to 2.5 mm²) solid or 2x (0.25 to 1.5 mm²) finely stranded with ferrules — no screwdriver torque to verify, just strip and push.
Depth is 81 mm with zero clearance needed behind or at the sides, so it tucks into shallow enclosures without forcing a larger gland plate. Mounting position is any orientation;
The part is RoHS-compliant with a substance prohibition date of 01.01.2013 (the EU RoHS effective date). Phase-failure detection is built in; ground-fault detection is not. Surge voltage withstand is 6 kV, and shock resistance is 25 g for 11 ms — fine for most industrial panel environments.