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.
Panel fit and mounting
Snaps onto 35 mm DIN rail per EN 50022 with a screw and snap-on mechanism; the 45 mm width and 90 mm height leave room for auxiliary contact blocks on the side (the product extension auxiliary switch is supported). 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; IP20 finger-safe protection on the front means it's safe to touch inside a live panel, though the terminals themselves are not sealed against dust or moisture.
Environmental and compliance notes
Operating temperature range is -20 to +60 °C; storage and transport range is -50 to +80 °C. 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.