SIRIUS 3RV1011-0DA20-ZX95 — Motor Protection Circuit Breaker, 0.32 A, Class 10
This Siemens SIRIUS 3RV1011-0DA20-ZX95 is a three-pole motor protection circuit breaker rated at a continuous current of 0.32 A, designed to protect a 0.09 kW motor at 400 V AC. It is a current-production part (lifecycle stage: current). The 100 kA breaking capacity holds at 240 V, 400 V, 500 V, and 690 V AC — meaning it can interrupt a bolted fault at any of those voltages without upstream fuses needing to clear first. That keeps the coordination simple in a panel with a 100 kA SCCR bus.
Trip Class and Motor Starting
Trip Class 10 means the breaker will trip within 10 seconds at 7.2× the rated current — fast enough to protect a standard induction motor during a locked-rotor event without nuisance-tripping on a normal start. Phase failure detection is built in, so if one phase drops on a three-phase motor, the breaker opens before the motor single-phases to failure. Ground fault detection is not included — that stays external.
Mounting and Wiring
Snaps onto 35 mm DIN rail per DIN EN 50022. Mounting position is any, which helps when panel layout forces a horizontal or inverted orientation. The 45 mm width and 81 mm depth mean it fits a standard 45 mm module slot. Main and auxiliary/control circuits both use spring-loaded terminals — no screw torque to verify, just strip and push. Solid wire range is 2x (0.25 to 2.5 mm²); finely stranded with ferrule is 2x (0.25 to 1.5 mm²). Finger-safe touch protection is built into the front IP20 face — safe for live panel access with the cover on.
Thermal and Environmental Limits
Operating temperature range is -20 to +60 °C; storage and transport range is -50 to +80 °C. Power dissipation at rated current in hot operating state is 5.5 W total, 1.8 W per pole — relevant for thermal management in a sealed enclosure. Shock resistance is 25 g for 11 ms, typical for industrial panel mounting on a machine frame. The operating frequency at AC-3 duty is 15 operations per hour maximum — not a high-cycling application; for frequent starts, look at a contactor with a higher rated operating frequency.