The Siemens SIRIUS 3RV1011-0DA25 is a motor protection circuit breaker sized for small induction motors — 0.32 A continuous current and 0.09 kW at 400 V. The Class 10 trip curve means it clears a locked-rotor condition within 10 seconds at 7.2× rated current, which is the standard for standard-duty motor starting (pumps, fans, compressors). Phase failure detection is built in, so it will trip on a lost phase before the motor single-phases to failure.
Mounts on 35 mm DIN rail per EN 50022 — screw and snap-on. The 45 mm width takes one standard module slot; depth is 81 mm, so it clears a 100 mm deep enclosure without issue. Spring-loaded terminals on both main and auxiliary circuits accept 0.25–2.5 mm² solid or stranded (24–14 AWG). No special tools needed beyond a screwdriver for the release lever.
The closest functional sibling is the 3RV1011-0GA10. Both are SIRIUS motor protection breakers with the same 45 mm footprint and Class 10 trip. The 0GA10 carries a higher continuous current rating — check your motor FLA before substituting. The 0DA25 is the low-current variant for fractional-horsepower motors; if your BOM calls for 0.32 A, the 0GA10 will not hold the overload curve.