Transformer protection breaker built for the pit
The Siemens 3RV2411-0DA10 is a SIRIUS circuit breaker sized S00, designed specifically for transformer protection. Trip Class 10 means it rides through transformer inrush (typically 8–12× rated) without nuisance tripping, then clears a hard fault inside 10 seconds at 7.2× Ie. The 45 mm width (three module spaces) fits standard panel layouts. Any mounting position allowed — no derating needed for horizontal or inverted install.
Coordination with peer frame sizes
Compared to the 3RV2011-0AA10 (size S00, motor protection, 100 kA at 400 V), the 3RV2411-0DA10 shares the same frame footprint and DIN-rail clip pattern — it drops into the same panel cutout without rewiring. The deciding difference is the trip curve: the 3RV2411-0DA10 is calibrated for transformer inrush (higher magnetic pickup), while the 3RV2011-0AA10 is set for motor starting. Swap them only if the load type matches.
