The Siemens 3RV2411-1AA20-0DA0 is a SIRIUS 3RV2 motor starter protector sized S00, designed specifically for transformer protection. It carries an A-release adjustable from 1.1 to 1.6 A and a fixed short-circuit release of 33 A, with spring-loaded terminals for fast panel wiring. This is a standard switching-capacity unit — no phase-failure protection built in, so it's the right-sized spec for transformer primary-side protection where phase-loss monitoring is handled upstream or by the load itself.
RoHS compliant since October 2009.
