Thermal overload relay 57...75 A for motor protection, size S3, CLASS 10. Main circuit connection: screw, auxiliary circuit connection: screw, manual-automatic RESET. The thermal overload relay SIRIUS 3RU2 provides current-dependent protection for consumers with normal starting against excessive heating due to overload or phase failure. This series is particularly flexible and cost-effective. Worldwide approvals (e.g., IEC and UL/CSA) and applications in explosion-hazardous environments (ATEX or IEC Ex) are standard. Available with various setting ranges for the overload relay. They come with screw or spring connection for quick, maintenance-free, and vibration-resistant connections, as well as for standalone installation. The accessories are compatible across all sizes from S00 to S3. Simple, efficient, always up-to-date - the SIRIUS system modular concept.