Overload relay 160...630 A for motor protection, size S10/S12, CLASS 5...30E contactor mounting/standalone installation. Main circuit: rail connection. Auxiliary circuit: screw connection. Manual-automatic reset, internal earth fault detection. Electronic overload relay SIRIUS 3RB2 for current-dependent protection of consumers with normal and heavy starting against unacceptable overheating due to overload, phase asymmetry, or phase failure. With large current setting ranges and different tripping characteristics, only a few types cover entire series of motors. With their low power loss, they are particularly energy-efficient and contribute to lower heating in the control cabinet. Global approvals (e.g., IEC and UL/CSA) and applications in explosion-hazardous environments (ATEX) are standard. The version 3RB21 offers extended functionalities such as an integrated electrical remote reset, earth fault detection, and more. Available with various setting ranges for the overload relay and different tripping classes. They come with screw or spring-loaded connections for quick, maintenance-free, and vibration-resistant installation, as well as for standalone use. The accessories are compatible across all sizes from S6 to S12. Simple, efficient, always up-to-date - the SIRIUS system modular design.