Circuit breaker size S3 for motor protection, CLASS 10 A release 57...75 A N-release 975 A screw connection. Standard switching capacity of the SIRIUS 3RV2 circuit breakers for motor protection ensures safe disconnection in case of short circuits and protects consumers and installations from overload, as well as providing safe isolation of the system from the grid. The compact and climate-resistant circuit breakers are optimized for use in consumer branches due to their low heat dissipation, and are naturally suitable for IE3/IE4 motors and equally for switching direct current. Global approvals (e.g., IEC and UL/CSA) and applications in explosion-prone environments (ATEX or IEC Ex) are standard. Variants are available for motor protection (also with overload relay function), system protection, short circuit protection of starter combinations, transformer protection, as main and emergency stop switches, and for use in IT networks. They come with screw or spring-loaded connections for quick, maintenance-free, and vibration-resistant connections, and are optionally available with built-in auxiliary contacts. The comprehensive accessories, such as auxiliary contacts, auxiliary releases, signaling switches, etc., are uniform across all sizes. The use of various energy supply options, such as the associated SIRIUS 3RV29 supply system, significantly reduces the main circuit wiring. The 3RV2 circuit breakers replace the proven 3RV1 series. Simple, efficient, always up to date - the SIRIUS system modular design.