Circuit breaker size S3 for motor protection, CLASS 20 A release 57...75 A N-release 975 A screw connection with increased switching capacity of 100 kA. The SIRIUS 3RV2 circuit breakers are designed for motor protection to safely disconnect in case of short circuits and to protect consumers and systems from overload, as well as to ensure safe separation 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 they are naturally suitable for IE3/IE4 motors and equally for switching direct current. Worldwide approvals and applications in explosion-prone environments are a given. 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 optionally with an integrated auxiliary switch. The comprehensive accessories, such as auxiliary switches, auxiliary releases, signaling switches, etc., are uniform across all sizes. The use of various energy supply options, such as the associated supply system SIRIUS 3RV29, significantly reduces the main circuit wiring. The 3RV2 circuit breakers replace the proven series 3RV1. Simple, efficient, always up to date - the SIRIUS system modular design.