Circuit breaker size S3 for motor protection, CLASS 10 A release 80...100 A N release 1300 A screw connection. Standard switching capacity circuit breakers SIRIUS 3RV2 for motor protection to safely disconnect in case of short circuits and to protect consumers and systems from overload, as well as to safely isolate 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 for switching direct current. Global approvals (e.g., IEC and UL/CSA) and applications in explosion hazardous environments (ATEX or IEC Ex) are standard. Device 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 terminals for a quick, maintenance-free, and vibration-resistant connection, and optionally 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 feed options, such as the associated feed system SIRIUS 3RV29, significantly reduces the main circuit wiring. The circuit breakers 3RV2 replace the proven series 3RV1. Simple, efficient, always up to date - the SIRIUS system modular concept.