Circuit breaker size S0 for starter combinations. Rated current 1.6 A, N-trip 21 A, screw connection. Standard switching capacity of SIRIUS 3RV2 circuit breakers for starter combinations ensures safe protection of consumers in case of short circuits and safe disconnection from the power supply. 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 as well as for switching direct current. Global approvals (e.g., IEC and UL/CSA) and applications in explosion-prone environments (ATEX or IEC Ex) are standard. Device variants are available for motor protection (also with overload relay function), plant protection, short-circuit protection for starter combinations, transformer protection, as main and emergency stop switches, and for use in IT networks. They come with screw or spring terminals for quick, maintenance-free, and vibration-resistant connections, and optionally with built-in auxiliary contacts. The comprehensive accessories, such as auxiliary contacts, auxiliary trip devices, signaling switches, etc., are uniform across all sizes. The use of various power supply options, such as the associated SIRIUS 3RV29 power 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 concept.