Siemens 3RV2721-4CD10

Circuit breaker size S0 for system protection with approval circuit-breaker UL 489, CSA C22.2 No. 5-02 A-trip 22 A N-trip 286 A screw connection. Standard switching capacity of SIRIUS 3RV2 circuit breakers for system protection according to UL 489/CSA C22.2 No. 5 for short-circuit protection of systems and consumers in installations designed according to UL standards. 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. 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 terminal connections for quick, maintenance-free, and vibration-resistant connections, and optionally with built-in auxiliary switches. The comprehensive accessories, such as auxiliary switches, auxiliary trip devices, signaling switches, etc., are uniform across all sizes. The use of various power supply options, such as the associated power supply system SIRIUS 3RV29, 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.