Siemens 3RV2021-4BA20 SIRIUS Circuit Breaker, Size S0 Motor Protector, 13-20A, Spring Terminal Original Brand New

Overview

The Siemens 3RV2021-4BA20 is a compact, current-limiting motor starter protector optimized for load feeders. As part of the SIRIUS modular system, this size S0 circuit breaker provides reliable protection against short circuits and overloads for three-phase motors up to 7.5 kW at 400V. Its spring-loaded terminals significantly reduce installation time and offer superior vibration resistance compared to traditional screw connections.

Key Benefit

• Maintenance-Free Wiring: Spring-type terminals ensure permanent contact pressure, even in high-vibration environments.

• Modular Versatility: Fully compatible with the Siemens SIRIUS 3RV2 accessory range, including auxiliary switches and undervoltage releases.

• High Reliability: CLASS 10 tripping characteristic ensures precise protection for standard motor starting conditions.

• Space-Saving Design: The S0 frame size allows for high-density mounting in control cabinets.

Technical Function

• Overload Protection: Adjustable thermal release range of 13…20 A.

• Short-Circuit Protection: Fixed magnetic trip (N-release) at 260 A.

• Switching Capacity: Standard switching capacity suitable for industrial power grids.

• Climate Suitability: Designed for use in worldwide applications with international certifications (IEC, UL, CSA).

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