3RV2021-4DA10 – Siemens SIRIUS Circuit Breaker for Motor Protection, 18-25A, In Stock
Buy the Siemens 3RV2021-4DA10, a SIRIUS 3RV2 circuit breaker Size S0 for motor protection, CLASS 10, with 18-25 A thermal overload (A-release) and 325 A instantaneous overcurrent (N-release), screw terminal, standard switching capacity. In stock and available for fast shipping. Get a quote today.
Key Technical Specifications
- Product Type: 3RV2 circuit breaker, for motor protection
- Circuit Breaker Size: S0 (combinable with contactor sizes S00, S0)
- Trip Class: CLASS 10
- Thermal Overload Release (A-release): 18–25 A
- Instantaneous Overcurrent Release (N-release): 325 A
- Terminal Type: Screw terminal
- Switching Capacity: Standard
- Rated Voltage: 690 VAC
- Rated Power: 22 kW (400 VAC)
- Breaking Capacity: 4 kA (interrupt rating)
- Disconnector Functionality: Yes
- Power Loss (AC hot operating state): 10.5 W total; 3.5 W per pole
- Rated Impulse Withstand Voltage (Uimp): 6 kV
- Rated Insulation Voltage: 690 V
- Enclosure Rating: IP20
- Ambient Temperature (Operation): -20°C to 60°C
- Ambient Temperature (Storage/Transport): -50°C to 80°C
- Shock Resistance: 25g / 11 ms
- Dimensions (H x W x D): 97 x 45 x 97 mm
Design and Performance
Compact, Current-Limiting Protection up to 11 kW
Sized for load feeders up to 11 kW at AC-3/400 V, this circuit breaker is ideally suited for the protection of motors, combining an adjustable 18-25 A overload range with 325 A short-circuit protection in a compact S0 frame.
Optimized for Low Heat Loss
Minimization of energy losses through optimization of the bimetal trip units reduces inherent power loss and heating of the control cabinet, allowing smaller control cabinet air conditioners to be used.
Reliable Motor Protection for Higher-Power Load Feeders
Part of the SIRIUS 3RV2 range used for switching and protecting 3-phase motors up to 18.5 kW at 400 VAC and other loads with rated currents up to 40 A, this S0-size breaker extends coverage to higher-power motor applications than the smaller S00 frame.
Rugged Design for Demanding Environments
Rated for shock resistance of 25g/11ms and an extended storage/transport temperature range of -50°C to 80°C, this breaker supports reliable performance across a wide range of industrial and transport conditions.
Modular SIRIUS Compatibility
Part of the SIRIUS modular system, this circuit breaker combines with S00 or S0 size contactors and the SIRIUS 3RV29 infeed system, reducing main circuit wiring and simplifying load feeder assembly.
Why Buy the 3RV2021-4DA10 From Us
- In stock and ready for immediate dispatch
- Fast shipping on every order
- Commercial advisory support to help you confirm the right SIRIUS 3RV2 configuration for your motor
- Competitive pricing — get a quote in minutes
