The Siemens SIRIUS 3RV2121-4BA10 Motor Protection Circuit Breaker (MPCB) is designed for reliable protection of three-phase motors against overload, short circuit, and phase failure. It features an integrated overload relay function with an adjustable thermal overload release range of 13.00–20.00 A and a fixed short-circuit release of 260 A. The compact Size S0 design with Class 10 tripping characteristics, screw terminal connection, and standard switching capacity provides dependable motor protection for industrial automation systems, control panels, and machine applications.
| Parameter | Specification |
|---|---|
| Brand | Siemens |
| Series | SIRIUS 3RV2 |
| Model Number | 3RV2121-4BA10 |
| Product Type | Motor Protection Circuit Breaker |
| Function | Motor Protection with Overload Relay Function |
| Frame Size | S0 |
| Tripping Class | Class 10 |
| Thermal Overload Release (A-Release) | 13.00–20.00 A |
| Short-Circuit Release (N-Release) | 260 A |
| Number of Poles | 3 |
| Rated Operational Voltage | 20–690 V AC |
| Rated Operational Current | 20 A |
| Rated Insulation Voltage | 690 V |
| Rated Impulse Withstand Voltage | 6 kV |
| Frequency | 50/60 Hz |
| Connection Type | Screw Terminal |
| Switching Capacity | Standard |
| Degree of Protection | IP20 |
| Mechanical Endurance | 100,000 Operating Cycles |
| Electrical Endurance | 100,000 Operating Cycles |
| Operating Temperature | -20°C to +60°C |
| Storage Temperature | -50°C to +80°C |
| Maximum Installation Altitude | 2000 m |
| Relative Humidity | 10–95% |
| Approximate Weight | 0.420 kg |
| Mounting | DIN Rail Mounting |
| Application | Motor Overload and Short-Circuit Protection |
No reviews yet.