The Siemens SIRIUS 3RV2131-4KA10 Motor Protection Circuit Breaker (MPCB) is a premium industrial protection device designed for motor overload protection, short-circuit protection, phase failure protection, and safe electrical isolation. Part of the renowned Siemens SIRIUS 3RV2 series, this Size S2 Motor Protection Circuit Breaker integrates a Class 10 thermal overload relay and magnetic short-circuit trip into a single compact unit, making it the ideal choice for motor control centers (MCC), industrial automation, OEM machinery, process plants, manufacturing facilities, and electrical distribution panels.
The 3RV2131-4KA10 features an adjustable thermal overload current range of 62–73A, a 949A magnetic short-circuit release, 3-pole configuration, screw terminal connections, and standard switching capacity. It supports operating voltages up to 690V AC and is engineered to provide dependable protection for three-phase motors against overload, locked rotor conditions, and short-circuit faults while reducing downtime and extending equipment life.
Designed for continuous industrial operation, the Siemens 3RV2131-4KA10 MPCB integrates seamlessly with Siemens SIRIUS contactors to create compact motor starter combinations. It is widely used in pump control panels, compressors, conveyors, HVAC systems, mining equipment, water treatment plants, packaging machinery, cement plants, steel industries, food processing plants, and factory automation systems where reliable motor protection is essential. With high breaking capacity, robust construction, and long mechanical life, it is a preferred solution for demanding industrial environments.
At SB Smart, we supply 100% genuine Siemens SIRIUS Motor Protection Circuit Breakers (MPCB), contactors, overload relays, soft starters, MCCBs, MCBs, and industrial automation products at competitive prices with expert technical support, GST billing, bulk order assistance, and fast PAN India delivery.
Genuine Siemens SIRIUS 3RV2 Motor Protection Circuit Breaker
Model: 3RV2131-4KA10
Frame Size: S2
Adjustable Thermal Overload Range: 62–73A
Magnetic Short-Circuit Release: 949A
Class 10 Thermal Overload Protection
Standard Switching Capacity
3-Pole Configuration
Screw Terminal Connections
Rated Operating Voltage up to 690V AC
Integrated Overload, Phase Failure & Short-Circuit Protection
High Breaking Capacity
Compact Industrial Design
Long Mechanical & Electrical Service Life
Compatible with Siemens SIRIUS Contactors and Starter Combinations
Motor Control Centers (MCC)
Industrial Automation Panels
Motor Starter Assemblies
Pump Control Panels
Compressors
Conveyor Systems
HVAC Systems
Water Treatment Plants
Mining Equipment
Cement Plants
Steel Industries
Packaging Machinery
Manufacturing Facilities
OEM Electrical Panels
Protects motors from overload and short-circuit faults
Integrated thermal overload relay reduces panel components
Detects phase failure to enhance motor safety
Minimizes equipment downtime and maintenance costs
Compact design saves control panel space
Ensures reliable motor starting and operation
Easy installation with screw terminals
Long service life for industrial applications
Ideal for continuous-duty industrial motors
100% Genuine Siemens Products
Best Siemens MPCB Price in India
Expert Technical Support
Bulk Order Assistance
Fast PAN India Delivery
Secure Packaging
GST Invoice Available
Trusted Industrial Electrical Supplier
Reliable After-Sales Support
The Siemens 3RV2131-4KA10 is a Motor Protection Circuit Breaker (MPCB) used to protect three-phase motors against overload, short-circuit, and phase failure while providing safe electrical isolation.
The breaker provides an adjustable thermal overload setting from 62A to 73A.
It features a 949A magnetic short-circuit release for rapid fault interruption and enhanced motor protection.
Yes. The 3RV2131-4KA10 is designed for starter combinations and integrates perfectly with compatible Siemens SIRIUS contactors.
This circuit breaker uses screw terminal connections, ensuring secure and reliable wiring for industrial control panels.
Yes. SB Smart supplies 100% genuine Siemens SIRIUS Motor Protection Circuit Breakers with competitive pricing, technical support, GST invoices, and fast delivery across India.
| Parameter | Specification |
|---|---|
| Brand | Siemens |
| Series | SIRIUS 3RV2 |
| Model Number | 3RV2131-4KA10 |
| Product Type | Motor Protection Circuit Breaker |
| Function | Motor Protection with Overload Relay Function |
| Frame Size | S2 |
| Tripping Class | Class 10 |
| Thermal Overload Release (A-Release) | 62.00–73.00 A |
| Short-Circuit Release (N-Release) | 949 A |
| Number of Poles | 3 |
| Rated Operational Voltage | 20–690 V AC |
| Rated Current | 73 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 | 20,000 Operating Cycles |
| Electrical Endurance | 20,000 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 | 1.235 kg |
| Mounting | DIN Rail / Panel Mounting |
| Application | Motor Overload and Short-Circuit Protection |
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