Product Description

Siemens SIRIUS Motor Protection Circuit Breaker S2 32–40A Class 20 (Variant UB10) – 3RV2031-4UB10

Product Description

The Siemens SIRIUS 3RV2031-4UB10 Motor Protection Circuit Breaker (MPCB) is a premium industrial protection device engineered to provide motor overload protection, short-circuit protection, phase failure protection, and safe electrical isolation for three-phase motors. Part of the globally trusted Siemens SIRIUS 3RV2 Series, this Size S2 Motor Protection Circuit Breaker features Class 20 thermal overload protection with an adjustable 32–40A current range and a 585A magnetic short-circuit release, making it ideal for demanding industrial motor control applications. It is designed to safeguard motors, starters, and electrical equipment while minimizing downtime and extending equipment life.

The 3RV2031-4UB10 (Variant UB10) is equipped with 3-pole construction, screw terminal connections, and standard switching capacity, ensuring secure wiring and dependable operation in industrial environments. Designed for systems up to 690V AC, it integrates seamlessly with Siemens SIRIUS contactors to create compact Direct-On-Line (DOL) starters, Star-Delta starters, and complete motor starter assemblies. Its compact S2 frame reduces panel space while providing high mechanical and electrical endurance for continuous operation.

The Siemens 3RV2031-4UB10 is widely used in Motor Control Centers (MCC), industrial automation systems, pump control panels, compressors, conveyor systems, HVAC installations, process industries, water treatment plants, packaging machinery, mining, cement plants, steel industries, OEM equipment, and factory automation. Its reliable thermal-magnetic protection and Siemens engineering ensure maximum motor safety, improved operational efficiency, and reduced maintenance costs.

At SB Smart, we supply 100% genuine Siemens SIRIUS Motor Protection Circuit Breakers, contactors, overload relays, soft starters, MCCBs, MCBs, and industrial automation products with competitive pricing, technical support, GST billing, bulk order assistance, and fast PAN India delivery.

Key Features

• Genuine Siemens SIRIUS 3RV2 Motor Protection Circuit Breaker

• Model: 3RV2031-4UB10

• Variant: UB10

• Frame Size: S2

• Adjustable Thermal Overload Range: 32–40A

• Magnetic Short-Circuit Release: 585A

• Class 20 Thermal Overload Protection

• Standard Switching Capacity

• 3-Pole Configuration

• Screw Terminal Connections

• Rated Operating Voltage: Up to 690V AC

• Phase Failure Protection

• Compact Industrial Design

• Compatible with Siemens SIRIUS Contactors

• High Mechanical & Electrical Durability

• Suitable for DOL and Star-Delta Motor Starter Applications

Applications

• Motor Control Centers (MCC)

• Industrial Automation Systems

• DOL Motor Starters

• Star-Delta Starter Panels

• Pump Control Panels

• Compressors

• Conveyor Systems

• HVAC Systems

• Water Treatment Plants

• Mining & Cement Industries

• Steel Plants

• Packaging Machinery

• OEM Electrical Panels

• Factory Automation

Benefits

• Reliable protection against overload and short-circuit faults

• Class 20 thermal protection for demanding motor applications

• Integrated motor protection reduces panel components

• Fast magnetic trip minimizes damage during fault conditions

• Compact S2 frame saves panel space

• Secure screw terminal connections for easy installation

• Reduces maintenance costs and equipment downtime

• Long mechanical and electrical service life

• Improves motor reliability and operational safety

Why Buy Siemens 3RV2031-4UB10 from SB Smart?

• 100% Genuine Siemens Products

• Competitive Industrial Pricing

• Expert Technical Support

• Bulk Order Assistance

• Fast PAN India Delivery

• Secure Packaging

• GST Invoice Available

• Trusted Industrial Electrical Supplier

• Reliable After-Sales Support

Frequently Asked Questions (FAQs)

Q1. What is Siemens 3RV2031-4UB10 used for?

The Siemens 3RV2031-4UB10 is a Motor Protection Circuit Breaker (MPCB) designed to protect three-phase motors against overload, phase failure, and short-circuit faults while providing safe isolation.

Q2. What is the adjustable current range?

The breaker provides an adjustable thermal overload setting from 32A to 40A, suitable for medium-power industrial motors.

Q3. What is the short-circuit release rating?

It features a 585A magnetic short-circuit release for rapid interruption of fault currents and dependable motor protection.

Q4. Is this breaker compatible with Siemens contactors?

Yes. It is fully compatible with Siemens SIRIUS contactors for DOL starters, Star-Delta starters, and motor starter combinations.

Q5. What type of terminals does it use?

The breaker uses screw terminal connections, providing secure and vibration-resistant wiring in industrial control panels.

Q6. Does SB Smart supply genuine Siemens 3RV2031-4UB10?

Yes. SB Smart supplies 100% genuine Siemens SIRIUS Motor Protection Circuit Breakers with competitive pricing, technical support, GST invoices, and fast delivery across India.