Product Description

Siemens Thermal Overload Relay 70–100 A, Class 10, Size S6, Separate Mounting – 3RU2156-5BW10-8K

Product Description

The Siemens 3RU2156-5BW10-8K is a genuine SIRIUS 3RU Thermal Overload Relay designed to provide reliable overload and phase-failure protection for three-phase induction motors. Featuring an adjustable current range of 70–100 A, Class 10 tripping characteristic, and Size S6 frame, this relay is suitable for motors up to 45 kW. Designed for separate mounting, it includes busbar connections for the main circuit, screw terminals for the auxiliary circuit, and manual/automatic reset functionality for flexible and dependable motor protection.

The 3RU2156-5BW10-8K is widely used in Motor Control Centers (MCCs), industrial control panels, OEM machinery, pumps, compressors, conveyors, HVAC systems, water treatment plants, and manufacturing facilities. Its precise thermal tripping mechanism protects motors against overload conditions, helping reduce equipment damage, minimize downtime, and extend motor life. The robust Siemens SIRIUS design ensures reliable performance even in demanding industrial environments.

At SB Smart, Faridabad, we supply 100% genuine Siemens SIRIUS Thermal Overload Relays, Contactors, MPCBs, Soft Starters, MCCBs, MCBs, PLCs, HMIs, VFDs, and Industrial Automation Products at competitive prices. We offer GST invoices, expert technical support, bulk order pricing, secure packaging, and fast delivery across Faridabad, Delhi NCR, Mumbai, Pune, Bengaluru, Chennai, Hyderabad, Ahmedabad, Kolkata, and all major cities in India.

Key Features

• Genuine Siemens SIRIUS Thermal Overload Relay
• Model: 3RU2156-5BW10-8K
• Adjustable Current Range: 70–100 A
• Motor Rating: Up to 45 kW
• Class 10 Tripping Characteristic
• Size S6
• Separate Mounting Design
• Main Circuit: Busbar Connection
• Auxiliary Circuit: Screw Terminal
• Manual and Automatic Reset
• Reliable Overload and Phase Failure Protection
• Rugged Industrial Construction
• Long Service Life

Applications

• Motor Control Centers (MCC)
• Industrial Control Panels
• OEM Machinery
• Pumps and Compressors
• Conveyor Systems
• HVAC Systems
• Water Treatment Plants
• Manufacturing Facilities
• Process Industries
• Industrial Automation Systems

Benefits

• Protects motors against overload and phase-failure conditions
• Reduces motor damage and costly downtime
• Adjustable current setting for flexible motor applications
• Accurate Class 10 thermal tripping
• Easy separate mounting installation
• Reliable performance in harsh industrial environments
• Low maintenance with long service life
• Genuine Siemens quality for dependable operation

Frequently Asked Questions (FAQs)

Q1. What is the Siemens 3RU2156-5BW10-8K used for?

The 3RU2156-5BW10-8K is a thermal overload relay designed to protect three-phase motors from overload and phase-failure conditions in industrial applications.

Q2. What is the adjustable current range of this overload relay?

It features an adjustable current setting of 70–100 A, making it suitable for protecting motors up to 45 kW.

Q3. What type of mounting and terminals does it use?

The relay is designed for separate mounting, with busbar connections for the main circuit and screw terminals for the auxiliary circuit.

Q4. Does this overload relay support manual and automatic reset?

Yes. The 3RU2156-5BW10-8K supports both manual and automatic reset, providing flexible operation and simplified maintenance.

Q5. Why buy Siemens 3RU2156-5BW10-8K from SB Smart Faridabad?

SB Smart, Faridabad supplies 100% genuine Siemens industrial automation products with competitive pricing, GST invoices, expert technical support, bulk order assistance, and fast delivery across India for OEMs, panel builders, contractors, and industrial customers.