Siemens Thermal Overload Relay 70–80 A, Class 10A, Size S2, Contactor Mounting – 3RU2136-4RB00-8K

Product Description

The Siemens 3RU2136-4RB00-8K is a genuine SIRIUS 3RU2 Thermal Overload Relay engineered to provide reliable overload and phase-failure protection for three-phase induction motors. It features an adjustable current range of 70–80 A, Class 10A tripping characteristic, and a Size S2 frame, making it ideal for demanding industrial motor protection applications. Designed for direct contactor mounting, this relay integrates seamlessly with compatible Siemens S2 contactors to create a compact and efficient motor starter assembly. It includes screw terminals for both the main and auxiliary circuits and supports manual and automatic reset for easy operation and maintenance.

The Siemens 3RU2136-4RB00-8K is widely used in Motor Control Centers (MCCs), industrial control panels, OEM machinery, pumps, compressors, conveyor systems, HVAC equipment, water treatment plants, and manufacturing facilities. Its temperature-compensated thermal protection accurately detects overload and phase-failure conditions, helping reduce motor damage, minimize downtime, and improve overall equipment reliability.

At SB Smart, Faridabad, we supply 100% genuine Siemens SIRIUS Thermal Overload Relays, Contactors, Motor Protection Circuit Breakers (MPCB), Soft Starters, MCCBs, MCBs, PLCs, HMIs, VFDs, and Industrial Automation Products at competitive prices. We provide 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 3RU2 Thermal Overload Relay
• Model: 3RU2136-4RB00-8K
• Adjustable Current Range: 70–80 A
• Class 10A Tripping Characteristic
• Size S2
• Direct Contactor Mounting
• Main Circuit: Screw Terminal
• Auxiliary Circuit: Screw Terminal
• Manual and Automatic Reset
• Phase Failure Sensitive Protection
• Temperature-Compensated Operation
• Compact and Durable Industrial Design
• Long Service Life

Applications

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

Benefits

• Protects motors against overload and phase failure
• Extends motor service life
• Minimizes unplanned downtime
• Compact contactor-mounted design saves panel space
• Quick and easy installation
• Accurate Class 10A thermal tripping
• Reliable performance in demanding industrial environments
• Genuine Siemens quality for long-lasting operation

Frequently Asked Questions (FAQs)

Q1. What is the Siemens 3RU2136-4RB00-8K used for?

The 3RU2136-4RB00-8K is a thermal overload relay designed to protect three-phase motors from overload and phase-failure conditions. It is intended for direct mounting on Siemens S2 contactors.

Q2. What is the adjustable current range?

The relay offers an adjustable overload setting from 70 A to 80 A, making it suitable for various industrial motor applications.

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

It is designed for direct contactor mounting and features screw terminals for both the main circuit and auxiliary circuit.

Q4. Does the relay support manual and automatic reset?

Yes. The 3RU2136-4RB00-8K supports both manual and automatic reset, providing flexible operation and simplified maintenance.

Q5. Why buy Siemens 3RU2136-4RB00-8K from SB Smart Faridabad?

SB Smart, Faridabad supplies 100% genuine Siemens industrial automation products with competitive pricing, GST invoices, expert technical support, bulk order discounts, and fast delivery across India.