Product Description

The Siemens 3RU2146-4JB00-8K is a genuine SIRIUS 3RU2 Thermal Overload Relay designed to provide reliable overload and phase-failure protection for three-phase induction motors. With an adjustable current range of 45–63 A, Class 10 tripping characteristic, and Size S3 frame, this thermal overload relay ensures accurate motor protection against overheating caused by overload conditions. It is designed for direct contactor mounting, allowing the relay to be installed directly with compatible Siemens S3 contactors to create a compact and space-saving motor starter assembly. The relay features screw terminals for both the main and auxiliary circuits and supports manual and automatic reset for convenient operation and maintenance.

The Siemens 3RU2146-4JB00-8K is widely used in Motor Control Centers (MCCs), industrial control panels, OEM machinery, pumps, compressors, conveyor systems, HVAC equipment, water treatment plants, and manufacturing industries. Its temperature-compensated thermal protection provides dependable tripping performance while minimizing nuisance trips caused by ambient temperature variations. This helps extend motor life, reduce downtime, and improve overall system reliability in demanding industrial environments.

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: 3RU2146-4JB00-8K
• Adjustable Current Range: 45–63 A
• Class 10 Tripping Characteristic
• Size S3
• 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
• Reduces motor damage and unexpected downtime
• Extends motor service life
• Compact contactor-mounted design saves panel space
• Quick and easy installation
• Accurate Class 10 thermal protection
• Reliable performance in harsh industrial environments
• Genuine Siemens quality for long-term operation

Frequently Asked Questions (FAQs)

Q1. What is the Siemens 3RU2146-4JB00-8K used for?

The 3RU2146-4JB00-8K is a thermal overload relay designed to protect three-phase motors against overload and phase-failure conditions. It is intended for direct mounting on compatible Siemens S3 contactors.

Q2. What is the adjustable current range?

This overload relay has an adjustable current range of 45 A to 63 A, making it suitable for a wide variety of industrial motor protection applications.

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

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

Q4. Does the Siemens 3RU2146-4JB00-8K support manual and automatic reset?

Yes. The relay supports both manual and automatic reset, allowing flexible operation based on application requirements.

Q5. Why buy Siemens 3RU2146-4JB00-8K 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 for OEMs, panel builders, contractors, and industrial customers.