Product Description

Siemens Thermal Overload Relay, SIRIUS 3RU2 Series, Motor Protection Relay, Variant KB0 – 3RU2136-4KB0

Product Description

The Siemens 3RU2136-4KB0 is a genuine SIRIUS 3RU2 Thermal Overload Relay designed to provide reliable motor overload and phase-failure protection for three-phase induction motors. This Variant KB0 model features an adjustable current range of 62–73 A, Class 10A tripping characteristic, and Size S2 frame, making it ideal for protecting industrial motors from overheating and overload conditions. It is designed for direct contactor mounting with compatible Siemens S2 contactors, ensuring a compact and space-saving motor starter solution. The relay includes screw terminals, manual/automatic reset, and temperature-compensated operation for dependable performance in demanding industrial environments.

The Siemens 3RU2136-4KB0 is widely used in motor control centers (MCCs), industrial control panels, pumps, compressors, conveyors, HVAC systems, water treatment plants, OEM machinery, and manufacturing facilities. Its precise thermal protection helps prevent costly motor failures, minimizes downtime, and extends equipment life, making it a trusted choice for industrial motor protection.

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, technical support, bulk order discounts, 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: 3RU2136-4KB0
• Variant: KB0
• Adjustable Current Range: 62–73 A
• Class 10A Thermal Tripping
• Size S2
• Direct Contactor Mounting
• Main & Auxiliary Circuit: Screw Terminals
• Manual and Automatic Reset
• Phase Failure Sensitive Protection
• Temperature-Compensated Operation
• Compact and Robust Industrial Design
• Long Service Life

Applications

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

Benefits

• Protects motors from overload and phase failure
• Extends motor life and improves reliability
• Reduces maintenance and unexpected downtime
• Compact contactor-mounted design saves panel space
• Easy installation and operation
• Accurate Class 10A tripping performance
• Suitable for demanding industrial applications
• Genuine Siemens quality for long-term performance

Frequently Asked Questions (FAQs)

Q1. What is the Siemens 3RU2136-4KB0 used for?

The Siemens 3RU2136-4KB0 is a SIRIUS 3RU2 thermal overload relay used to protect three-phase motors against overload and phase-failure conditions.

Q2. What is the current adjustment range?

The relay offers an adjustable current range of 62 A to 73 A, suitable for medium and heavy-duty industrial motors.

Q3. What type of mounting does it support?

It is designed for direct contactor mounting on compatible Siemens S2 contactors, providing a compact motor starter assembly.

Q4. Does the relay support manual and automatic reset?

Yes. The 3RU2136-4KB0 supports both manual and automatic reset, offering flexibility for different industrial applications.

Q5. Why buy Siemens 3RU2136-4KB0 from SB Smart Faridabad?

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