Product Description

Siemens SIRIUS Power Contactor 51A, 22kW, 400V, 3-Pole, 24V DC, Size S2 – 3RT2036-1KB40

Product Description

The Siemens 3RT2036-1KB40 is a premium Power Contactor from the trusted SIRIUS 3RT2 series, designed for reliable switching and control of three-phase motors and industrial electrical loads. It features an AC-3e/AC-3 rating of 51A and is suitable for motors up to 22 kW at 400V. The contactor operates with a 24V DC control voltage and a control voltage tolerance of 0.8–1.2 × Uc. An integrated varistor provides effective coil surge suppression, while 1 NO + 1 NC auxiliary contacts support control, feedback, signaling, and interlocking functions. Siemens specifies this model as Size S2, with screw terminals and suitability for direct connection to PLC outputs.

The Siemens 3RT2036-1KB40 is suitable for three-phase motor control, Motor Control Centers (MCC), DOL starters, pump control systems, compressors, conveyor systems, HVAC equipment, industrial machinery, OEM control panels, and factory automation. Its compact S2 construction and PLC-compatible 24V DC coil make it suitable for modern industrial automation and motor-control panels.

At SB Smart, Faridabad, we supply 100% genuine Siemens SIRIUS contactors, motor protection circuit breakers, overload relays, soft starters, MCCBs, MCBs, and industrial automation products at competitive prices. We provide GST invoices, expert technical support, bulk order assistance, secure packaging, and fast delivery across Faridabad, Delhi NCR, and all major cities in India, making SB Smart a trusted supplier for industries, OEMs, panel builders, and electrical contractors.

Key Features

• Genuine Siemens SIRIUS 3RT2 Power Contactor

• Model: 3RT2036-1KB40

• Utilization Category: AC-3e/AC-3

• Rated Operational Current: 51A

• Motor Power: 22 kW at 400V

• Rated Operating Voltage: 400V

• 3-Pole Configuration

• Control Voltage: 24V DC

• Control Voltage Tolerance: 0.8–1.2 × Uc

• Integrated Varistor

• Auxiliary Contacts: 1 NO + 1 NC

• Screw Terminal Connections

• Contactor Size: S2

• Suitable for PLC Outputs

• Rated AC-3 Operational Current: 51A at 400V

• Rated AC-3 Motor Power: 22 kW at 400V

• Suitable for industrial motor switching

• Suitable for industrial automation and motor-control applications

Applications

• Motor Control Centers (MCC)

• Industrial Automation Panels

• DOL Motor Starters

• Three-Phase Motor Control

• Pump Control Panels

• Compressors

• Conveyor Systems

• HVAC Systems

• Manufacturing Machinery

• OEM Electrical Panels

• Machine Control Panels

• PLC-Controlled Motor Systems

• Factory Automation

Benefits

• Reliable 51A AC-3e/AC-3 motor switching

• Suitable for motors up to 22 kW at 400V

• Reliable 24V DC control operation

• 0.8–1.2 × Uc control voltage tolerance

• Integrated varistor helps suppress coil switching transients

• 1 NO + 1 NC auxiliary contacts for control and signaling

• Suitable for direct PLC output connection

• Robust 3-pole construction

• Secure screw terminal connections

• Compact and durable S2 design

• Suitable for demanding industrial applications

• Reliable Siemens SIRIUS performance

Frequently Asked Questions (FAQs)

Q1. What is Siemens 3RT2036-1KB40 used for?

The Siemens 3RT2036-1KB40 is a SIRIUS power contactor designed for switching and controlling three-phase motors and industrial electrical loads. It is rated at 51A AC-3e/AC-3 and supports motors up to 22 kW at 400V.

Q2. What is the rated current of 3RT2036-1KB40?

The contactor has a rated operational current of 51A in AC-3 applications at 400V.

Q3. What motor power can it handle?

The 3RT2036-1KB40 is suitable for motors up to 22 kW at 400V.

Q4. What is the control voltage?

The contactor operates with a 24V DC control voltage, with a control voltage range of 0.8–1.2 × Uc.

Q5. Does it have an integrated varistor?

Yes. The 3RT2036-1KB40 features an integrated varistor for coil surge suppression.

Q6. What auxiliary contacts are provided?

It includes 1 NO + 1 NC auxiliary contacts, which can be used for control, feedback, signaling, and electrical interlocking.

Q7. What type of terminals does it use?

The contactor uses screw terminal connections.

Q8. What is the contactor size?

The 3RT2036-1KB40 belongs to Size S2.

Q9. Is it suitable for PLC-controlled applications?

Yes. This model is specifically designed to be suitable for PLC outputs, making it useful for electronic controller and automation applications.

Q10. Is it suitable for DOL motor starters?

Yes. The contactor can be used in DOL motor starter assemblies with an appropriately selected motor protection device.

Q11. Where can Siemens 3RT2036-1KB40 be used?

It can be used in MCC panels, PLC-controlled motor systems, pumps, compressors, conveyors, HVAC equipment, manufacturing machinery, OEM panels, and factory automation applications.

Q12. Why buy Siemens 3RT2036-1KB40 from SB Smart Faridabad?

SB Smart, Faridabad supplies 100% genuine Siemens industrial products with competitive pricing, expert technical support, GST invoices, bulk order assistance, secure packaging, and fast delivery across Faridabad, Delhi NCR, and throughout India.