Product Description

Siemens SIRIUS Power Contactor 65A, 30kW, 400V, 3-Pole, 24V DC, Size S2 – 3RT2037-1KB40

Product Description

The Siemens 3RT2037-1KB40 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. Featuring a 65A AC-3e/AC-3 rating and suitable for motors up to 30 kW at 400V, this contactor provides dependable performance for demanding industrial motor-control applications. Its 24V DC control voltage, operating range of 0.8–1.2 × Uc, and integrated varistor provide reliable coil operation and effective surge suppression. The contactor includes 1 NO + 1 NC auxiliary contacts for control, feedback, signaling, and electrical interlocking functions.

The Siemens 3RT2037-1KB40 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 S2 frame size, screw terminal connections, integrated varistor, and robust SIRIUS construction make it suitable for reliable installation in industrial 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: 3RT2037-1KB40

• Utilization Category: AC-3e/AC-3

• Rated Operational Current: 65A

• Motor Power: 30 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

• Contactor Size: S2

• Screw Terminal Connections

• Suitable for three-phase 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

• Factory Automation

Benefits

• Reliable 65A AC-3e/AC-3 motor switching

• Suitable for motors up to 30 kW at 400V

• Reliable 24V DC control operation

• Wide 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

• 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 3RT2037-1KB40 used for?

The Siemens 3RT2037-1KB40 is a SIRIUS power contactor designed for switching and controlling three-phase motors and industrial electrical loads. It is rated at 65A AC-3e/AC-3 and supports motors up to 30 kW at 400V.

Q2. What is the rated current of 3RT2037-1KB40?

The contactor has a rated operational current of 65A in AC-3e/AC-3 applications.

Q3. What motor power can it handle?

The 3RT2037-1KB40 is suitable for motors up to 30 kW at 400V.

Q4. What is the control voltage?

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

Q5. Does it have an integrated varistor?

Yes. The 3RT2037-1KB40 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 for electrical wiring.

Q8. What is the contactor size?

The 3RT2037-1KB40 belongs to Size S2.

Q9. 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.

Q10. Where can Siemens 3RT2037-1KB40 be used?

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

Q11. Why buy Siemens 3RT2037-1KB40 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.