Product Description

Siemens SIRIUS Power Contactor 32A, 15kW, 400V, 3-Pole, 24V DC, Size S0 – 3RT2027-1KB40

Product Description

The Siemens 3RT2027-1KB40 is a reliable Power Contactor from the SIRIUS 3RT2 series, designed for switching and controlling three-phase motors and industrial electrical loads. It features an AC-3e/AC-3 rating of 32A and is suitable for motors up to 15 kW at 400V. The contactor operates with a 24V DC control voltage over 0.7–1.25 × Uc and includes a plugged-in varistor for coil surge suppression. It provides 1 NO + 1 NC auxiliary contacts, uses screw terminal connections, and has a compact S0 frame size. It is also suitable for PLC outputs.

The Siemens 3RT2027-1KB40 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 24V DC coil and PLC-compatible design make it suitable for modern industrial automation and motor-control applications.

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: 3RT2027-1KB40

• Utilization Category: AC-3e/AC-3

• Rated Operational Current: 32A

• Motor Power: 15 kW at 400V

• 3-Pole Configuration

• Control Voltage: 24V DC

• Control Voltage Range: 0.7–1.25 × Uc

• Integrated/Plugged-in Varistor

• Auxiliary Contacts: 1 NO + 1 NC

• Screw Terminal Connections

• Contactor Size: S0

• Suitable for PLC Outputs

• Rated Insulation Voltage: 690V

• Suitable for three-phase motor switching

• Designed for industrial automation and motor-control applications

• Auxiliary switch cannot be added to this configuration

Applications

• Motor Control Centers (MCC)

• Industrial Automation Panels

• DOL Motor Starters

• Three-Phase Motor Control

• PLC-Controlled Motor Systems

• Pump Control Panels

• Compressors

• Conveyor Systems

• HVAC Systems

• Manufacturing Machinery

• OEM Electrical Panels

• Machine Control Panels

• Factory Automation

Benefits

• Reliable 32A AC-3e/AC-3 motor switching

• Suitable for motors up to 15 kW at 400V

• 24V DC control for automation systems

• Wide 0.7–1.25 × Uc control voltage tolerance

• Plugged-in varistor provides effective coil surge suppression

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

• Suitable for direct connection to compatible PLC outputs

• Compact and durable S0 design

• Secure screw-terminal connections

• Easy integration into industrial motor-control systems

• Suitable for DOL starter applications

• Reliable Siemens SIRIUS performance

Frequently Asked Questions (FAQs)

Q1. What is Siemens 3RT2027-1KB40 used for?

The Siemens 3RT2027-1KB40 is a SIRIUS power contactor designed for switching and controlling three-phase motors and industrial electrical loads. It is rated at 32A AC-3e/AC-3 and supports motors up to 15 kW at 400V.

Q2. What is the rated current of 3RT2027-1KB40?

The contactor has a rated operational current of 32A in AC-3e/AC-3 applications.

Q3. What motor power can it handle?

The 3RT2027-1KB40 is suitable for motors up to 15 kW at 400V.

Q4. What is the control voltage?

The contactor operates with a 24V DC control voltage and supports a control voltage range of 0.7–1.25 × Uc.

Q5. Does it have a varistor?

Yes. The 3RT2027-1KB40 features a plugged-in 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. Is it suitable for PLC outputs?

Yes. Siemens specifically identifies the 3RT2027-1KB40 as suitable for PLC outputs, making it appropriate for PLC-controlled motor applications.

Q8. What type of terminals does it use?

The contactor uses screw terminal connections for electrical wiring.

Q9. What is the contactor size?

The 3RT2027-1KB40 belongs to Size S0.

Q10. Why buy Siemens 3RT2027-1KB40 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.