Siemens Power contactor, 1NO+1NC, 24VDC, 4 kW

Product Overview

Power contactor, AC-3e/AC-3, 9 A, 4 kW / 400 V, 3-pole, 24 V DC, 0.7-1.25 Uc, with plugged-in varistor, auxiliary contacts: 1 NO + 1 NC, spring-loaded terminal, frame size: S0, suitable for PLC outputs, no auxiliary switch can be added*

This robust power contactor (Article Number: 3RT2023-2KB40) is designed for reliable switching of three-phase motors and electrical loads in demanding industrial applications with direct PLC integration. The device features a 3-pole configuration with AC-3e/AC-3 rating of 9 A at 4 kW / 400 V, making it suitable for small to medium-power motor control applications. With 24 V DC coil voltage, wide voltage range operation, plugged-in varistor, and spring-loaded terminals, this contactor provides dependable switching performance optimized for direct connection to PLC outputs.

Key Features

• 3-pole power contactor for three-phase motor control
• AC-3e/AC-3 rating: 9 A, 4 kW / 400 V for reliable small to medium-power motor switching
• 24 V DC coil voltage with wide voltage range (0.7-1.25* Uc)
• Plugged-in varistor for integrated surge protection
• Frame size S0 for robust industrial applications
• Spring-loaded terminal connections for quick and secure wiring without screws
• Auxiliary contacts: 1 NO + 1 NC for versatile control and feedback functions
• PLC output compatibility for direct connection to programmable logic controllers
• Robust design suitable for demanding industrial environments
• High switching reliability for critical applications
• SIRIUS 3RT2 series representing the latest contactor technology

Technical Specifications

• Net Weight: 0.635 kg
• Packaging Dimensions: 54.00 x 108.50 x 115.50 mm
• Packaging Quantity: 1 piece
• Quantity Unit: 1 Piece
• Country of Origin: Germany
• Rated Current: 9 A (AC-3e/AC-3)
• Power Rating: 4 kW / 400 V
• Coil Voltage: 24 V DC (0.7-1.25* Uc)
• Pole Configuration: 3-pole
• Auxiliary Contacts: 1 NO + 1 NC
• Frame Size: S0
• Terminal Type: Spring-loaded terminals
• Special Features: Plugged-in varistor, PLC output compatible
• Auxiliary Switch: Cannot be added
• EAN: 4011209900608
• UPC: 040892958591

Applications

• PLC-controlled motor applications up to 4 kW in industrial automation
• Pump control systems with direct PLC interface and surge protection
• Fan motor switching in automated HVAC systems
• Conveyor motor control in automated material handling
• Machine tool applications requiring PLC integration with surge protection
• Process control systems with small to medium-power motor-driven equipment
• Manufacturing equipment with automated three-phase motor control
• Automation systems requiring direct PLC output connection
• Building automation systems with PLC-controlled motor drives
• Industrial machinery requiring reliable PLC-compatible motor control
• Robotics applications with motor control requirements
• Quick installation applications benefiting from spring-loaded terminals

Installation Benefits

• Frame size S0 for robust applications
• Spring-loaded terminal connections for quick and secure wiring without screws
• Reliable operation in demanding industrial environments
• Easy installation with standard mounting methods
• Professional appearance maintaining system aesthetics
• Direct PLC connection with integrated surge protection
• Versatile auxiliary contacts for comprehensive control integration
• Wide voltage range for flexible system integration
• Tool-free wiring with spring-loaded terminal technology

Power Contactor Advantages

• Enhanced motor protection through reliable switching operation
• Optimal switching capacity for AC-3e/AC-3 motor loads up to 4 kW
• Long operational life with robust contact design
• Electrical isolation between control and power circuits
• Overload handling suitable for motor starting applications
• Robust S0 design for demanding industrial applications
• Proven reliability in small to medium-power motor control
• Versatile auxiliary contacts for comprehensive control circuit integration
• Built-in surge protection with plugged-in varistor
• PLC optimization for direct programmable logic controller interface
• Quick installation with spring-loaded terminal technology

Compatibility

• 24 V DC PLC outputs for direct connection to programmable logic controllers
• Three-phase motor applications up to 4 kW
• Industrial control panels with Frame S0 mounting
• Motor control centers requiring PLC-compatible contactors
• Automated process control systems with PLC integration
• Standard DIN rail and panel mounting systems
• SIRIUS 3RT2 contactor family for system integration
• Building automation systems with PLC-controlled motor drives
• Industrial automation systems requiring wide voltage range operation
• Quick installation applications requiring tool-free wiring

Product Classifications

• eClass: 27-37-10-03
• ETIM: EC000066
• UNSPSC: 39-12-15-29

Compliance & Certifications

• Export Control: AL: N / ECCN: N
• RoHS Compliance: Since 01.10.2009

REACH Compliance This product complies with REACH regulation requirements. Information obligation imposed by Article 33, REACH Regulation: This product includes one or several articles in which Lead is contained in concentrations higher than 0.1% weight by weight (w/w). Based on the information currently available, we assume that these substances do not pose any risk if the articles are used as intended (including disposal). Please also refer to product documentation.

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For technical documentation and CAD files, please visit:

• Official Product Datasheet (PDF)
• Siemens Industry Mall Product Page
• Siemens PARTcommunity for 3D CAD Models
• Siemens Technical Support Center for technical documentation requests