Siemens 3RT2023-2KB40 Power Contactor, 9A, 4kW, 24V DC, S0 Frame, Spring-Loaded Terminal Original Brand New

Overview

The Siemens SIRIUS 3RT2023-2KB40 is a high-performance 3-pole power contactor engineered for reliable switching of motors and other industrial loads. This compact S0 frame device is part of the renowned SIRIUS modular system, offering seamless integration and space-saving design.

With its 24V DC control voltage and suitability for PLC outputs, it is the perfect choice for modern control systems requiring direct and secure signal connections. The innovative spring-loaded terminal technology ensures fast, vibration-proof, and maintenance-free wiring, significantly reducing installation time and costs.

Key Features & Benefit

• Optimized for Automation: Specifically designed for direct connection to PLC outputs, simplifying wiring and enhancing system integration.
• Space-Saving Design: The compact S0 frame size allows for high-density panel layouts, maximizing valuable cabinet space.
• Reliable Performance: Rated for AC-3e/AC-3 applications up to 9 A and 4 kW at 400 V, providing robust and dependable motor switching.
• Integrated Protection: Comes with a plugged-in varistor to protect the coil from voltage surges, extending the lifespan of both the contactor and the control circuit.
• Secure & Fast Wiring: Spring-loaded terminals offer a secure, gas-tight connection that is resistant to vibration and thermal cycling. This eliminates the need for regular screw tightening, reducing maintenance efforts.
• Clear Status Indication: Equipped with one normally open (1 NO) and one normally closed (1 NC) auxiliary contact, providing essential feedback on the contactor’s status to the control system.

Technical Specification

• Product Type: Power Contactor
• Product Number: 3RT2023-2KB40
• Series: SIRIUS 3RT2
• Number of Poles: 3-pole
• Operating Current (AC-3e/AC-3): 9 A
• Rated Power: 4 kW at 400 V
• Control Supply Voltage: 24 V DC
• Voltage Range: 0.7 to 1.25 * Uc (control voltage)
• Auxiliary Contacts: 1 NO + 1 NC
• Coil Protection: Integrated plugged-in varistor
• Terminal Type: Spring-loaded terminal
• Frame Size: S0
• Mounting: DIN rail
• Additional Features: No auxiliary switch block can be added.

Function & Application

The Siemens 3RT2023-2KB40 functions as a remote-controlled switch for high-current circuits. When the 24V DC control voltage is applied to the coil, it electromagnetically closes the main contacts, allowing power to flow to the connected load. The 1 NO and 1 NC auxiliary contacts simultaneously change state, signaling the status of the main contacts back to the PLC or control system.

This contactor is ideal for a wide range of industrial applications, including:

• Controlling AC motors (for pumps, fans, conveyors, and more)
• Switching resistive loads (heaters, lighting)
• Integrating into complex automation systems and machinery
• Building control panels and electrical cabinets where reliability and space efficiency are paramount.

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