Siemens 3RT2045-3KB40 SIRIUS Power Contactor, 80 A, 37 kW, 24 V DC, Spring-Loaded/Screw Terminals, S3 Frame Original Brand New

Overview

The Siemens 3RT2045-3KB40 is a high-performance SIRIUS 3RT2 series power contactor designed for reliable and efficient switching of motors and electrical loads. With a robust design and a frame size of S3, this contactor is engineered to handle demanding industrial applications. It features a rated current of 80 A for AC-3e/AC-3 operation, a power rating of 37 kW at 400 V, and a 3-pole configuration. The integrated varistor in the 24 V DC control circuit provides excellent surge protection, making it particularly suitable for use with sensitive PLC outputs. The versatile terminal configuration, with screw terminals for the main circuit and spring-loaded terminals for the control and auxiliary circuits, ensures fast and secure wiring.

Key Benefit

• High Performance & Reliability: Rated for 80 A and 37 kW, ensuring dependable operation for a wide range of motor applications.
• Enhanced Protection: The integrated varistor protects the control circuit from voltage spikes, extending the lifespan of the contactor and connected devices, especially sensitive PLC outputs.
• Versatile Connectivity: Combines screw terminals for the main circuit with spring-loaded terminals for control and auxiliary circuits, offering flexibility and efficient, vibration-proof connections.
• Space-Saving Design: Its compact S3 frame size minimizes panel space requirements without compromising on power capacity.
• Easy Integration: The 24 V DC control voltage and suitability for PLC outputs make it ideal for modern automation systems.
• Integrated Auxiliary Contacts: Comes standard with 1 normally open (NO) and 1 normally closed (NC) auxiliary contacts, simplifying feedback and control circuit design.

Function

• Motor Switching: Efficiently switches three-phase motors up to 37 kW.
• Load Control: Suitable for general load switching applications.
• PLC Interface: Designed to be driven directly by PLC outputs due to its low power consumption and integrated surge suppression.
• Safety Interlocking: The built-in auxiliary contacts can be used for interlocking, status feedback, or creating control loops.

Technical Specification

• Product Type: Power Contactor
• Series: SIRIUS 3RT2
• Model Number: 3RT2045-3KB40
• Rated Current (AC-3e/AC-3): 80 A
• Rated Power (AC-3e/AC-3): 37 kW at 400 V
• Poles: 3-pole
• Control Voltage: 24 V DC (operating range 0.8 to 1.2 * Uc)
• Integrated Protection: Varistor
• Auxiliary Contacts: 1 NO + 1 NC
• Main Circuit Terminals: Screw Terminals
• Control/Auxiliary Circuit Terminals: Spring-Loaded Terminals
• Frame Size: S3
• Special Features: Suitable for PLC outputs

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