Siemens 3RT2045-3NB34-3MA0 SIRIUS Power Contactor, S3, 80A, 37kW, 20-33V AC/DC, 2NO+2NC, Screw/Spring Terminals Original Brand New

Overview

The Siemens 3RT2045-3NB34-3MA0 is a high-performance SIRIUS power contactor engineered for reliable and efficient switching of electric motors and other industrial loads. As part of the Siemens SIRIUS 3RT2 series, this size S3 contactor is a crucial component in industrial automation and control panels.

It is designed for demanding applications, offering a robust solution for switching currents up to 80 A and handling motor loads up to 37 kW at 400 V. Its compact design and versatile connection options make it a top choice for system integrators and electrical engineers seeking reliability and ease of installation.

Key Benefit

• Exceptional Durability: Built to withstand the rigors of industrial environments, ensuring a long operational life and minimizing downtime.
• High Performance: Optimized for AC-3e/AC-3 applications, providing reliable switching for motors and other inductive loads.
• Flexible Control: Features a wide-range 20-33 V AC/DC control voltage, allowing for universal application in various control systems.
• Enhanced Protection: Integrated varistor protects the coil from voltage spikes, extending the life of the contactor and connected components.
• Versatile Connections: Main circuit utilizes secure screw terminals, while the control and auxiliary circuits feature convenient and fast spring-loaded terminals, simplifying wiring and maintenance.
• Comprehensive Auxiliary Contacts: Includes 2 NO (normally open) and 2 NC (normally closed) captive auxiliary switches for flexible signal and interlocking functions.
• Space-Saving Design: The compact S3 size helps to optimize panel space, allowing for higher component density in control cabinets.

Technical Specification

• Product Type: Power Contactor
• Product Series: Siemens SIRIUS 3RT2
• Product Number: 3RT2045-3NB34-3MA0
• Operating Current (AC-3e/AC-3): 80 A
• Rated Power (AC-3e/AC-3): 37 kW at 400 V
• Number of Poles: 3-pole
• Control Voltage: 20-33 V AC/DC
• Control Frequency: 50/60 Hz
• Integrated Protection: Varistor for surge suppression
• Auxiliary Contacts: 2 NO + 2 NC (captive auxiliary switch)
• Main Circuit Connection: Screw terminals
• Control & Auxiliary Circuit Connection: Spring-loaded terminals
• Size: S3
• Mounting: Standard DIN rail or screw mounting
• Application: Ideal for switching motors, resistive loads, and other industrial applications

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