Siemens 3RT2045-1AK64-3MA0 Power Contactor 80A, 37kW, 110V/120V AC, S3 Original Brand New

Overview: Siemens SIRIUS 3RT2045-1AK64-3MA0 Power Contactor (80 A, Size S3)

The Siemens 3RT2045-1AK64-3MA0 is a high-performance, 3-pole SIRIUS power contactor designed for industrial switching applications, primarily for controlling motors up to 37 kW (400 V) or carrying an 80 A rated current (AC-3e/AC-3).

As part of the SIRIUS 3RT2 series, this robust Size S3 contactor ensures reliable and safe operation in demanding environments. It features an efficient $\text{110 V AC (50 Hz) / 120 V AC (60 Hz)}$ control coil and includes permanently integrated $\text{2 NO + 2 NC}$ auxiliary contacts for seamless interlocking and control circuit integration.

Key Features

• Product Number: 3RT2045-1AK64-3MA0
• Contactor Size: S3 (Standard Industrial Size)
• Rated Current (AC-3e/AC-3): 80 A
• Rated Power (AC-3e/AC-3): 37 kW at 400 V
• Poles: 3-pole main circuit
• Control Voltage: $\text{110 V AC (50 Hz) / 120 V AC (60 Hz)}$
• Auxiliary Contacts: $\text{2 NO + 2 NC}$ (Captive/Permanently Mounted)
• Terminals: Secure screw terminals for main and auxiliary circuits.

Benefit & Advantages

• High Performance: Capable of safely switching high currents ($\text{80 A}$) and power ($\text{37 kW}$), ideal for heavy-duty motor control.
• Reliable Control: The captive $\text{2 NO + 2 NC}$ auxiliary switch block offers dependable status indication and control circuit functionality for interlocking and safety applications.
• Simplified Installation: Features robust screw terminals for straightforward, secure wiring of both power and control circuits.
• Global Standard: Conforms to $\text{AC-3e/AC-3}$ switching categories, ensuring compliance and versatility in various industrial systems.
• SIRIUS Quality: Siemens SIRIUS 3RT contactors are known for their long mechanical and electrical service life, minimizing downtime and maintenance costs.

Function/Application

The Siemens 3RT2045-1AK64-3MA0 is primarily used for the following functions in industrial automation and control:

1. Direct-On-Line (DOL) Starting: Switching three-phase $\text{AC}$ motors.
2. Industrial Switching: Controlling ohmic, inductive, and capacitive loads.
3. Circuit Isolation: Providing high-current circuit isolation and switching.
4. Integration: The $\text{2 NO + 2 NC}$ auxiliary contacts allow for integration into control circuits for feedback, interlocking (e.g., in reversing contactor assemblies), and signaling.

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