Siemens SIRIUS 3RT1066-6AV36 Power Contactor 300A, 160kW, 400V, AC/DC 380-420V Coil, Busbar Connection Original Brand New

Overview

The Siemens SIRIUS 3RT1066-6AV36 Power Contactor is a high-performance, 3-pole switching device designed for use in demanding motor and load control applications. Part of the reliable SIRIUS series, this contactor is rated for AC-3e/AC-3 service at 300 A and 160 kW at 400 V. It features a highly versatile conventional drive with a wide-range 380-420 V AC (50-60 Hz) / DC control voltage (Uc), minimizing inventory needs. Engineered for simple integration into industrial panels, its main circuit uses robust busbar connections, while the control and auxiliary circuits utilize secure screw terminals.

Key Benefit

• Reduced Inventory: The wide-range 380-420V AC/DC coil allows for use in diverse control voltage environments.
• High Power Density: Compact design handles significant power switching (300A, 160 kW) for motor loads up to 400 V.
• Reliable Performance: Rated for both AC-3 and the modern, efficiency-optimized AC-3e category.
• Flexible Wiring: Includes 2 NO + 2 NC auxiliary contacts for versatile signaling and interlocking circuits.
• Simplified Installation: Main power connections via busbar facilitate fast, reliable connections in power distribution systems.

Function

The 3RT1066-6AV36 acts as an electrically-operated switch for the main current circuit, making or breaking the connection to the motor or load.

• Main Circuit Control: The 3-pole main contacts handle the $300\text{ A}$ current to reliably switch the three-phase motor or electrical load.
• Control Circuit: The coil receives the $380\text{–}420\text{ V}$ AC/DC control signal, generating the magnetic force to close and open the main contacts.
• Signaling and Interlock: The integrated $2\text{ NO}+2\text{ NC}$ auxiliary contacts provide real-time feedback on the contactor’s status to the PLC or control system, enabling safety interlocks and status indication.

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