Siemens SIRIUS 3RT1075-6AV36 Power Contactor 400A, 200kW, 3-Pole, 380-420V AC/DC Coil, Size S12 Original Brand New

Overview

The Siemens SIRIUS 3RT1075-6AV36 Power Contactor is a high-performance, 3-pole device from the modular SIRIUS system, designed for reliably switching motors and other loads in industrial applications. As a robust Size S12 contactor, it is engineered for demanding tasks, offering an operational current of 400 A for AC-3/AC-3e duty (motor switching up to 200 kW at 400 V). Its versatile control circuit accepts a wide voltage range of 380-420 V AC (50-60 Hz) / DC for flexible installation.

Key Features and Technical Specification

• Product Number: 3RT1075-6AV36
• Product Brand: Siemens SIRIUS
• Contactor Size: S12
• Poles: 3-pole
• Rated Operational Current (Ie​) (AC-3e/AC-3, 400 V): 400 A
• Rated Operational Power ($\text{P}$) (AC-3e/AC-3, 400 V): 200 kW
• Control Voltage (Uc​): 380-420 V AC (50-60 Hz) / DC (Conventional Drive)
• Auxiliary Contacts: Integrated $2\text{ NO}+2\text{ NC}$ (Normally Open + Normally Closed)
• Main Circuit Connection: Busbar connection
• Control/Auxiliary Circuit Connection: Screw terminals

Benefit

• High Performance: Capable of handling significant motor loads up to 400A and 200kW, ensuring reliable operation for heavy-duty industrial machinery.
• Versatile Control: The wide-range AC/DC coil (380-420 V) simplifies ordering and stocking, and allows for use in various international or mixed-voltage control systems.
• Space & Cost Efficiency: As part of the SIRIUS modular system, it offers a compact design relative to its performance class, facilitating high packing density in control cabinets.
• Integrated Auxiliary Contacts: The pre-installed $2\text{ NO}+2\text{ NC}$ auxiliary contacts reduce complexity and wiring time for signaling and interlocking circuits.
• Robust Connection: The main circuit’s busbar connection is ideal for high-current applications, ensuring secure and low-resistance power transmission.
• Global Readiness: Approved for worldwide use (e.g., IEC, UL/CSA) and compliant with modern standards like AC-3e, making it IE3/IE4-ready for switching highly-efficient motors.

Function and Application

The SIRIUS 3RT1075-6AV36 acts as an electromechanical switch for power circuits. It is primarily used for Direct-On-Line (DOL) switching of 3-phase asynchronous motors (Utilization Category AC-3e/AC-3) and for switching highly inductive or resistive loads (e.g., heating, lighting systems) in Utilization Category AC-1.

Typical Applications Include:

• Motor control for pumps, fans, compressors, and conveyors in heavy industry.
• Integrating into larger control systems, Motor Control Centers (MCCs), and plant automation.

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