Siemens SIRIUS 3RT1075-6LA06 Power Contactor, 400A, 200kW, Size S12, 3-Pole, Busbar Original Brand New

Overview

The Siemens 3RT1075-6LA06 is a high-performance, 3-pole power contactor from the SIRIUS 3RT1 series, engineered for reliable switching of high-power three-phase motors. Rated for $400\text{ A}$ (AC-3e/AC-3) and capable of handling up to $200\text{ kW}$ at $400\text{ V}$, this robust contactor is suitable for demanding industrial applications. As a core component of the modular SIRIUS system, the 3RT1075-6LA06 ensures high contact reliability and a compact design, making it an efficient solution for control panels and motor feeders.

Key Features

• Product Number: 3RT1075-6LA06
• Contactor Size: S12 (Large frame size)
• Rated Operational Current (Ie​): $400\text{ A}$ ($\text{AC-3e/AC-3}$ at $400\text{ V}$)
• Rated Operational Power: $200\text{ kW}$ at $400\text{ V}$
• Poles: 3-pole for three-phase systems
• Auxiliary Contacts: Pre-installed $2\text{ NO}+2\text{ NC}$ (Normally Open + Normally Closed)
• Main Circuit Connection: Busbar connections for high current stability
• Control/Auxiliary Circuit Connection: Secure screw terminals
• Operating Mechanism: Supplied without operating mechanism/coil (requires separate coil for operation)

Benefit

• High Performance: Excellent switching capacity for large motors up to $200\text{ kW}$.
• Integrated Design (SIRIUS System): Part of Siemens’ coordinated modular system, allowing for seamless integration and expansion with other SIRIUS devices (e.g., thermal overload relays, auxiliary switches).
• IE3/IE4 Ready: Designed for reliable switching of highly efficient IE3/IE4 motors, complying with modern energy efficiency standards.
• High Reliability: Proven contact reliability and mechanical life for long-term, trouble-free operation in industrial environments.
• Flexible Connection: Features busbar connections for the main circuit, ideal for high-current routing, and screw terminals for the control and auxiliary circuits.

Function & Application

The 3RT1075-6LA06 is primarily used as a power contactor for switching electric drives and motors in industrial automation and control systems. Its high current rating makes it ideal for heavy-duty applications such as:

• Starting and stopping large three-phase $\text{AC}$ motors (Direct-on-Line/DOL starting).
• Controlling large industrial loads and resistive loads ($\text{AC-1}$).
• Integration into motor control centers (MCCs) and automation control panels.

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