Siemens SIRIUS 3RT1075-2AS36 Power Contactor 400A, 200kW, 500-550V AC/DC Coil, Spring-Loaded Terminal, Size S12 Original Brand New

Overview

The Siemens SIRIUS 3RT1075-2AS36 Power Contactor is a high-performance, 3-pole switching device engineered for controlling motors and heavy-duty electrical loads up to $200\text{ kW}$ (at $400\text{ V}$). Part of the highly successful SIRIUS modular system, this size S12 contactor is designed for robust industrial environments, offering high contact reliability and a long mechanical life.

This specific model features a powerful coil that accepts a wide control voltage range of $500\text{-}550\text{ V}$ for both AC ($50\text{-}60\text{ Hz}$) and DC operation, ensuring operational flexibility. It comes with pre-installed $2\text{ NO}+2\text{ NC}$ auxiliary contacts and utilizes spring-loaded terminals for fast, reliable, and vibration-proof wiring in the control and auxiliary circuits. The main circuit employs secure busbar connections.

Key Specifications & Function

• Product ID: 3RT1075-2AS36 (Siemens SIRIUS 3RT1)
• Contactor Type: Power Contactor for switching motors and non-inductive loads.
• Operating Current (AC-3e/AC-3): $400\text{ A}$ (at $400\text{ V}$)
• Power Rating: $200\text{ kW}$ (at $400\text{ V}$)
• Poles: 3-pole
• Control/Coil Voltage (Uc​): $500\text{-}550\text{ V}$ AC ($50\text{-}60\text{ Hz}$) / DC (Conventional Drive)
• Auxiliary Contacts: $2\text{ Normally Open (NO)}+2\text{ Normally Closed (NC)}$ (Integrated)
• Main Circuit Connection: Busbar connection
• Control/Auxiliary Circuit Connection: Spring-loaded terminal (fast and vibration-proof)
• Size: S12

Benefits & Features

• High Performance: Capable of handling significant loads up to $400\text{ A}$ and $200\text{ kW}$, making it ideal for heavy-duty motor control.
• Reliable SIRIUS Quality: Built with a compact design and high contact reliability, ensuring long-term, trouble-free operation in challenging conditions.
• Universal AC/DC Control: The conventional drive with a $500\text{-}550\text{ V}$ wide-range coil simplifies selection and maintenance for systems using high AC or DC control voltages.
• Time-Saving Wiring: Spring-loaded terminals on the control and auxiliary circuits allow for quick, maintenance-free, and secure connection, reducing installation time and eliminating the need for periodic re-tightening.
• Integrated Flexibility: Pre-installed $2\text{ NO}+2\text{ NC}$ auxiliary contacts minimize the need for external add-ons, simplifying design and inventory.
• Global Standard: Climate-resistant and approved for worldwide use (e.g., IEC, UL/CSA), ensuring compliance and versatility.
• IE3/IE4 Ready: Optimized for use with modern, energy-efficient IE3 and IE4 motors.

Application

The Siemens 3RT1075-2AS36 is primarily used for switching and controlling:

• Three-phase AC motors (direct-on-line starting)
• Compressors, pumps, and ventilation systems
• Heating, lighting, and general industrial loads

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