Siemens 3RT1075-6AF36 SIRIUS Power Contactor, S12, 400A AC-3, 200kW, 110-127V AC/DC Coil Original Brand New

Overview

The Siemens 3RT1075-6AF36 is a robust and high-performance SIRIUS series power contactor (Size S12) designed for reliable switching of high-power motors and other heavy-duty industrial loads. Engineered for demanding applications, this 3-pole contactor is rated for 400 A (AC-3e/AC-3) and supports motor power up to 200 kW at 400 V.

It features a versatile conventional drive control coil (Uc) that operates on a wide voltage range of 110-127 V AC (50-60 Hz) / DC, simplifying inventory and maintenance. With integrated auxiliary contacts 2 NO + 2 NC, it offers immediate signaling capabilities. The main circuit uses busbar connections for high current integrity, while the control and auxiliary circuits utilize reliable screw terminals.

Benefit

• Exceptional Reliability: SIRIUS quality ensures a long mechanical and electrical service life, reducing downtime.
• High-Power Capacity: Specifically built to manage large loads up to 400A and 200kW, making it ideal for heavy machinery.
• Simplified Stocking: The wide range (UC) control voltage coil supports both AC and DC control systems with a single unit.
• Modular System Integration: Easily combinable with other SIRIUS components (like overload relays, timers) to build complete, efficient load feeders.
• Immediate Feedback: Integrated auxiliary contacts (2NO + 2NC) eliminate the need for external add-ons in many applications.

Function & Application

The 3RT1075-6AF36 Power Contactor is primarily used for:

1. Switching Three-Phase Motors: Controlling the start, stop, and direction of powerful motors in systems like pumps, compressors, fans, and conveyor belts.
2. Motor Starter Systems: Acting as the main switching element in Direct-On-Line (DOL) and reversing starter combinations.
3. Switching Resistive Loads (AC-1): Capable of switching resistive loads up to 430A (AC-1 rating).

This Siemens contactor is essential for plant construction, mechanical engineering, and industrial automation wherever high-current, reliable switching is required.

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