Siemens 3MT8120-1AQ04 AC-3 Contactor 120A, 55kW, 400V, 3-Pole, Size S6 Original Brand New

Siemens 3MT8120-1AQ04 AC-3 Contactor | High-Performance Industrial Motor Control

Overview

The Siemens 3MT8120-1AQ04 is a robust and highly efficient AC-3 Contactor designed for demanding industrial applications, particularly for controlling AC motors. This 3-pole contactor, part of Siemens’ renowned S6 size range, offers exceptional performance with a rated operational current of 120A and a power rating of 55kW at 400V. Engineered for reliability and durability, it features a 380 VAC, 50 Hz control voltage and convenient screw terminals for secure and straightforward wiring. With its integrated 2 NO (normally open) and 2 NC (normally closed) auxiliary contacts, the 3MT8120-1AQ04 provides versatile control options, making it an ideal choice for a wide array of motor control circuits and industrial automation system.

Key Benefit

• Reliable Motor Control: Specifically designed for AC-3 applications, ensuring efficient and safe switching of squirrel-cage motors.
• High Current & Power Capacity: Handles significant loads with a 120A operational current and 55kW at 400V, suitable for powerful industrial machinery.
• Enhanced Safety & Control: Features 2 normally open and 2 normally closed auxiliary contacts for flexible integration into safety and control circuits.
• Durable & Robust Construction: Built to Siemens’ high-quality standards, guaranteeing a long service life and reliable operation in harsh industrial environments.
• Easy Installation: Equipped with user-friendly screw terminals for quick and secure electrical connections, reducing installation time and effort.
• Space-Efficient Design (Size S6): Optimizes panel space while delivering high performance, crucial for compact industrial setups.
• Globally Recognized Brand: Trust in Siemens’ reputation for cutting-edge technology and dependable industrial component.

Function

The Siemens 3MT8120-1AQ04 AC-3 Contactor primarily functions as an electrically operated switch for a power circuit. Its core function include:

• Starting and Stopping Motors: Provides a reliable method for the frequent switching of AC motors, particularly those starting under load (AC-3 duty).
• Remote Control: Allows for the remote control of high-power circuits using a low-power control signal (380 VAC, 50 Hz coil).
• Circuit Interruption: Can safely interrupt the power supply to a motor or other inductive loads under normal operating conditions.
• Auxiliary Contact Integration: The 2 NO + 2 NC auxiliary contacts enable interlocking, signaling, and control circuit feedback within complex automation systems.
• Overload Protection Integration: Designed to work seamlessly with thermal overload relays or electronic overload relays for comprehensive motor protection.

Application

The Siemens 3MT8120-1AQ04 Contactor is an essential component for various industrial application requiring robust motor control, including:

• Pump and Compressor
• Ventilation and Air Conditioning System
• Conveyor System
• Machine Tool
• Material Handling Equipment
• HVAC System
• Industrial Fan
• General Industrial Motor Control Panel

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