Siemens 3MT8120-1AF07 Contactor AC-3, 120A/55kW, 400V, 4NO4NC, 110 VAC, 50 Hz, 3-pole, size S6 Original Brand New

Overview

The Siemens 3MT8120-1AF07 Contactor is a robust and highly reliable industrial-grade AC-3 switching device, designed for demanding motor control applications. This powerful 120A Contactor operates efficiently at 400V (rated 55kW) and is engineered for precise control of three-phase AC motors. As a key component in electrical panels and automation systems, the Siemens 3MT8120-1AF07 ensures safe and efficient power switching, making it an essential asset for various industrial environments. Its compact yet durable size S6 design with convenient screw terminals simplifies installation and maintenance.

Key Features & Benefit

• High Current Rating: With an AC-3 rating of 120A (55kW at 400V), this contactor is perfectly suited for heavy-duty motor switching, ensuring stable and consistent performance under significant loads.
• Versatile Contact Configuration: Equipped with 4 Normally Open (4NO) and 4 Normally Closed (4NC) auxiliary contacts, the Siemens 3MT8120-1AF07 offers exceptional flexibility for complex control circuits and signaling.
• Efficient Coil Voltage: The 110 VAC, 50 Hz coil ensures reliable and consistent operation, compatible with common industrial control power supplies.
• Three-Pole Design: Ideal for controlling three-phase AC motors, providing a secure and effective switching solution.
• Robust Size S6: The size S6 contactor provides a balance of compact design and high current carrying capacity, making it suitable for integration into various control cabinets.
• Secure Screw Terminals: Features reliable screw terminals for easy and secure wiring connections, reducing installation time and ensuring long-term operational stability.
• Genuine Siemens Quality: As part of the Siemens product line, the 3MT8120-1AF07 guarantees superior quality, adherence to international standards, and exceptional longevity, minimizing downtime and maintenance cost.

Function

The primary function of the Siemens 3MT8120-1AF07 Contactor is to safely and efficiently switch high-current electrical circuits, particularly for AC motor control. It acts as an electrically controlled switch, allowing a low-power control signal (110 VAC coil) to activate or de-activate a high-power circuit (120A, 400V).

• Motor Starting & Stopping: Controls the on/off operation of industrial AC motor.
• Power Switching: Used for switching other resistive or inductive loads in industrial application.
• Interlocking: The 4NO+4NC auxiliary contacts enable complex control logic, such as interlocking with other devices or providing feedback to control system.
• Remote Control: Facilitates remote control of high-power equipment, enhancing operational safety and convenience.

Application

The Siemens 3MT8120-1AF07 Contactor is an ideal choice for a wide range of industrial application, including:

• Pump control system
• Conveyor belt system
• HVAC system
• Industrial fan control
• Machine tool control
• Compressor control
• General motor control in factories and plant

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