Siemens 3MT8120-1AH04 Contactor AC-3 120A/55kW 400V 2NO2NC, 48 VAC, 50 Hz 3-pole, Size S6 Original Brand New

Overview

The Siemens 3MT8120-1AH04 is a robust and high-performance AC-3 contactor designed for reliable switching of inductive loads in industrial applications. Part of Siemens’ trusted SIRIUS modular system, this 3-pole power contactor is engineered for exceptional durability and efficiency, making it an ideal choice for controlling motors, heaters, and other demanding electrical equipment. With a powerful 120A current rating and a 55kW power rating at 400V, it offers a dependable solution for medium to large-scale power control needs. Its compact Size S6 design and convenient screw terminals simplify installation and maintenance within control panels.

Function

The Siemens 3MT8120-1AH04 contactor serves as an electrically operated switch, primarily used for remotely controlling high-power electrical circuits. When its 48 VAC, 50 Hz coil is energized, the contactor closes, allowing electrical current to flow through its main contacts to the connected load. Conversely, when the coil is de-energized, the contacts open, interrupting the circuit. The integrated 2 NO (Normally Open) and 2 NC (Normally Closed) auxiliary contacts provide flexible signaling and interlocking options for complex control circuits, enhancing safety and automation capabilities.

Key Features

• High Power Rating: Rated for AC-3 120A and 55kW at 400V, suitable for heavy-duty motor control and resistive loads.
• 3-Pole Design: Ideal for switching three-phase AC power circuits.
• Coil Voltage: Operates with a 48 VAC, 50 Hz control voltage, common in many industrial setups.
• Auxiliary Contacts: Equipped with 2 NO + 2 NC auxiliary contacts for versatile control, feedback, and interlocking functions.
• Robust Construction (Size S6): Engineered for demanding industrial environments, ensuring long-term reliability and performance.
• Screw Terminals: Provides secure and straightforward wiring connections, facilitating easy installation and maintenance.
• Siemens SIRIUS Family: Integrates seamlessly with other Siemens SIRIUS control gear components, offering a comprehensive and scalable automation solution.
• AC-3 Utilization Category: Optimized for switching squirrel-cage motors during operation, including frequent starting and stopping.

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