Siemens 3MT8120-1AF04 Contactor 120A/55kW, 400V, 110 VAC 50Hz, S6 Screw Terminal Original Brand New

Overview

The Siemens 3MT8120-1AF04 Contactor is a high-capacity, robust solution specifically engineered for heavy-duty industrial applications requiring reliable power control. Designed for AC-3 utilization, this formidable 120A/55kW, 400V contactor ensures precise and safe switching of large electric motors and other significant inductive loads. Featuring a powerful 110 VAC, 50 Hz coil and a substantial size S6, the Siemens 3MT8120-1AF04 is an indispensable component for critical industrial control circuits, offering exceptional performance and durability.

Key Features:

• High Current & Power Rating: Rated for a substantial 120A (AC-3) and capable of handling up to 55kW at 400V, making it perfectly suited for large-scale industrial motor control and high-power electrical circuit.
• Standard Industrial Coil Voltage: Equipped with a reliable 110 VAC, 50 Hz coil, commonly used in industrial control systems, ensuring broad compatibility and stable operation in 50Hz region.
• Dual Auxiliary Contacts: Features 2 normally open (2NO) and 2 normally closed (2NC) auxiliary contacts, providing extensive flexibility for complex interlocking, precise signaling, and advanced control schemes.
• Robust 3-Pole Design: Ensures secure and efficient switching of three-phase power, critical for the dependable operation of heavy industrial machinery.
• Large Frame Size S6: Optimized for robust performance and secure mounting in industrial control panels handling significant electrical loads, providing stability and durability.
• Secure Screw Terminals: Provides highly reliable, strong, and straightforward wiring connections, essential for high-current applications where secure contacts are paramount.
• Siemens Quality & Reliability: Manufactured by Siemens, guaranteeing a high standard of engineering, proven reliability, and extended operational life even in the most demanding industrial environment.

Function & Application

The primary function of the Siemens 3MT8120-1AF04 Contactor is to safely and effectively control extremely high-power electrical circuits. Its robust 3-pole configuration makes it an excellent choice for direct-on-line (DOL) starting and stopping of large three-phase induction motors, as well as managing other high-current resistive or inductive loads within complex industrial systems. The integrated 2NO2NC auxiliary contacts facilitate sophisticated control logic, enabling precise feedback to PLCs (Programmable Logic Controllers), intricate interlocking with other safety devices, or comprehensive operational status indication within advanced automation systems. This high power industrial contactor is an essential component in applications such as:

• Heavy industrial motor control center (MCCs)
• Large pumping and ventilation system
• Main power distribution in manufacturing plants
• Cranes, hoists, and heavy conveying system
• Industrial ovens and heating system
• Power factor correction system
• Large building automation and infrastructure project

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