Siemens 3MT8140-1AQ04 Contactor AC-3, 140A/75kW, 400V, 2NO2NC, 380 VAC, 50 Hz, 3-pole, size S6 Original Brand New

Overview

The Siemens 3MT8140-1AQ04 is a robust and reliable AC-3 contactor designed for demanding industrial applications. As a crucial component in electrical control systems, this high-performance contactor facilitates the efficient switching of electrical loads, ensuring smooth and safe operation of machinery. Engineered to Siemens’ renowned standards of quality and durability, the 3MT8140-1AQ04 offers exceptional longevity and consistent performance, minimizing downtime and maintenance costs in critical environments. Its compact yet powerful design makes it suitable for integration into various control panels and systems where space optimization is a consideration.

Function

At its core, the Siemens 3MT8140-1AQ04 contactor serves to control the flow of electrical current to a load, such as motors, heating elements, or lighting systems. Specifically rated for AC-3 duty, it is optimized for switching squirrel-cage motors during operation, including starting, stopping, and reversing. This contactor features a 3-pole configuration, allowing it to handle three-phase power supplies commonly found in industrial settings. When the 380 VAC, 50 Hz control voltage is applied to its coil, the electromagnet engages, closing the main contacts and enabling the power to flow to the connected equipment. The integrated 2 NO (Normally Open) and 2 NC (Normally Closed) auxiliary contacts provide additional flexibility for control circuits, enabling interlocking, signaling, and sequence control within complex automation systems. The reliable screw terminals ensure secure and stable electrical connections.

Key Features & Benefit

• High Performance AC-3 Duty: Specifically designed for switching inductive loads, particularly squirrel-cage motors up to 75kW at 400V.
• Robust Current Rating: Capable of handling up to 140A, making it suitable for high-power applications.
• Optimal Voltage Compatibility: Operates efficiently at 400V, with a control voltage of 380 VAC, 50 Hz.
• 3-Pole Configuration: Ideal for controlling three-phase electrical systems.
• Versatile Auxiliary Contacts: Features 2 Normally Open and 2 Normally Closed contacts for enhanced control circuit flexibility and safety interlocks.
• Size S6 Frame: A compact yet powerful design, ensuring efficient use of panel space while accommodating substantial power requirements.
• Reliable Screw Terminals: Provides secure and straightforward wiring, ensuring stable electrical connections and reducing installation time.
• Durable Siemens Quality: Manufactured to stringent Siemens standards, guaranteeing long-term reliability and minimal maintenance.
• Enhanced Operational Safety: Designed to provide dependable switching, contributing to the overall safety and protection of electrical systems.
• Wide Application Range: Perfect for motor control, HVAC systems, pumping stations, conveyor belts, and general industrial machinery where robust contactors are essential.

Application

The Siemens 3MT8140-1AQ04 contactor is an indispensable component in a wide array of industrial and commercial applications. Its primary use includes the direct control of electric motors in manufacturing plants, water treatment facilities, and building automation systems. It’s also well-suited for controlling heating, ventilation, and air conditioning (HVAC) units, lighting circuits in large complexes, and power factor correction equipment. From heavy machinery in factories to critical infrastructure, this contactor provides the reliable switching capability needed to ensure efficient and safe operation of high-power electrical loads.