Siemens 3MT8140-1AQ24 Contactor AC-3, 140A/75kW,400V, 2NO2NC, 380 VAC, 50/60 Hz, 3-pole, size S6 Original Brand New

Overview: Siemens 3MT8140-1AQ24 High-Performance Industrial Contactor

The Siemens 3MT8140-1AQ24 is a robust and highly efficient AC-3 contactor, specifically engineered for the reliable switching of large motors and high-current inductive loads in diverse industrial applications. This durable 3-pole contactor, designated size S6, is a fundamental component for advanced motor control and power distribution systems. Designed for 400V main circuits, it expertly handles currents up to 140 Amperes and power ratings of 75kW, ensuring seamless and stable operation for significant machinery. With its resilient construction and precise engineering, the 3MT8140-1AQ24 is an excellent choice for new installations or critical system upgrades, offering long-term reliability in challenging environments.

Key Features & Specification

• Model: Siemens 3MT8140-1AQ24
• Contactor Type: AC-3 (optimized for making, breaking, and occasional starting of squirrel-cage motors)
• Rated Current: 140 Amperes (A)
• Rated Power: 75 Kilowatts (kW) at 400V
• Rated Operational Voltage (Main Circuit): 400 Volts (V) AC
• Auxiliary Contacts: 2 Normally Open (NO) + 2 Normally Closed (NC) for extensive control circuit flexibility, enabling complex interlocking and feedback solutions.
• Control Coil Voltage: 380 VAC (50/60 Hz) – a common industrial control voltage.
• Poles: 3-pole configuration for efficient control of three-phase motor applications.
• Size: S6 (A robust industrial size for medium to high-power applications)
• Terminals: Secure screw terminal connections for reliable and high-current wiring.
• Durability: Manufactured by Siemens, guaranteeing exceptional quality, extended service life, and high operational reliability in demanding conditions.

Function & Application

The Siemens 3MT8140-1AQ24 Contactor serves as a vital electromagnetic switch, enabling remote and automated control over high-power electrical circuits. Its primary function is to safely and efficiently establish or interrupt the flow of electrical current to large industrial motors, substantial resistive loads, and other heavy-duty equipment. The 380 VAC control coil allows for straightforward and efficient integration into automated control systems, enhancing both operational safety and overall system efficiency.

Common applications where this 140A 400V contactor excels include:

• Control of large motors in manufacturing plants, processing facilities, and heavy industries.
• Main power switching for substantial industrial machinery and equipment.
• High-capacity pumping stations and extensive conveyor systems.
• Power distribution within industrial facilities and commercial buildings.
• Integration into sophisticated automation lines requiring robust and reliable power switching.

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