Siemens 3MT8040-1AF00 Contactor AC-3, 40A/18.5kW, 400V, 110 VAC, 50 Hz, 3-pole, size S2 Original Brand New

Overview

The Siemens SIRIUS 3MT8040-1AF00 is a robust and reliable 3-pole power contactor designed for controlling AC motors and resistive loads up to 18.5 kW at 400V. As part of the globally recognized SIRIUS family, this contactor embodies Siemens’ commitment to high quality, performance, and industrial safety. Its compact Size S2 design and convenient screw terminals make it suitable for a wide range of industrial applications, offering ease of installation and maintenance. Ideal for demanding environments, it ensures efficient and safe operation of machinery.

Function

The Siemens 3MT8040-1AF00 contactor primarily functions as an electrically operated switch for a power circuit. When its 110V AC, 50 Hz control coil is energized, it closes the main power contacts, allowing current to flow to the connected load (e.g., an electric motor). Conversely, when the coil is de-energized, the contacts open, interrupting the power supply. This makes it crucial for starting, stopping, and reversing motors, as well as switching other electrical loads in automated systems and control panels. Its AC-3 rating signifies its suitability for squirrel-cage motors: starting, switching off motors during running.

Key Features

• High Performance: Rated for AC-3 applications up to 40A / 18.5kW at 400V, ensuring reliable switching of demanding loads.
• Versatile Coil Voltage: Features a 110 VAC, 50 Hz control coil, compatible with common industrial control circuits.
• 3-Pole Configuration: Ideal for controlling three-phase AC motors and other three-phase loads.
• Compact Size S2: Optimized dimensions for space-saving installation in control cabinets and enclosures.
• Robust Screw Terminals: Provides secure and straightforward wiring connections, enhancing installation efficiency and reliability.
• Durable Construction: Built with high-quality materials to withstand harsh industrial environments and ensure a long operational lifespan.
• Siemens SIRIUS Family: Part of a comprehensive and well-established product line, ensuring compatibility and easy integration with other Siemens control gear.
• Safety & Reliability: Engineered to meet international industrial standards for safe and dependable operation.

Application

• Motor control (start/stop/reverse) for pumps, fans, conveyors, compressors, and machine tool.
• Switching resistive loads (e.g., heating elements, lighting system).
• Integration into control panels, motor control centers (MCCs), and industrial automation system.
• Building automation and HVAC system.