Siemens 3MT8040-1AL24 Contactor AC-3, 40A/18.5kW, 400V, 2NO2NC, 230 VAC, 50/60 Hz, 3-pole, size S2 Original Brand New

Siemens 3MT8040-1AL24 Industrial Contactor

The Siemens 3MT8040-1AL24 is a high-performance, 3-pole AC-3 contactor from Siemens, engineered for the demanding requirements of industrial motor control and switching applications. This essential electrical component provides safe and efficient operation for motors up to 18.5 kW at 400V (AC-3 rated for 40 Amperes). Designed for reliability and longevity, it features a robust construction and user-friendly screw terminals for straightforward installation and maintenance. Whether you’re upgrading an existing system or implementing a new industrial setup, the Siemens 3MT8040-1AL24 offers the precise control and durability you expect from Siemens quality.

Key Features & Technical Specification

• Product Number: Siemens 3MT8040-1AL24
• Type: Contactor, AC-3 (Motor Switching)
• Poles: 3-pole
• Rated Current (AC-3): 40 Amperes
• Rated Power (AC-3): 18.5 kW at 400V
• Auxiliary Contacts: 2 Normally Open (2 NO) + 2 Normally Closed (2 NC)
• Control Voltage: 230 VAC (Volts AC), 50/60 Hz
• Size: S2 (Standard industrial size)
• Connection Type: Screw Terminals (Robust and reliable)
• Brand: Siemens
• Application: Ideal for controlling squirrel-cage motors, heating systems, lighting, and other resistive loads.
• Compliance: Designed to meet relevant international standards (e.g., IEC, EN).
• Scannability: Uses bullet points for easy reading.
• Data Structure: Good for potential rich snippets/structured data.
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Function and Application

The Siemens 3MT8040-1AL24 contactor serves as a critical electrical switch, primarily used for remotely controlling and protecting electric motors. Its core function is to make or break an electrical circuit under normal load conditions, particularly for switching three-phase AC motors.

Key Function

• Motor Control: Facilitates the starting and stopping of electric motors, especially in high-power industrial machinery.
• Overload Protection Integration: Designed to work seamlessly with thermal overload relays, providing comprehensive motor protection against overcurrents.
• Safety Interlocking: Can be integrated into complex control circuits for safety interlocking functions, preventing unintended operations.
• Remote Switching: Enables remote control of power circuits, enhancing operational flexibility and safety.

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