Siemens 3TB4311-0XD0 Contactor 42V AC, 22A, 11kW, 1NC Auxiliary Contact Original Brand New

Overview

The Siemens 3TB4311-0XD0 is a robust and reliable contactor designed for controlling electric motors and other electrical loads. This specific model operates with an AC control voltage of 42V at 50 Hz. It is rated for an AC-3 load of 22A at 400V, capable of handling motors up to 11 kW. The contactor features a single normally closed (1 NC) auxiliary contact, making it suitable for a variety of control applications. Its compact size 1 design and secure screw connection terminals ensure easy installation and a stable electrical connection.

Key Features & Benefit

• High Performance: Rated for 11 kW (400V AC-3), it efficiently controls high-power motors and electrical loads.
• Safety & Reliability: The inclusion of a 1 NC auxiliary contact allows for integration into safety circuits, interlocking systems, and status monitoring.
• Durability: Siemens’ trusted engineering ensures a long operational life and consistent performance in demanding industrial environments.
• Simple Installation: The screw connection terminals provide a secure and straightforward method for wiring, reducing installation time and effort.
• Versatile Application: Ideal for use in a wide range of industrial automation, motor control, and power distribution systems.

Function

The Siemens 3TB4311-0XD0 functions as an electrically operated switch. When the 42V AC, 50 Hz coil is energized, the main contacts close, allowing power to flow to the connected load. Simultaneously, the 1 NC auxiliary contact opens, which can be used to signal the contactor’s status or to create interlocking logic within a control circuit. It is a fundamental component in starter panels, motor control centers, and other industrial machinery where frequent switching of power circuits is required.

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