Siemens 3TB4311-0XH0 Contactor 11 kW, 48 V AC Coil, 1 NC Auxiliary Contact, Size 1 Original Brand New

Overview

The Siemens 3TB4311-0XH0 is a high-performance 3-pole contactor designed for reliable switching of electrical loads, particularly in motor control applications. This size 1 contactor is built for durability and efficiency, featuring a 48 V AC, 50 Hz coil and a robust construction. It is engineered to meet the demanding requirements of industrial automation and control systems, ensuring long-term operational stability.

Key Features & Specification

• Product Number: 3TB4311-0XH0
• Contactor Type: 3-pole
• Coil Voltage: 48 V AC, 50 Hz
• Rated Operational Current (AC-3, 400V): 22 A
• Rated Operational Power (AC-3, 400V): 11 kW
• Auxiliary Contacts: 1 NC (Normally Closed)
• Size: 1
• Connection Type: Screw terminals
• Mounting: Standard rail or screw mounting
• Durability: High mechanical and electrical life
• Compliance: Designed to meet international standards for safety and performance.

Benefit

• Reliable Performance: Siemens is a leader in industrial components, and the 3TB4311-0XH0 contactor offers consistent and dependable switching performance.
• Energy Efficient: The optimized coil design minimizes power consumption during operation, leading to lower energy costs.
• Enhanced Safety: The integrated 1 NC auxiliary contact provides a critical feedback signal for safety circuits and interlocking functions.
• Easy Installation: Screw terminals and a compact size 1 design make installation and wiring straightforward, reducing setup time.
• Long Service Life: Built with high-quality materials, this contactor is designed to withstand frequent switching cycles, reducing the need for maintenance and replacement.
• Versatile Application: Suitable for a wide range of applications, including pumps, fans, conveyors, and other industrial machinery.

Function

The Siemens 3TB4311-0XH0 contactor is an electromagnetically operated switching device. When the 48 V AC, 50 Hz coil is energized, it generates a magnetic field that pulls the main contacts closed. This action allows power to flow to the connected load, such as a motor. The 1 NC auxiliary contact simultaneously opens, providing a signal that the main circuit is closed. When the coil is de-energized, springs force the contacts back to their open state, interrupting the power flow and de-energizing the load.

Application

• Motor control for pumps, compressors, and fans
• HVAC systems
• Industrial machine control panels
• Lighting control systems
• Heating element switching
• Automation and process control systems

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