Siemens 3TB4122-0XC2 Contactor 24V AC, 12A, 5.5kW with 1 NO + 1 NC Auxiliary Contact Original Brand New

Overview

The Siemens 3TB4122-0XC2 is a robust and reliable contactor designed for industrial control applications. This AC-operated contactor is engineered to handle demanding electrical loads with high efficiency and safety. Featuring a compact size 0 design and secure screw connections, it is ideal for seamless integration into a wide range of control panels and machinery. The unit operates on a 24V AC 50/60 Hz coil and is rated for a 12A current at 400V in AC-3 operation, with a corresponding power rating of 5.5kW. Its built-in 1 normally open (NO) and 1 normally closed (NC) auxiliary contacts provide enhanced flexibility for signaling and interlocking circuits.

Key Features & Benefit

• Reliable Performance: Built to Siemens’ high-quality standards, ensuring long-term reliability and operational stability in challenging industrial environments.
• Energy Efficient: Optimized design minimizes power consumption during operation, contributing to overall energy savings.
• Versatile Application: Suitable for a broad spectrum of AC motor control, lighting, and heating applications due to its robust electrical ratings and auxiliary contacts.
• Safety & Durability: Constructed with high-grade materials to withstand electrical and mechanical stress, providing enhanced safety and a longer service life.
• Easy Installation: The size 0 footprint and intuitive screw connections simplify mounting and wiring, reducing installation time and effort.
• Integrated Auxiliary Contacts: The 1 NO + 1 NC contacts offer built-in functionality for feedback, control logic, and interlocking, eliminating the need for external add-on blocks in many cases.

Function

The Siemens 3TB4122-0XC2 contactor acts as an electrically controlled switch, primarily used for remotely controlling a power circuit. When the 24V AC coil is energized, it generates a magnetic field that closes the main power contacts, allowing current to flow to the connected load (e.g., a motor). Simultaneously, the auxiliary contacts change state—the NO contact closes and the NC contact opens—which can be used to provide status signals to a PLC, interlock with other devices, or create control circuits. When the coil is de-energized, a spring returns all contacts to their original position, safely disconnecting the power to the load.

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