Siemens 3TB4122-0XB0 Contactor, AC 50 Hz, 24V, 12A, 5.5kW, 1NO+1NC, Size 0 Original Brand New

Overview

The Siemens 3TB4122-0XB0 is a reliable and high-performance AC contactor designed for a wide range of industrial control applications. This contactor is a core component in motor starters, switching circuits, and other electrical control systems. It operates on an AC 50 Hz frequency and features a 24V AC coil voltage, making it suitable for various control circuit designs. With an operational rating of 12A for an AC3 load at 400V, it’s capable of handling a 5.5 kW power output. The device includes a single set of auxiliary contacts, consisting of one Normally Open (1 NO) and one Normally Closed (1 NC) contact, providing essential feedback and interlock functionality. Its compact size 0 form factor and convenient screw connection terminals ensure easy installation and secure wiring.

Benefit

• Reliable Performance: Engineered by Siemens, a leader in industrial automation, this contactor offers long-term reliability and consistent performance.
• Versatile Application: Ideal for controlling AC motors, heating elements, and lighting systems in industrial and commercial settings.
• Integrated Auxiliary Contacts: The built-in 1 NO + 1 NC contacts simplify wiring for control circuits, reducing the need for external components.
• Easy Installation: Screw connection terminals provide a secure and straightforward method for wiring, saving time during setup.
• Compact Design: The size 0 form factor is space-efficient, allowing for higher density installations in control cabinets.

Function

The Siemens 3TB4122-0XB0 contactor functions as an electrically operated switch. When the 24V AC coil is energized, it generates a magnetic field that pulls the main contacts closed, allowing power to flow to the connected load. When the coil is de-energized, the contacts open, interrupting the power. The auxiliary contacts switch their state in sync with the main contacts; the NO contact closes and the NC contact opens, which is useful for signaling, interlocking circuits, or controlling other devices. The AC3 rating indicates its suitability for switching three-phase squirrel-cage motors, which is a common industrial application.

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