Siemens 3TB4122-0XR0 Contactor 12A, 5.5kW, 415V AC, Size 0, Screw Connection Original Brand New

Overview

The Siemens 3TB4122-0XR0 is a high-performance 3-pole contactor designed for reliable switching and control of electric motors and other resistive loads. As part of the SIRIUS family, it is engineered for exceptional durability and long service life in demanding industrial environments. This Size 0 contactor is perfectly suited for a wide range of applications, providing a robust and efficient solution for motor starters, lighting control, and heating systems.

Technical Specification

• Product Number: 3TB4122-0XR0
• Contactor Type: 3-pole
• Rated Operational Voltage: 415V AC
• Rated Operational Current (AC-3): 12 A (at 400V)
• Rated Power (AC-3): 5.5 kW (at 400V)
• Coil Voltage: 50 Hz, 415 V AC
• Auxiliary Contacts: 1 Normally Open (NO) + 1 Normally Closed (NC)
• Contactor Size: Size 0
• Connection Type: Screw terminals
• Mounting: Snap-on mounting onto DIN rail or screw mounting
• Product Family: SIRIUS

Benefit & Features

• Robust Performance: Built for a long electrical and mechanical service life, ensuring consistent and dependable operation in industrial settings.
• Versatile Application: Ideal for switching motors, resistive loads, and other general-purpose applications up to 5.5 kW.
• Integrated Auxiliary Contacts: Comes standard with 1 NO and 1 NC auxiliary contacts, simplifying circuit design for signaling, interlocking, and control purposes without the need for external contact blocks.
• Secure Screw Connection: Provides a strong, vibration-resistant electrical connection, minimizing the risk of faults and downtime.
• Compact Design: The Size 0 form factor saves valuable panel space, making it a great choice for tight enclosures and compact machine designs.
• Easy Installation: Designed for quick and hassle-free installation on a standard DIN rail or with screw mounting.

Function

The Siemens 3TB4122-0XR0 contactor acts as an electrically operated switch. When its 415V AC, 50 Hz coil is energized, the main contacts close, allowing power to flow to the connected load (e.g., an electric motor). Simultaneously, the auxiliary contacts change state—the NO contact closes and the NC contact opens—to provide feedback for control systems or to interlock with other devices. This simple yet critical function makes it a fundamental component in motor control circuits, control panels, and automation systems.

Application

• Motor starters for small to medium-sized motors
• Lighting control systems
• Heating and ventilation (HVAC) systems
• Pumps and fan control
• General industrial machine control

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