Siemens 3TB3910-0XG2 Contactor 6A, 2.2kW, 110V AC Coil, with 1 NO Auxiliary Contact Original Brand New

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The Siemens 3TB3910-0XG2 is a high-performance 3-pole AC contactor designed for reliable switching of electrical loads in industrial automation, motor control, and power distribution applications. With a robust design and a compact “Size 0” footprint, this contactor is engineered to handle an AC-3 rated current of 6A at 400V, providing a switching capacity of up to 2.2 kW. It features a 110V AC coil for efficient operation and includes a single normally open (1 NO) auxiliary contact, offering enhanced functionality for control and signaling circuits. The secure screw connection terminals ensure a reliable and durable electrical connection, making it an ideal choice for a wide range of machinery and control panels.

Key Features & Specification

• Product Number: Siemens 3TB3910-0XG2
• Operating Frequency: 50/60 Hz
• Coil Voltage: 110 V AC
• Rated Operational Current (AC-3): 6 A @ 400 V
• Rated Operational Power (AC-3): 2.2 kW
• Number of Poles: 3-pole main contacts
• Auxiliary Contacts: 1 NO (Normally Open)
• Size: Size 0
• Connection Type: Screw terminals
• Mounting: DIN rail or screw mounting
• Standard: IEC 60947

Benefit

• Reliable Performance: Engineered by Siemens, a global leader in industrial automation, for consistent and long-lasting operation in demanding environments.
• Space-Saving Design: The compact “Size 0” frame allows for efficient use of space within control cabinets and panels.
• Enhanced Functionality: The integrated 1 NO auxiliary contact provides flexibility for building interlocking circuits, status indication, and other control functions without the need for an additional auxiliary block.
• Easy & Secure Installation: Screw connection terminals provide a strong, vibration-resistant electrical connection, simplifying installation and maintenance.
• Versatile Application: Suitable for a broad range of applications, including motor control, lighting systems, heating, and power supply switching.

Function

The Siemens 3TB3910-0XG2 contactor operates by using a 110V AC coil to create an electromagnetic field. When the coil is energized, it attracts the armature, causing the main power contacts to close and allow current to flow to the connected load. Simultaneously, the integrated 1 NO auxiliary contact also closes, providing a signal that the contactor is active. When the coil is de-energized, springs return the armature to its original position, opening both the main and auxiliary contacts and interrupting the power supply.

• Main Function: Switching of electrical loads up to 6A (AC-3) at 400V.
• Auxiliary Function: The 1 NO contact can be used for:
  • Feedback loops and control systems.
  • Activating indicator lights (e.g., “Motor On”).
  • Interlocking other components in a circuit.

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