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Siemens 3TF3211-0BB4 Size 1 Contactor — 7.5kW, 24V DC Coil

Siemens 3TF3211-0BB4 Size 1 Contactor, 7.5kW, 400V, 24V DC coil.

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ManufacturerSiemens

Part number3TF3211-0BB4

Contactor Size 1

Poles 3

AC-3 Rating 7.5 kW

Voltage 400/380 V

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Size 1 Contactor 7.5kW Switching Capacity 3-Pole Design 24V DC Coil AC-3 Rated Robust Siemens Construction

Product description

The Siemens 3TF3211-0BB4 is a Size 1, 3-pole contactor designed for switching AC-3 loads up to 7.5 kW at 400/380V. This particular model operates with a 24V DC coil voltage and does not come with integrated auxiliary contacts, though they can be added separately. It is built for reliable power switching in demanding industrial applications, ensuring safe and efficient motor control.

This contactor is ideal for motor starting applications, load shedding, and general power control in industries such as manufacturing, material handling, and building automation. Its robust design ensures long operational life even under frequent switching cycles, making it a dependable component for controlling motors, heaters, and other high-power loads.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3TF3211-0BB4 contactor. We provide quality, tested components to ensure your automation systems remain operational. Source your Siemens contactors and other industrial parts from Stanlo Automation for reliable service and value.

Technical specifications

Contactor Size	1
Poles	3
AC-3 Rating	7.5 kW
Voltage	400/380 V
Coil Voltage	24 V DC
Auxiliary Contacts	None (add-on possible)

Common applications

Motor Control

Industrial Machinery

Manufacturing Automation

HVAC Systems

Pump Control

Switchgear

Compatible systems

Siemens Control Relays Motor Protection Relays 24V DC Control Circuits Industrial Power Distribution

Also known as

Siemens 3TF1 Contactor Size 1 7.5kW DC Contactor Siemens 24V DC Contactor

Replaces / compatible with

Compatible with Siemens 3TX40118A auxiliary contact blocks.

Technical note

Expert tip

This contactor requires a side-mounted auxiliary contact block, such as the 3TX40118A, if auxiliary contacts are needed for control or signaling circuits.

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Frequently asked questions

What is the maximum power rating for the Siemens 3TF3211-0BB4 contactor?

The Siemens 3TF3211-0BB4 is rated for AC-3 duty with a maximum switching capacity of 7.5 kW at 400/380V. It features a 24V DC coil and is a 3-pole contactor.