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Siemens 3TF6833-1QG7 Vacuum Contactor | 690V

Siemens 630A Vacuum Contactor with Reversing Contactor & 3NO+3NC Aux.

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ManufacturerSiemens

Part number3TF6833-1QG7

Part Number 3TF6833-1QG7

Manufacturer Siemens

Type Vacuum Contactor

Poles 3

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Vacuum switching technology 630A rating 335kW power handling Built-in reversing contactor 3 NO + 3 NC auxiliary contacts 110-120V AC coil

Product description

The Siemens 3TF6833-1QG7 is a high-performance vacuum contactor designed for demanding AC-3e/AC-3 applications. It is rated for 630 Amps and 335 kW at 400V, with a maximum system voltage of 690V. This 3-pole contactor features a conventional rectifier bridge with a built-in reversing contactor and 3 normally open (NO) + 3 normally closed (NC) auxiliary contacts. The coil operates on 110-120V AC (50/60 Hz) and utilizes screw terminals for both control and auxiliary circuits.

This vacuum contactor is ideal for applications requiring frequent switching and high reliability in challenging environments, such as industrial motor control, power factor correction, and switching of high-voltage equipment. Industries benefiting from this part include power generation, heavy manufacturing, and material processing.

Stanlo Automation, a veteran-owned company, provides this Siemens 3TF6833-1QG7 vacuum contactor as part of our commitment to offering high-quality, cost-effective surplus automation solutions. We ensure our parts meet stringent standards, supporting your operational continuity.

Technical specifications

Part Number	3TF6833-1QG7
Manufacturer	Siemens
Type	Vacuum Contactor
Poles	3
AC-3e/AC-3 Rating	630A, 335kW @ 400V
Max Voltage	690V
Coil Voltage	110-120V AC
Auxiliary Contacts	3 NO + 3 NC
Drive	Conventional Rectifier Bridge with Reversing Contactor
Terminals	Screw

Common applications

Motor Control

High Voltage Switching

Power Factor Correction

Industrial Automation

Manufacturing

Power Generation

Material Handling

Compatible systems

Industrial Motor Control Systems Switchgear Power Distribution Panels

Also known as

Siemens 3TF6833 3TF6833 Vacuum Contactor Siemens Reversing Contactor

Replaces / compatible with

This Siemens vacuum contactor replaces older or less efficient air-break contactors in applications demanding higher reliability and faster switching speeds. Suitable for systems previously using similar rated contactors.

Technical note

Expert tip

The conventional rectifier bridge ensures a stable DC control voltage for the coil, even with fluctuating AC supply, enhancing operational reliability for the reversing function.

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Frequently asked questions

What is the function of the built-in reversing contactor in the Siemens 3TF6833-1QG7?

The built-in reversing contactor in the Siemens 3TF6833-1QG7 allows for simple and safe forward/reverse control of motors without requiring external wiring for two separate contactors. This reduces panel space and installation complexity.