Overview
The Siemens 3TF6844-0C vacuum contactor is an industrial-grade switching device engineered for AC motor control and power distribution. The 3TF6844-0C is a 3-phase IEC rated contactor used for the control of electric motors. With a continuous current rating of 630A and vacuum arc suppression technology, this contactor delivers superior switching performance and extended contact life in demanding applications.
Key Features
- 3-phase IEC rated contactor for electric motor control
- Rated 250 HP at 230V and 500 HP at 460V
- 4NO and 4NC auxiliary contacts
- Vacuum contactors include contact wear indicators as standard
- Vacuum arc extinction technology for smooth, reliable switching
- Suitable for squirrel cage and slip-ring motors, solenoids, capacitor banks, and heating loads
Technical Specifications
- Continuous Current Rating: 630A
- Number of Poles: 3
- Contact Type: Vacuum
- Horsepower Ratings: 250 HP @ 230V, 500 HP @ 460V
- Auxiliary Contacts: 4NO and 4NC
- Operating Principle: AC magnetic contactor
- Mounting: Screw mounting facility
- Contact Wear Indicator: Standard feature
- Country of Origin: Germany
- Certification: UL File E31519, IEC rated
- Type: Definite purpose contactor
Typical Applications
- AC induction motor starting and control
- Industrial pump and fan systems
- Compressor control circuits
- Heavy-duty heating and resistive load switching
- Solenoid and capacitor bank control
- Severe-duty industrial environments requiring reliable power distribution
Compatibility & Replacements
Compatible With
- Siemens 3TF6 series motor starter systems
- IEC motor control circuits and panels
- Siemens Sirius control systems
- Standard AC 50/60 Hz industrial power distribution
- Motor starter cabinets rated for 630A applications
Replaces / Drop-In Replacement For
- Other 3TF6844 variants with different coil voltages (M7, Q7 suffix variants)
- Legacy 3TF6 vacuum contactors of equivalent rating
Works With
- AC 50/60 Hz power systems
- IEC motor control standards and architectures
- Standard AC coil configurations (220V, 230V, 240V, 380V, 415V, 480V variants available)
- Panel-mount and screw-mounted enclosure installations
