Siemens 3TF6944-8CF7 Vacuum Contactor - 630A, 335kW
Siemens 3TF6944-8CF7 3-pole vacuum contactor.
The Siemens 3TF6944-8CF7 is a 3-pole vacuum contactor designed for AC-3e applications. It is rated for 630 A at 335 kW for 400V systems and can handle AC-3 loads of 820 A at 450 kW for 400V. This unit operates with a coil voltage of 110-132V AC (50/60 Hz) and is suitable for systems up to 1000V. It features conventional auxiliary contacts with 4 normally open (NO) and 4 normally closed (NC) configurations, and utilizes screw terminals for main and auxiliary circuits.
This vacuum contactor is ideal for switching high-power industrial loads, particularly in applications requiring frequent switching or where arc suppression is critical. Industries such as power generation, mining, metal processing, and large motor control systems commonly utilize this type of robust switching device.
Stanlo Automation, a veteran-owned business, offers the Siemens 3TF6944-8CF7 as part of its extensive inventory of surplus industrial automation components. Sourcing from Stanlo ensures you receive reliable, quality parts while supporting a trusted supplier with a commitment to service and value.
| Poles | 3 |
| Rated operational current AC-3e | 630 A |
| Rated operational power AC-3e | 335 kW @ 400V |
| Rated operational current AC-3 | 820 A |
| Rated operational power AC-3 | 450 kW @ 400V |
| Max. Voltage (Ue) | 1000 V |
| Coil Voltage (Uc) | 110-132 V AC |
| Frequency | 50/60 Hz |
| Auxiliary Contacts | 4 NO + 4 NC |
| Connection Type | Screw Terminal |
| Series | 3TF6 |