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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3TF6944-0CM7-Z |
| Alternative Part Number | 3TF69440CM7Z |
| Manufacturer | Siemens |
| Contactor Size | 14 |
| Number of Poles | 3 |
| Operating Current at AC-1, 400V | 910 A |
| Operating Current at AC-3, 400V | 820 A |
| Operating Performance at AC-3, 400V | 450 kW |
| Operating Performance at AC-1, 400V | 558 kW |
| Auxiliary Contacts | 44 (4NO+4NC) |
| Control Supply Voltage Frequency | 50/60 Hz |
| Control Supply Voltage at AC | 200...240 V |
| Type of Voltage of Control Supply | AC |
| Mounting Type | Screw fixing |
| Side-by-Side Mounting | Yes |
| Width | 230 mm |
| Height | 295 mm |
| Depth | 237 mm |
| Protection Class IP | IP00 |
| Ambient Operating Temperature | -25°C to +55°C |
| Electrical Connection Type | Screw-type terminals for main current circuit and auxiliary/control current circuit |
| Approval | General Product Approval, Functional Safety/Safety of Machinery, Type Examination, Declaration of Conformity, Test Certificates |
| Reference Code | K (according to DIN 40719 extended according to IEC 204-2 / according to IEC 750), Q (according to DIN EN 61346-2) |
The Siemens 3TF6944-0CM7-Z is a robust and high-performance contactor designed to meet the demands of industrial power control and switching applications. This contactor is part of the size 14 range and is capable of handling 3-pole AC-3 operations up to 450 kW at 400/380V (690V). It features auxiliary contacts configured as 44 (4NO+4NC), providing flexibility for various control circuit arrangements.
Constructed to withstand a wide ambient temperature range from -25°C to 55°C, the 3TF6944-0CM7-Z ensures reliable operation even in challenging environmental conditions. The contactor is equipped with screw-type terminals for both the main current circuit and auxiliary and control current circuits, facilitating secure and straightforward connections.
With a control supply voltage rated at 200 to 240V AC at 50/60Hz, this contactor is versatile and can be integrated into diverse electrical systems without the need for overvoltage damping in the main circuit. The mechanical design allows for screw fixing and side-by-side mounting, making it a practical choice for space-saving installations.
The Siemens 3TF6944-0CM7-Z is a testament to Siemens' commitment to quality and reliability in industrial control components, offering a dependable solution for managing high-capacity motors and loads.
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Frequently Asked Questions
What is the size of the contactor?
The contactor is size 14, which is suitable for heavy-duty applications.
Can this contactor be used for AC-3 applications?
Yes, this contactor is designed for AC-3 applications and can handle up to 450 kW at 400/380V.
What is the operating current rating for this contactor in an AC-1 setup?
In an AC-1 setup at 400V, the operating current rating is 910 A at an ambient temperature of 40°C.
What type of auxiliary contacts does this contactor have?
This contactor comes with auxiliary contacts designated as 44, which means it has 4 normally open (NO) and 4 normally closed (NC) contacts.
What are the dimensions of this contactor?
The contactor has a width of 230 mm, a height of 295 mm, and a depth of 237 mm.
Is side-by-side mounting possible with this contactor?
Yes, side-by-side mounting is possible with this contactor, allowing for efficient use of space within a panel.
What is the control supply voltage range for this contactor?
The control supply voltage range for this contactor is 200 to 240V AC at both 50 and 60 Hz.
What type of electrical connection does this contactor support?
This contactor supports screw-type terminals for both the main current circuit and the auxiliary and control current circuit.
What is the protection class IP rating on the front of this contactor?
The protection class IP rating on the front of this contactor is IP00.
What is the ambient temperature range for operating this contactor?
The ambient temperature range for operating this contactor is between -25°C and 55°C.
Part conditions explained
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