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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3TF6944-0CM7-ZA02 |
| Alternative Part Number | 3TF69440CM7ZA02 |
| Manufacturer | Siemens |
| Contactor Size | 14 |
| Poles | 3-pole |
| Operating Current at AC-1, 400V | 910 A (at 40 °C ambient temperature) |
| 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, 50 Hz | 200 to 240 V |
| Control Supply Voltage at AC, 60 Hz | 200 to 240 V |
| Connection Type | Screw-type terminals for main, auxiliary, and control current circuit |
| Mounting Type | Screw fixing, series installation possible |
| Width | 230 mm |
| Height | 295 mm |
| Depth | 237 mm |
| Protection Class IP | IP00 |
| Ambient Operating Temperature | -25 to +55 °C |
| Reference Code | K (according to DIN 40719 extended according to IEC 204-2 / IEC 750), Q (according to EN 61346-2) |
The Siemens 3TF6944-0CM7-ZA02 is a robust contactor designed to handle high power switching applications with ease. This component is part of the size 14 contactor range and is engineered to manage AC-3 category loads up to 450 kW at 400/380V (690V). It features a 3-pole configuration and comes equipped with auxiliary contacts configured as 44 (4NO+4NC), providing flexibility for various control and signalling circuits.
Constructed to operate within a wide ambient temperature range of -25°C to 55°C, this contactor ensures reliable performance in diverse working environments. The contactor's main current circuit is rated for an operating current of 820 A at AC-3 at 400 V, and it boasts an impressive operating performance of 558 kW at AC-1 at 400 V, highlighting its capability to handle substantial electrical loads.
The control circuit is designed for conventional activation with an AC voltage type for the control feed. It operates efficiently with a control supply voltage frequency of 50/60 Hz and a rated control supply voltage of 200 to 240V AC at both frequencies.
For installation, the Siemens 3TF6944-0CM7-ZA02 offers a screw fixing mounting type, which facilitates secure and straightforward integration into various setups. Its mechanical dimensions, with a width of 230 mm, height of 295 mm, and depth of 237 mm, make it a compact yet powerful solution for industrial applications.
This contactor is also designed with screw-type terminals for both the main current circuit and auxiliary and control current circuits, ensuring a reliable and durable connection. The identification number and letter for switching elements is 44, which is standard for this type of contactor.
The Siemens 3TF6944-0CM7-ZA02 is a testament to the brand's commitment to quality and reliability, making it a suitable choice for industrial professionals seeking a high-performance contactor for demanding applications.
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Frequently Asked Questions
What size is the contactor?
The contactor is size 14, which is suitable for heavy-duty applications.
Can this contactor be used in different ambient temperatures?
Yes, it is designed to operate within an ambient temperature range of -25°C to 55°C.
What is the protection class of the contactor on the front?
The protection class on the front of the contactor is IP00.
What are the main current circuit specifications?
The main current circuit has 3 poles, with an operating current at AC-1 / at 400 V rated at 910 A, and at AC-3 / at 400 V rated at 820 A.
What is the operating performance of the contactor at AC-3 and AC-1?
At AC-3 / at 400 V, the rated operating performance is 450 kW, and at AC-1 / at 400 V, it is 558 kW.
How is the operating mechanism of the contactor activated?
The operating mechanism of the contactor is activated conventionally.
What is the voltage type for the control feed?
The control feed voltage type is AC.
What are the control supply voltage specifications?
The control supply voltage at 50 Hz and 60 Hz is rated at AC 200 to 240V.
How many auxiliary contacts does the contactor have?
The contactor has 4 NC (normally closed) and 4 NO (normally open) auxiliary contacts for instantaneous switching.
What type of connection does the contactor have?
The contactor has screw-type terminals for both the main current circuit and the auxiliary and control current circuit.
What are the dimensions of the contactor?
The contactor has a width of 230 mm, a height of 295 mm, and a depth of 237 mm.
Can the contactor be mounted in series?
Yes, the contactor is designed for screw fixing and can be mounted in series.
What certifications does the contactor have?
The contactor has general product approval and may include various certifications such as Type Examination, Declaration of Conformity, and Test Certificates.
