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3TF6844-0CM7

The Siemens 3TF6844-0CM7 is a heavy-duty contactor from the SIRIUS 3TF series, designed for high-power motor control and industrial switching applications. This 3-pole contactor offers reliable performance in demanding environments with its robust construction and high switching capacity.

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TEL：400-887-3214
Mail：jilineasyyi@outlook.com
Q Q：615739355
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Key Specifications
Electrical Characteristics

Rated Operational Current: 250A (AC-3, 400V)

Rated Insulation Voltage: 1000V AC

Coil Voltage: 230V AC (standard variant)

Switching Capacity:

AC-3: 132kW (400V)

AC-1: 250kW (400V)

Contact Configuration

3 NO (Normally Open) main contacts

Auxiliary Contacts: 2 NO + 2 NC (standard)

Contact Material: Silver alloy with special arc-resistant design

Mechanical Design

Modular construction for easy maintenance

Screw-type terminals (accepts 16-150mm² conductors)

Protection Degree: IP00 (terminal protection available with accessories)

Mechanical Life: 1 million operations

Electrical Life: 100,000 operations (AC-3)

Special Features

Arc chutes for effective arc suppression

Surge suppression for coil protection

Mechanical interlocks available for reversing applications

Thermal overload relay compatibility (3RU series)

Standards Compliance

IEC/EN 60947-4-1

UL 508

CSA C22.2 No. 14

CE, RoHS compliant

Typical Applications
Heavy-duty motor control (cranes, compressors, pumps)

Industrial power distribution

Mining equipment

Marine applications

HVAC systems for large buildings