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Siemens SIRIUS 3RT1045-3KB44-0LA0

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3RT1045-3KB44-0LA0

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The Siemens 3RT1045-3KB44-0LA0 is a robust power contactor designed for AC-3 applications, operating at a rated voltage of 400 V. This unit delivers an impressive rated power of 37 kW and manages currents up to 80 A.

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Technical specifications for 3RT1045-3KB44-0LA0

ManufacturerSiemens
Product TypePower Contactor (AC-3)
Product LineSIRIUS
Part Number3RT1045-3KB44-0LA0
UPC754554737799
Weight3.13 lbs (1.42 kg)
Rated Power37 kW @ 400 V
Poles3
Voltage Range0.7–1.25 × Us
Rated Voltage400 V AC
Contactor SizeS3
Power LossApprox. 3.5 W
Rated Current80 A
Connection TypeCage Clamp
Insulation Voltage690 V
Control Voltage24 V DC
Mounting TypeDIN Rail
Ambient Temp. Range–25 to +60°C
Operating Frequency50/60 Hz
Electrical Life~1 million operations
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Siemens presents the 3RT1045-3KB44-0LA0, a power contactor tailored for AC-3 applications. It is engineered to handle a rated power output of 37 kilowatts at a voltage of 400 volts AC, making it a strong candidate for heavy-duty tasks. This contactor is designed with three poles, optimal for versatile applications, and features a maximum rated current of 80 amperes. It operates within a specific voltage range of 0.7 to 1.25 times the rated voltage, ensuring adaptability to various scenarios.

Constructed as a size S3 unit, this contactor integrates a cage clamp connection type for straightforward installations. Its insulation voltage stands at 690 volts, providing added safety during operation. The control voltage for the device is set at 24 volts DC, making it suitable for various control systems.

The 3RT1045-3KB44-0LA0 is designed for mounting on DIN rails, facilitating efficient setup in control cabinets. It can function within ambient temperature extremes ranging from –25 degrees to +60 degrees Celsius, making it reliable in diverse environments. Its operational frequency spans 50 to 60 hertz, which is standard for many industrial applications. Additionally, this contactor exhibits an electrical life of approximately one million operations, ensuring longevity and reliability over extended use. Power loss during operation is about 3.5 watts, contributing to its efficiency.