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Siemens SIRIUS 3RT1045-3KF44-0LA0

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3RT1045-3KF44-0LA0

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The Siemens 3RT1045-3KF44-0LA0 power contactor from the SIRIUS series is designed for effective power management in industrial applications. It operates at a rated power of 37 kW at 400 V and features a control voltage of 110 V DC.

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Technical specifications for 3RT1045-3KF44-0LA0

ManufacturerSiemens
Product TypePower Contactor (AC-3)
Product LineSIRIUS
Part Number3RT1045-3KF44-0LA0
UPC754554737805
Weight2.94 lbs (1.33 kg)
Control Voltage110 V DC
Rated Power37 kW @ 400 V
Connection TypeCage Clamp
Insulation Voltage690 V
Poles3
Rated Operating Current80 A
Utilization CategoryAC-3
Electrical Life~1 million operations
Voltage Range0.7–1.25 × Us
Rated Operating Voltage400 V AC
Mounting TypeDIN Rail
Operating Frequency50/60 Hz
Contactor SizeS3
Degree of ProtectionIP20
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The 3RT1045-3KF44-0LA0 model from Siemens is a power contactor noted for its reliability in AC-3 applications. With an operating voltage of 400 V AC, it supports a control voltage of 110 V DC, indicating its versatility in various setups. This contactor is rated for a maximum current of 80 A and covers a rated power capacity of 37 kW at the standard input voltage. Designed for substantial electrical performance, it can endure around one million electrical operations before maintenance might be necessary.

The contactor features a cage clamp connection type, facilitating easy wiring and ensuring secure connections. It is arranged with three poles for effective control over the power flow. The Siemens 3RT1045-3KF44-0LA0 also boasts an insulation voltage rating of 690 V, underscoring its capability to manage high voltage environments safely.

For installation, this contactor utilizes a DIN rail mounting method, which simplifies the mounting process within control panels. The device operates at a frequency of 50 or 60 Hz, making it adaptable to a variety of systems. The contactor’s size is classified as S3, and it holds an IP20 protection rating, implying that it is suitable for indoor environments where it is not exposed to moisture or dust.