What is 3RT5044-1AN20?

It is a 3-pole power contactor from the Siemens SIRIUS series, Size S3, primarily used for switching high-power motor loads.

What is the rated coil voltage of 3RT5044-1AN20?

Its rated control supply voltage for the coil is 220 V AC (50/60 Hz).

How to use products like 3RT5044-1AN20?

Install it in a control cabinet and receive a 220V AC signal through the coil terminals to close the contacts, thereby connecting or disconnecting the power supply to high-power equipment.

What auxiliary contacts does 3RT5044-1AN20 provide?

This model usually does not have integrated auxiliary contacts or depends on configuration, but multiple side or top-mounted auxiliary blocks can be easily added.

Does 3RT5044-1AN20 support DIN rail mounting?

Yes, it can be mounted on a standard 35mm or 75mm DIN rail, but screw mounting is also recommended for added stability.

3RT5044-1AN20

Name: 3RT5044-1AN20
Brand: Siemens
SKU: 3RT5044-1AN20

Power contactor

Product image is representative; revision or series may vary. Contact us to request a specific version.

Product Describe：

Power contactor
Contactor AC 220 V 50/60 HZ
AC3 30 kW 400 V 3-pole

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Technical specifications for 3RT5044-1AN20

Manufacturer:

Siemens
Product Category:

PLC Systems
Spare Part Number:

3RT5044-1AN20
Estimated shipping dimensions:

7x14.6x13.9cm
Weight:

1.82 kg
Tariff Code:

8537101190
Counliy of origin:

GERMANY
Size of contactor:

S3
Insulation voltage rated value:

1000 V
Degree of pollution:

3
Surge voltage resistance rated value:

6 kV
ambient temperature9（ during operation）:

-25 ... +60 °C
ambient temperature9（ during storage）:

-55 ... +80 °C
Installation altitude at height above sea level maximum:

2000 m

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Information

Overview Manuals Common Applications Product Precautions

The 3RT5044-1AN20 is a SIRIUS 3RT5 series AC contactor manufactured by Siemens. It is typically used in industrial automation control systems to remotely connect and disconnect motors or other electrical loads.

Heavy-Duty Performance
Exceptional Service Life
Seamless Modularity

The 3RT5044-1AN20 is a heavy-duty SIRIUS Size S3 power contactor designed for demanding industrial environments. Featuring a universal 220V 50/60Hz coil and a robust switching capacity of 65A / 30kW at 400V, it serves as a cornerstone for controlling large-scale motors and inductive loads. Its combination of superior mechanical endurance, secure screw terminal technology, and extensive modular expansion potential makes it the optimal choice for ensuring long-term operational stability and efficiency in industrial power control systems.

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.

Siemens 3RT5044-1AN20 Power contactor Manuals, Datasheets, Drivers, Link

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.

Mining

Controlling heavy-duty belt conveyors for long-distance mineral transportation.

Cement Industry

Powering large cooling fans or auxiliary drive systems for rotary kilns.

Steel & Metallurgy

Controlling blast furnace blowers to ensure a steady air supply during smelting.

Power Generation

Managing coal feeders or ash handling conveyor motors in coal-fired power plants.

Pulp & Paper

Powering high-speed motors in large pulp refiners or paper cutting machines.

Construction Machinery

Controlling the hoisting motors of tower cranes or large-scale concrete mixers.

When using the Siemens 3RT5044-1AN20, ensure the coil voltage is stable at 220V AC to prevent burnout. Since it carries high power (65A/30kW), all main circuit terminals must be securely tightened, and contacts should be regularly inspected for erosion to avoid overheating. Additionally, for high-frequency switching or inching (AC-4) duties, strictly follow the derating curves. It is highly recommended to install a surge suppressor on the coil side to eliminate inductive spikes and protect the integrity of the upstream control system and auxiliary signals.

FAQ View All FAQ

What is 3RT5044-1AN20?

It is a 3-pole power contactor from the Siemens SIRIUS series, Size S3, primarily used for switching high-power motor loads.
What is the rated coil voltage of 3RT5044-1AN20?

Its rated control supply voltage for the coil is 220 V AC (50/60 Hz).
How to use products like 3RT5044-1AN20?

Install it in a control cabinet and receive a 220V AC signal through the coil terminals to close the contacts, thereby connecting or disconnecting the power supply to high-power equipment.

What auxiliary contacts does 3RT5044-1AN20 provide?

This model usually does not have integrated auxiliary contacts or depends on configuration, but multiple side or top-mounted auxiliary blocks can be easily added.
Does 3RT5044-1AN20 support DIN rail mounting?

Yes, it can be mounted on a standard 35mm or 75mm DIN rail, but screw mounting is also recommended for added stability.

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