3RT1944-5AL21

The Siemens 3RT1944-5AL21 is a dedicated operating coil for the 3RT1044 (S3 size) large contactor. According to the Siemens coil code system, it is rated for AC 230V, 50/60Hz dual frequency. It can be replaced individually to extend the contactor's life. Kenxin Motor provides selection assistance.

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Siemens 3RT1944-5AL21 coil, 230V AC, for use with 3RT1044 S3 contactor.

Product Positioning

3RT1944-5AL21 is the operating coil of the Siemens SIRIUS large 3RT10 series contactor, specifically designed for the 3RT1044 (S3 size, AC-3 65A, 30kW/400V) model. Cross-referencing multiple models in the same series using the Siemens coil code system, the AL21 code corresponds to a rated voltage of AC 230V and a frequency of 50/60Hz dual frequency. Kenxin Motor is an authorized Siemens distributor; we recommend providing a photo of the actual nameplate before placing an order for secondary verification to ensure the model is correct.

Core Product Advantages and Features

Original factory compatible models

Designed specifically for the operating mechanism of the 3RT1044 (S3 size) large contactor.

230V Dual-Frequency Coil Code

Siemens AL21 coil code system comparison, rated AC 230V, 50/60Hz

Replacing separately saves costs

When the coil is damaged, it can be replaced individually; there is no need to replace the entire contactor group.

Kenxin Motor Selection Assistance

Authorized agents assist in verifying nameplate information to reduce the risk of selecting the wrong model.

project	Specification
model	3RT1944-5AL21
Product Type	Contactor operating coil
Rated voltage (code reference)	AC 230V
Rated frequency (code reference)	50/60 Hz
Applicable product series	SIRIUS 3RT10 Large Contactor
Applicable models	3RT1044 (S3 size)
Original brand	Siemens

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3RT1944-5AP01

The Siemens 3RT1944-5AP01 is a dedicated operating coil for the 3RT1044 (S3 size) large contactor. It is rated for AC 230V, 50Hz single frequency, and uses screw terminal wiring. It can be replaced individually to extend the contactor's life. Kenxin Motor provides original factory genuine product verification.

3RT1944-5AC21

Replacement coils for Siemens SIRIUS large contactors, AC 24V specification, screw terminal wiring, compatible with 3RT1044 series S3 size contactors. Suitable for factory spare parts inventory and emergency repair of sudden failures. Kenxin Motor has stock available and can provide selection consultation services.

3RT1944-5AG21

Replacement coils for Siemens SIRIUS large contactors, compatible with the 3RT1044 series S3 size contactors. The voltage code is consistent with the 110V specification coils of the same series. Screw terminal wiring. Suitable as a factory backup spare part. It is still recommended to confirm the nameplate information with Kenxin Motor before placing an order to ensure that the actual voltage is correct.