3RT1945-5AG21

The Siemens 3RT1945-5AG21 is a dedicated operating coil for the 3RT1045 (S3 size) large contactor, rated at AC 110V, 50/60Hz, with screw terminal wiring. It can be replaced individually to extend the contactor's lifespan. Kenxin Motor provides genuine original parts and fast delivery service.

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Siemens 3RT1945-5AG21 coil, 110V AC, for use with 3RT1045 S3 contactor.

Product Positioning

The 3RT1945-5AG21 is the operating coil for the Siemens SIRIUS large 3RT10 series contactor. It has a rated voltage of AC 110V, a frequency of 50/60Hz, and uses screw terminal connections. It is specifically designed for the 3RT1045 (S3 size) model. This coil is a discontinued item from the original manufacturer; it is recommended to stock up in advance or consult for alternative solutions. Kenxin Motors is an authorized Siemens distributor and can assist customers in confirming inventory and compatible models.

Core Product Advantages and Features

110V AC specification

Rated voltage 110V, frequency 50/60Hz, suitable for low-voltage control circuits

Screw terminal wiring

On-site wiring is easy to install and maintenance personnel can operate intuitively.

Original factory compatible models

Designed specifically for the operating mechanism of the 3RT1045 (S3 size) large contactor.

Replacing separately saves costs

Damaged coils can be replaced individually; there is no need to replace the entire contactor group.

Kenxin Motor Inventory Assistance

Authorized agents assist in confirming inventory and recommending alternative models.

project	Specification
model	3RT1945-5AG21
Product Type	Contactor operating coil
Rated voltage	AC 110V
Rated frequency	50/60 Hz
Wiring method	Screw terminals
net weight	0.160 kg
Applicable product series	SIRIUS 3RT10 Large Contactor
Applicable models	3RT1045 (S3 size)
Original brand	Siemens
Product Status	The original manufacturer has listed it as obsolete; we recommend inquiring about alternative solutions.

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3RT1945-5AC21

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