3RT1945-5AL21

The Siemens 3RT1945-5AL21 is a dedicated operating coil for the 3RT1045 (S3 size) large contactor, rated at AC 230V, 50/60Hz. The coil can be replaced individually to extend the contactor's lifespan without replacing the entire unit. Kenxin Motor provides genuine original products and stock availability.

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Siemens 3RT1945-5AL21 coil, 230V AC, for use with 3RT1045 S3 contactor.

Product Positioning

The 3RT1945-5AL21 is the operating coil of the Siemens SIRIUS large 3RT10 series contactor. It has a rated voltage of AC 230V and a frequency range of 50/60Hz, and is specifically designed for the 3RT1045 (S3 size, AC-3 37kW/400V) model. When the contactor coil ages or burns out, this coil can be replaced directly without replacing the entire contactor mechanism, saving maintenance costs and time. Kenxin Motor provides genuine original products and in-stock sourcing services.

Core Product Advantages and Features

AC 230V specification

Rated voltage 230V, frequency 50/60Hz, suitable for most field power distribution environments in Taiwan.

Original factory compatible models

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

Replacing separately saves costs

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

Easy to install

Screw terminal connections allow for quick on-site replacement.

Kenxin Motors guarantees genuine products

Authorized Siemens distributor, providing genuine Siemens products and technical consultation.

project	Specification
model	3RT1945-5AL21
Product Type	Contactor operating coil
Rated voltage	AC 230V
Rated frequency	50/60 Hz
Wiring method	Screw terminals
Applicable product series	SIRIUS 3RT10 Large Contactor
Applicable models	3RT1045 (S3 size)
Original brand	Siemens

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3RT1945-5AC21

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