IE3 electric motors

IE3 motors from Hoyer are recognised for proven high quality, reliability and performance. They are used for a wide variety of industrial, marine and wind applications.

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3xPTC in windings
Locked bearing in drive end
Colour RAL 9005 low gloss




0.75-1800 kW

IP class


Insulation class


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Technical information

Hoyer IE3 electric motors are manufactured according to the efficiency class system specified under IEC 60034-30. Their high quality, reliability and performance are well documented.

The motors are asynchronous, low voltage three-phase TEFC motors. Type HMA3 (aluminium) size 80-132 and HMC3 (cast iron) size 160-400 are supplied with SKF or similar premium bearings and 3xPTC in the windings. Motors in size 80-180 have closed bearings greased for life. All Hoyer IE3 motors have a locked bearing in the drive end as standard.

All IE3 motors are provided with blind caps in all supply connections and are IP55 as standard, prepared for drain holes and painted with RAL 9005 low gloss.

400 V Y – Hoyer IE3 motors ≤ 3 kW
400 V D – Hoyer IE4 motors ≥ 3 kW

Other voltages are supplied on request.

Download catalogue

Find out more about our IE3 electric motors in our catalogue.
If you have any questions, please feel free to contact us. Hoyer is always working to maximise your results.


Documentation is key. We have made it easy for you to hand-pick the documentation package you need. Go to our certificates section.

World Efficiency Motors

Did you know that Hoyer has developed a range of motors designed to meet different efficiency requirements across markets? The motors are based on our popular IE3 range.

We call them World Efficiency Motors.

As standard, Hoyer World Efficiency Motors are designed to IEC standard sizes and are UL/CSA approved. Likewise, Hoyer World Efficiency Motors are developed to meet the requirements of multiple efficiency class systems in one motor.

The range gives global OEMs many options when they need to optimize the supply chain and work with energy savings.

Have you considered IE4?

IE4 motors from Hoyer are defined by high energy efficiency, which offers great opportunities for energy savings.

Improving energy efficiency with frequency converters

Our stand-alone drives can be both centralised and decentralised solutions. They are used in a wide range of applications in all our segments. 

Hoyer distributor network

In close cooperation with our distributors, we offer the best possible after sales solutions. Find our distributor network here.