IE4 electric motors

IE4 electric motors from Hoyer are defined by high energy efficiency. This provides opportunities for large energy savings across markets and applications.

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Stainless steel name plate
3xPTC in windings
Locked bearing in drive end
C3L paint RAL 9005

Frame size



0.75-315 kW

IP class


Insulation class


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Technical information

Hoyer AC IE4 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 HMA4 (aluminium) size 80-180 and HMC4 (cast iron) size 160-355. All cast iron and aluminium motors are equipped with quality bearings and 3xPTC in windings. Motors in size 80-200 have closed bearings greased for life. All Hoyer IE4 motors have a locked bearing in the drive end as standard.

All IE4 motors are provided with blind caps in all supply connections and are IP55 as standard, prepared for drain holes and painted C3L according to ISO 12944-5:2018 in colour RAL 9005 low gloss.

230 VD / 400 VY – Hoyer IE4 motors ≤ 3 kW
400 VD / 690 VY – Hoyer IE4 motors ≥ 3 kW

Other voltages are supplied on request.

Energy efficiency and MEPS

Energy efficiency is a key focus area in relation to CO2 emissions and industrial pollution in general. Across borders, legislation is coming into force to improve the efficiency of electric motors - often called MEPS (Minimum Energy Performance Standards). European MEPS is related to the Ecodesign directive, and Hoyer IE4 naturally meets all future requirements.

From 1 July 2023, all electric motors between 75-200 kW that are put into service in land-based industrial applications within the EU/EEA must be IE4 or higher. At Hoyer Motors, we are ready to support you in your efforts to improve energy efficiency.

Download catalogue

Find out more about our energy efficient IE4 electric motors in our catalogue.


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Hoyer distributor network

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