Drive Technology

Low voltage motors with Super Premium Efficiency IE4

Does it make sense to invest in IE4 motors? What are the advantages of IE4? When will the high efficiency payoff?

An efficient product range!
Does it even exist? A seamless and integrated portfolio with IE4 efficiency, no change in the shaft height, with various enclosure versions in a well-proven design? Siemens IE4 motors are reliable and rugged in operation with low operating costs. And the best? A low energy consumption reduces the stress on the environment as a result of low CO2 emissions.

Innovative IE4 motors to help lead you to success
Higher energy savings, lower operating costs and long-term security for the future – with IE4 low voltage motors from Siemens, you are clearly investing to boost your competitiveness. IE4 means, for example, up to 14 % higher energy savings when compared to IE1. This pays off, especially if you consider that the energy costs for many motors exceeds the initial purchase price after just six months in operation.

Minimum operating costs over the complete lifecycle
Does it make sense to invest in a high efficiency? This question is becoming increasingly more important when planning new plants and systems as well as for retrofit projects. Energy Efficiency Tools such as SinaSave and the app SIMOTICS EE-COMPARATOR answer this question. Once a decision has been made for IE4, then this results in low operating costs over the complete service life.

A future-proof concept
Why are IE4 motors sustainable? Just like the complete 1LE1 platform, they are available in General Purpose (aluminum enclosure) and Severe Duty (cast iron enclosure) versions and without any change in the shaft height from IE1 up to IE4. IE4 is therefore the consequential extension of the 1LE1 platform to include Super Premium Efficiency. The motors are designed for line operation, but they can also be operated with frequency converters. This takes independence and flexibility to the planning of plants and retrofit.

Highest efficiency without any compromises
Why make a compromise when there is a simple solution? IE4 motors are designed for line operation (DOL). Here, they fully leverage their benefits: well-proven handling, known technology and flexibility based on a comprehensive range. When moving up from IE1 up to IE4 the efficiency can be up to 14 % higher and from IE3 up to IE4, up to 3 %.
You can find more information about minimum efficiencies in Europe: Efficiency Standards for IEC Line Motors

Benefits and applications



Especially light for use in general ambient conditions

Especially rugged for use in aggressive ambient conditions

Application examples: pumps, fans, compressors

Application examples: mixers, mills, conveyors, pumps, fans, compressors

Same shaft height-power allocation as IE1, IE2 and IE3

Up to 3 % higher efficiency than IE3

Future proof and flexible in planning as they can be also fed from frequency converters

More information about SIMOTICS GP

More information about SIMOTICS SD

  • media title1

    Highest efficiency in a lightweight enclosure – SIMOTICS GP in IE4

  • media title2

    Rugged and the highest efficiency – SIMOTICS SD in IE4

  • media title3

    Efficiency classes IE1 to IE4 according to IEC 60034-30-1

Technical data

1LE10 series

1LE15/6 series

Frame Size:

100L - 160L

100L - 315L

Frequency, power range

50 Hz: 2.2 kW - 15 kW
60 Hz: 2.55 kW - 17.3 kW

50 Hz: 2.2 kW - 200 kW
60 Hz: 2.55 kW - 230 kW

Enclosure and terminal box:


Cast iron

Fan cover:

Plastic or sheet steel

Rating plate:

Rating plate sticker or aluminum (stainless steel optional)

Types of construction:

All usual types of construction

Efficiency class:

IE4 (Super Premium Efficiency)

No. of poles:

2, 4  (6 and 8 on request)


Line operation: 230 V up to 690 V
Frequency converter operation: SH 100 - 160 up to 460 V
and SH 180 - 315 up to 500 V


CE (UL, CSA, CEL in preparation)

Degree of protection:

IP55 (IP65 / IP56 optional)

Temperature class:

155(F) to 130(B)