Technical register for agricultural, construction and commercial machinery · sourced data
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Leroy Somer LS112MT

Series: Other models

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The Leroy Somer LS112MT is a three-phase induction motor from the Leroy Somer range. The rated output is 4 kW. The motor is two-pole, which at 50 Hz gives a synchronous speed of 3,000 rpm. The housing is frame size 112. The protection class is IP55. The efficiency is 85.8 per cent at full load, 85.5 per cent at 75 per cent load and 83 per cent at half load. Mounting arrangements to IEC 60034-7: B3, B5, B35, B14 and B34. The motor is built in France. The values are recorded in the Australian MEPS registration under standard AS/NZS 1359.5:2000 (Legacy); measured to IEC 60034-2-1 (Edition 2.0). Rated output across the Leroy Somer range ranges from 0.75 to 160 kW; the LS112MT sits at the bottom of that range with 4 kW. Its immediate neighbours are the LSES100LT below it with 3 kW and the AS132S-4 above it with 5.5 kW. 103 Leroy Somer models are on record.

Leroy-Somer – other models: the collective page of MEPS-registered three-phase motors outside the named ranges, frame sizes 80 to 315, 0.75 to 160 kW, manufactured in France and China

This page gathers the Leroy-Somer three-phase motors the Australian energy-efficiency register does not assign to a named range. Leroy-Somer is a French electric-motor manufacturer with roots in Angoulême/La Rochefoucauld, part of the Japanese Nidec group since 2018; the company is among the most established European suppliers of industrial motors and generators. The register designations follow two recognisable schemes: the AS code with frame size and pole count (e.g. AS100L-2) for the classic asynchronous-motor range, and FLSES with frame size (e.g. FLSES160L) for a newer energy-efficient range; the exact meaning of the FLSES letter sequence cannot be reliably reconstructed from the dump.

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The register lists here 103 versions with 0.75 to 160 kW, two- to four-pole, full-load efficiencies from 76.6 to 95.98% and at 75% load from 73.51 to 96.06%. All motors are built to protection rating IP55, frame sizes run from 80 to 315 under IEC. France is recorded as the manufacturing country for the larger share, China for the rest; testing followed chiefly the 2012 GEMS determinations, alongside the older 2000 Legacy standard and AS/NZS 1359.5:2004. None of the 103 motors is classified under the Australian High Efficiency Level. Mounting codes are dominated by the plain foot form B3, followed by combinations with B5, B34 and B35.

The page thus shows that Leroy-Somer manufactures its classic IEC standard-motor programme in parallel in France and under Chinese licensed production; in the industrial-motor market the company competes with ABB, Siemens and WEG, with particular strength in generators and variable-speed drives.

When buying used or replacing, what matters is bearing condition and a checked insulation resistance of the winding, visible overheating marks on the terminal box and fan cover, the condition of shaft and key, and a legible nameplate with frame size, pole count and efficiency class; for French-made units it is also worth checking the availability of genuine spares through the Nidec-Leroy-Somer network against Chinese-made equivalents.

Sources: SpecCodex register, model data: Leroy-Somer (weitere Modelle, MEPS-Registrierungen), Leroy-Somer (Nidec)

Technical data

Engine

Rated output4 kWcorrect

Electrical data

Rated voltage240/380/400/415 Vcorrect
Number of poles2correct
Protection classIP55correct
Frame size112correct
Mounting (IEC 60034-7)B3, B5, B35, B14, B34correct
Efficiency at full load85.8 %correct
Efficiency at 75 % load85.5 %correct
Efficiency at half load83 %correct

Origin and approval

Country of manufactureFrancecorrect

Other data

Standard appliedAS/NZS 1359.5:2000 (Legacy)correct
Test methodIEC 60034-2-1 (Edition 2.0)correct

Frequently asked questions

How much power does the Leroy Somer LS112MT have?

The Leroy Somer LS112MT delivers 4 kW.

What to check before buying

  • Match the data plate against the order: frame size, mounting and rating have to agree.
  • Check the ingress rating against the installation site — outdoors or in dust the demands differ.
  • Hold the mounting form and dimensions against the existing seat before ordering.
  • The pole count sets the speed — when replacing an older unit, compare this first.
  • For used units, ask about winding condition and bearing play.
  • Ask about parts availability for this series — the running costs hang on it.

A general list for this type of machine — no substitute for an inspection or an appraiser.

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This page carries 22 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.

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Sources: Energy Rating — Australian government equipment register (retrieved August 2026) · How we check the data

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