+33 (0) 970 820 163
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Transfos MARY
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Transfos MARY devices,
manufactures and markets for you
a wide range of electrotechnical
transformers and products meeting
your needs. Transfos MARY guarantees
you dedicated service, technical advice
and quality production to perfectly
meet the needs of your projects.
Located in France, Transfos MARY is
specialized in design and manucfacture
of dry elctrical transformers
(< 1 000 V, de 40 à 630 000 VA).


Transfos MARY, it is a full range
of standard and specific
single and three phase products

  • Transformers
  • Autotransformers
  • Voltage dividers
  • Voltage stabilizers
  • Variable autotransformers
  • Inductors
  • DC-power supplies filtered
  • Switch mode power supplies
  • Special windings


Newest Transfos MARY catalogue

The 70th anniversary edition of the Transfos MARY catalogue is available here.


Transfos MARY celebrates its 70 years 

Throughout its 70 years of history, Transfos MARY has been developing its know-how which was adapted to both the inquiries of its customers and the different market changes.

Knowing that we are an invisible but absolutely necessary part of all human activities, from feeding and protecting machine tools, to ensuring the electrical safety of operating blocks, or supplying energy to tertiary infrastructures, we have continually modernized and adapted our processes in order to offer the best products with the shortest delivery times.

Our ambitions are to serve the needs of our domestic and international customers with both maximum quality and responsiveness.

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Reliability & longevity  

Transfos Mary manufactures highly reliable and long-lasting transformers. Only the terminal blocks of these two transformers produced in1983 and 1987 had to be replaced recently to get back to an optimal operation.


Energy savings  

Energy challenges to come are gigantic. Well to choose its transformers becomes major to insure earnings of consumption, decrease of the thermal wastes and the smooth running, with high level of efficiency and lifetime. Transformers MARY proposes you a complete range of transformers recognized for their performances and their reliability answering the most demanding specifications.

TRANSFOSMARY - 30 rue Louis Blériot - ZI Brézet - 63017 Clermont Ferrand Cedex 2 - Tél. : +33 (0) 970 820 163 - Fax : +33 (0) 4 73 15 50 09
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Transfos MARY is specialized in design and manufacturing of low-voltage dry electric transformers (40 - 630 000 VA< 1 000 volt).
Single-phase and three-phase transformers: Separation and safety, Multi-tensions, Isolation, Circuit Separation for medical use, Energy saving, Dry-type, etc.
Single-phase and three-phase autotransformers: Standards, Variables, Motor start up, Voltage dividers, Voltage stabilizers, etc.
Single-phase and three-phase power supplies: Switch mode, filtered
Single-phase and three-phaseinductors: Direct current, Alternating current