Company lists · Data refreshed September 2026

Top 16 Switching transformer manufacturers based in France

RevenueBase identified 26 switching transformer manufacturers headquartered in France as of September 2026 and tracks 460 professional contacts across them, including 186 with verified work emails. Claix is the largest hub.

This list covers switching transformer manufacturers headquartered in France, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 30, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 30, 2026 86% judged on-target in blind review
26Companies
460Contacts tracked
186Verified emails
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The 16 largest switching transformer manufacturers based in France

Ranked by team size
Top 16 of 26 switching transformer manufacturers based in France, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to switching transformer manufacturers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceCahors, FranceHQ checked Sep 30, 20261,001-5,000164 contacts →

Indirect evidence

“At Green Transfo SAS, we are dedicated to providing our customers with the highest level of satisfaction through our commitment to quality products and exceptional service.”

Source: RevenueBase Database · checked Sep 30, 2026
2Partial evidenceSt Etienne, FranceHQ checked Sep 30, 202611-5025 contacts →

Partial evidence

“VARIVOLT is an on-load stepless variable voltage transformer (0–20 MVA), used in the glass, steel, chemical industries, and test platforms.”

Source: RevenueBase Database · checked Sep 30, 2026
3Partial evidenceSaint Michel De Boulogne, FranceHQ checked Sep 30, 202651-20024 contacts →

Partial evidence

“The Cefem Group has been developing and manufacturing products since 1987 around 3 Business Units: Cefem Power: Power electronics, through the design and manufacture of…”

Source: RevenueBase Database · checked Sep 30, 2026
4Strong evidenceBussy-saint-georges, FranceHQ checked Sep 30, 2026201-50024 contacts →

Strong evidence

“Myrra design and manufacture high-quality transformers and inductors for industrial use.”

Source: RevenueBase Database · checked Sep 30, 2026
5Partial evidenceCourrières, FranceHQ checked Sep 30, 202611-5022 contacts →

Partial evidence

“Depuis 1954, Securelec Socem conçoit et fabrique des transformateurs et équipements électriques, du standard au sur-mesure.”

Source: RevenueBase Database · checked Sep 30, 2026
6Partial evidence77330, FranceHQ checked Sep 30, 202611-5017 contacts →

Partial evidence

“Située en Ile de France, proche de Marne La Vallée, la société Le Cosinus se veut LE spécialiste de la conception et de la fabrication de transformateurs (Mono ou Triphasé) et…”

Source: RevenueBase Database · checked Sep 30, 2026
7Partial evidenceCepoy, FranceHQ checked Sep 30, 202651-20014 contacts →

Partial evidence

“Spécialiste des transformateurs de mesure depuis 1954, RS ISOLSEC offre une large gamme de transformateurs de courant, transformateurs de tension, transformateurs de protection…”

Source: RevenueBase Database · checked Sep 30, 2026
8Partial evidenceClaix, FranceHQ checked Sep 30, 202611-5013 contacts →

Partial evidence

“Nous vous proposons une offre complémentaire en transformateurs et inductances basse et moyenne tension.”

Source: RevenueBase Database · checked Sep 30, 2026
9Strong evidenceEpone, FranceHQ checked Sep 30, 202611-5013 contacts →

Strong evidence

“Building on French know-how in the end-to-end manufacture of transformers, Soudax has been carving out a place in the precision industry since 1973 to meet the requirements of…”

Source: RevenueBase Database · checked Sep 30, 2026
10Indirect evidenceParigné-l’évêque, FranceHQ checked Sep 30, 202611-5011 contacts →

Indirect evidence

“Recognised specialist in the design and manufacturing of winding products and customised systems, Circé offers you a wide range of single-phase, three-phase, three-to-single-phase…”

Source: RevenueBase Database · checked Sep 30, 2026
11Strong evidenceLandes, FranceHQ checked Sep 30, 202611-508 contacts →

Strong evidence

“ISO9001:2015 Manufacturer of Custom Transformers & Coils for PCB from 1W to 3KW.”

Source: RevenueBase Database · checked Sep 30, 2026
12Indirect evidenceLyon, FranceHQ checked Sep 30, 202611-508 contacts →

Indirect evidence

“SANERGRID® is part of @Groupe SANERGRID, the @SANERGRID activity focuse its expertise in the design, engineering, and manufacturing of solutions for environmental protection…”

Source: RevenueBase Database · checked Sep 30, 2026
13Indirect evidenceClermont Ferrand, FranceHQ checked Sep 30, 202611-508 contacts →

Indirect evidence

“Transfos MARY est une PME française basée à Clermont-Ferrand en Auvergne depuis 1949, filiale du groupe industriel familial LUVICA installé à Montluçon.”

Source: RevenueBase Database · checked Sep 30, 2026
14Partial evidenceLoches, FranceHQ checked Sep 30, 202611-504 contacts →

Partial evidence

“MEROT-SODEX conçoit et fabrique des transformateurs électriques selon vos spécifications depuis 1920.”

Source: RevenueBase Database · checked Sep 30, 2026
15Indirect evidenceLe Grand Quevilly, FranceHQ checked Sep 30, 20261-102 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 30, 2026
16Indirect evidenceGargenville, FranceHQ checked Sep 30, 20261-101 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 30, 2026

Showing 16 of 26 switching transformer manufacturers based in France

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Switching transformer manufacturers based in France at a glance

As of Sep 30, 2026
40.4%Verified-email coverage
17.7Average contacts per company
11-50Median size (employees)
7.7%Largest-city concentration · Claix
Sep 30, 2026Page data refreshed

Companies by employee count

1-10
3
11-50
16
51-200
3
201-500
1
1,001-5,000
2

Email recency for this list is measured worldwide rather than for France, so it is reported there. Company counts and contact totals on this page are exact for France, over 26 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among switching transformer manufacturers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in France whose own description of what they do matches “switching transformer manufacturers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names switching transformer manufacturers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among switching transformer manufacturers, and records with no verified work email. Companies headquartered outside France are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every listed company carries at least one verified work email, 186 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 30, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names switching transformer manufacturers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many switching transformer manufacturers are there based in France?

RevenueBase identified 26 switching transformer manufacturers headquartered in France as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Green Transfo SAS, headquartered in Cahors, tops this list with the largest team on record.

Which city has the most switching transformer manufacturers?

Claix leads with 2 headquartered companies, followed by Paris (2) and Bussy-Saint-Georges (1).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 186 verified decision-maker contacts tracked across these 26 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 30, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.