Company lists · Data refreshed September 2026

Top 25 Transformer manufacturers based in Spain

Name: Transformer manufacturers based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 93 companies tracked

RevenueBase identified 93 transformer manufacturers headquartered in Spain as of September 2026 and tracks 2,346 professional contacts across them, including 482 with verified work emails. Madrid is the largest hub.

This list covers transformer manufacturers headquartered in Spain, 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 19, 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 19, 2026 86% judged on-target in blind review

93Companies

2,346Contacts tracked

482Verified emails

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The 25 largest transformer manufacturers based in Spain

Ranked by team size

Top 25 of 93 transformer manufacturers based in Spain, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Arteche	Partial evidence	Mungia, SpainHQ checked Sep 19, 2026	1,001-5,000	993 contacts →
	Partial evidence “The Arteche Group, with 75 years of experience in the electric power industry, offers high-tech solutions and equipment, with a complete range of instrument transformers…” Source: RevenueBase Database · checked Sep 19, 2026
2	CEN Solutions	Indirect evidence	Dos Hermanas, SpainHQ checked Sep 19, 2026	201-500	121 contacts →
	Indirect evidence “CEN Solutions specializes in the design, development, and implementation of electrical equipment and turnkey solutions for the energy, petrochemical, industrial, aerospace, and…” Source: RevenueBase Database · checked Sep 19, 2026
3	Premium PSU	Indirect evidence	Hospitalet De Llobregat, SpainHQ checked Sep 19, 2026	51-200	118 contacts →
	Indirect evidence “At Premium PSU, we specialize in the design and manufacturing of power conversion systems.” Source: RevenueBase Database · checked Sep 19, 2026
4	Zigor Corporation S.A	Indirect evidence	Vitoria-gasteiz, SpainHQ checked Sep 19, 2026	51-200	95 contacts →
	Indirect evidence “igor entered the market in 1998 as a technology company in the power electronics sector with a ground-breaking vision with respect to the traditional framework of the industry…” Source: RevenueBase Database · checked Sep 19, 2026
5	Faramax	Strong evidence	Palazuelo-empalme, SpainHQ checked Sep 19, 2026	501-1,000	83 contacts →
	Strong evidence “FARAMAX is a manufacturer of high voltage power transformers, shunt reactors and magnetically controlled shunt reactors (MCSR).” Source: RevenueBase Database · checked Sep 19, 2026
6	Inael Electrical Systems	Partial evidence	Toledo., SpainHQ checked Sep 19, 2026	51-200	56 contacts →
	Partial evidence “Over 45 years endorse us in the Power Sector with advanced solutions in the manufacture and distribution of electrical equipment for medium and high voltage.” Source: RevenueBase Database · checked Sep 19, 2026
7	Gave Electro	Indirect evidence	Llinars Del Vallés, SpainHQ checked Sep 19, 2026	51-200	46 contacts →
	Indirect evidence “Gave Electro offers more than 75 years of experience on low voltage electrical equipment design and manufacturing.” Source: RevenueBase Database · checked Sep 19, 2026
8	Iberapa Iberica DE Aparellajes	Strong evidence	Masamagrell, SpainHQ checked Sep 19, 2026	51-200	46 contacts →
	Strong evidence “Iberapa manufacturer of high voltage electrical control and protection equipment: distribution overhead lines, AT MT substations, secondary transformer stations, wind farms…” Source: RevenueBase Database · checked Sep 19, 2026
9	Imefy S.L	Partial evidence	Los Yebenes, SpainHQ checked Sep 19, 2026	51-200	42 contacts →
	Partial evidence “Desde que en 1973 IMEFY inició la fabricación transformadores de distribución en líquidos dieléctricos (aceite y silicona) y posteriormente en resina epoxi, ha mantenido un…” Source: RevenueBase Database · checked Sep 19, 2026
10	DF Electric	Partial evidence	Cornellà De Llobregat, SpainHQ checked Sep 19, 2026	51-200	31 contacts →
	Partial evidence “DF Electric is a company specialized in the manufacturing of fuses (Cylindrical & NH), fuse-holders and control transformers since 1980.” Source: RevenueBase Database · checked Sep 19, 2026
11	Polylux, S.L	Partial evidence	Barcelona, SpainHQ checked Sep 19, 2026	51-200	28 contacts →
	Partial evidence “POLYLUX is a spanish company with over 50 years of experience in the manufacture of products for the voltage conversion, safety and quality of electrical energy.” Source: RevenueBase Database · checked Sep 19, 2026
12	S.A. DE Construcciones Industriales - Saci	Indirect evidence	Alcobendas, SpainHQ checked Sep 19, 2026	51-200	24 contacts →
	Indirect evidence “SACI (Sociedad Anónima de Construcciones Industriales) es una de las principales Empresas Europeas centradas en el diseño, fabricación y comercialización de equipos orientados al…” Source: RevenueBase Database · checked Sep 19, 2026
13	Elinser Electromechanical Solutions	Partial evidence	Alcalá De Guadaira, SpainHQ checked Sep 19, 2026	51-200	21 contacts →
	Partial evidence “Elinser is an innovator company on the energy sector, dedicated to the integral maintenance and service of transformers and the management of the integral projects, in high and…” Source: RevenueBase Database · checked Sep 19, 2026
14	RS Isolsec S.L.U	Strong evidence	Montornés Del Vallés, SpainHQ checked Sep 19, 2026	11-50	18 contacts →
	Strong evidence “Specialists in tailor-made instrument transformers since 1954, RS ISOLSEC offer an extensive product range: manufacture and supply of instrument transformers, current transformers…” Source: RevenueBase Database · checked Sep 19, 2026
15	Krilinex Power Solutions	Indirect evidence	Bilbao, SpainHQ checked Sep 19, 2026	11-50	17 contacts →
	Indirect evidence “You are Power.” Source: RevenueBase Database · checked Sep 19, 2026
16	Fammsa Fabricaciones Metálicas Moreno, S.A	Indirect evidence	Los Yébenes, SpainHQ checked Sep 19, 2026	51-200	14 contacts →
	Indirect evidence “FAMMSA (Fabricaciones Metálicas Moreno, S.A) Empresa dedicada desde 1979 a la fabricación, diseño y cálculo de apoyos metálicos de celosía para líneas eléctricas de…” Source: RevenueBase Database · checked Sep 19, 2026
17	Jesiva Transformers S.L	Partial evidence	Vilamarxant, SpainHQ checked Sep 19, 2026	51-200	11 contacts →
	Partial evidence “Desde la fundación de JESIVA en el año 1971, nos hemos especializado en la fabricación de todo tipo de transformadores e inductivos.” Source: RevenueBase Database · checked Sep 19, 2026
18	Novoa Technologies	Indirect evidence	A Coruña, SpainHQ checked Sep 19, 2026	201-500	10 contacts →
	Indirect evidence “En Novoa Technologies, somos fabricantes especializados en equipos de media tensión, baja tensión y equipos de respaldo de energía, desarrollando soluciones que garantizan un…” Source: RevenueBase Database · checked Sep 19, 2026
19	Laboratorio Electrotécnico	Strong evidence	Cornellà De Llobregat, SpainHQ checked Sep 19, 2026	11-50	8 contacts →
	Strong evidence “Laboratorio Electrotécnico, is a company specialized in the manufacture of medium voltage transformers, switches, transformation centers for railway lines.” Source: RevenueBase Database · checked Sep 19, 2026
20	Suesa Subconjuntos Electrónicos, S.A	Partial evidence	Zamudio, SpainHQ checked Sep 19, 2026	51-200	8 contacts →
	Partial evidence “Fabricante de transformadores, bobinas y subconjuntos eléctricos y electrónicos” Source: RevenueBase Database · checked Sep 19, 2026
21	Coapsa Control SL	Indirect evidence	Viladecaballs, SpainHQ checked Sep 19, 2026	11-50	8 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
22	Comtrafo	Indirect evidence	Molins De Rei, SpainHQ checked Sep 19, 2026	11-50	7 contacts →
	Indirect evidence “COMTRAFO provides solutions for a large range of inductive performance products mainly in the field of Power Electronics.” Source: RevenueBase Database · checked Sep 19, 2026
23	Lighting Technologies TRQ	Partial evidence	Vinaroz, SpainHQ checked Sep 19, 2026	11-50	7 contacts →
	Partial evidence “Fundada en 1972 comenzó con la fabricación y distribución de transformadores, alimentadores y productos electrónicos.” Source: RevenueBase Database · checked Sep 19, 2026
24	Apyasa Electrical Insulation	Partial evidence	Bedia, SpainHQ checked Sep 19, 2026	11-50	7 contacts →
	Partial evidence “Apyasa is a company specialized in the manufacturing and machining of all types of insulation materials for the electric sector, mainly for the transformers, generators, and motor…” Source: RevenueBase Database · checked Sep 19, 2026
25	Pasero	Indirect evidence	Coslada, SpainHQ checked Sep 19, 2026	11-50	4 contacts →
	Indirect evidence “PASERO es una empresa referente en los servicios industriales dirigidos al sector de la distribución eléctrica.” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: transformer manufacturers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names transformer manufacturers.
Partial evidence: Its own public description names part of transformer manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name transformer manufacturers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 93 transformer manufacturers based in Spain

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Transformer manufacturers based in Spain at a glance

As of Sep 19, 2026

20.5%Verified-email coverage

25.2Average contacts per company

11-50Median size (employees)

6.5%Largest-city concentration · Madrid

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Spain, so it is reported there. Company counts and contact totals on this page are exact for Spain, over 93 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 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 Spain whose own description of what they do matches “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 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 transformer manufacturers, and records with no verified work email. Companies headquartered outside Spain 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, 482 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 19, 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 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 transformer manufacturers are there based in Spain?

RevenueBase identified 93 transformer manufacturers headquartered in Spain 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?

Arteche, headquartered in Mungia, tops this list with the largest team on record.

Which city has the most transformer manufacturers?

Madrid leads with 6 headquartered companies, followed by Sevilla (4) and Barcelona (3).

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 482 verified decision-maker contacts tracked across these 93 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 19, 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.