Company lists · Data refreshed September 2026

Top 23 Voltage transformer manufacturers based in Brazil

Name: Voltage transformer manufacturers based in Brazil
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 131 companies tracked

RevenueBase identified 131 voltage transformer manufacturers headquartered in Brazil as of September 2026 and tracks 2,628 professional contacts across them, including 279 with verified work emails. Sao Paulo is the largest hub.

This list covers voltage transformer manufacturers headquartered in Brazil, 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

131Companies

2,628Contacts tracked

279Verified emails

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The 23 largest voltage transformer manufacturers based in Brazil

Ranked by team size

Top 23 of 131 voltage transformer manufacturers based in Brazil, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to voltage 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	Itaipu Transformadores	Partial evidence	Itápolis, BrazilHQ checked Sep 30, 2026	1,001-5,000	350 contacts →
	Partial evidence “Com mais de 50 anos de história, a Itaipu Transformadores é uma das principais referências na fabricação de transformadores de potência no Brasil e no exterior.” Source: RevenueBase Database · checked Sep 30, 2026
2	Trael Transformadores Elétricos Ltda	Partial evidence	Cuiabá, BrazilHQ checked Sep 30, 2026	1,001-5,000	230 contacts →
	Partial evidence “A TRAEL iniciou suas atividades em 1992 com a fabricação de transformadores de distribuição, força e especiais.” Source: RevenueBase Database · checked Sep 30, 2026
3	TDM Service & Solutions	Indirect evidence	Bragança Paulista, BrazilHQ checked Sep 30, 2026	201-500	218 contacts →
	Indirect evidence “We have been in the market for over 20 years serving the main industrial and commercial markets, gaining prominent positions in the segments of Engineering, Commissioning of…” Source: RevenueBase Database · checked Sep 30, 2026
4	ITAM	Partial evidence	Manaus, BrazilHQ checked Sep 30, 2026	201-500	209 contacts →
	Partial evidence “A Indústria de Transformadores Amazonas Ltda, ITAM, é uma empresa do segmento de energia elétrica, especializada na produção de transformadores de diversas classes e potências…” Source: RevenueBase Database · checked Sep 30, 2026
5	Balteau Produtos Elétricos Ltda - Grupo WEG	Strong evidence	Itajubá, BrazilHQ checked Sep 30, 2026	201-500	206 contacts →
	Strong evidence “Balteau Produtos Elétricos LTDA is a traditional manufacturer of Instrument Transformers and Metering Device Set in Itajubá-MG, Brazil.” Source: RevenueBase Database · checked Sep 30, 2026
6	Isolet	Indirect evidence	Itu, BrazilHQ checked Sep 30, 2026	201-500	134 contacts →
	Indirect evidence “ISOLET is a company based out of Rod.” Source: RevenueBase Database · checked Sep 30, 2026
7	Comtrafo	Partial evidence	Cornelio Procopio, BrazilHQ checked Sep 30, 2026	501-1,000	119 contacts →
	Partial evidence “A COMTRAFO atua desde 1994 produzindo transformadores de distribuição e força para o mercado nacional e internacional.” Source: RevenueBase Database · checked Sep 30, 2026
8	Ctrltech Conversão DE Energia	Indirect evidence	Osasco, BrazilHQ checked Sep 30, 2026	51-200	94 contacts →
	Indirect evidence “A CTRLTECH está em atividade desde se dedicando à fabricação de equipamentos elétricos e eletromecânicos de conversão de energia para diversos segmentos.” Source: RevenueBase Database · checked Sep 30, 2026
9	Brasformer Braspel	Partial evidence	Sao Paulo, BrazilHQ checked Sep 30, 2026	51-200	42 contacts →
	Partial evidence “Empresa brasileira com 37 anos e especializada em transformadores de Potencial e de Corrente a seco em epoxi de 0,6 kV a 36,2kV, aplicados em medição e proteção de sistemas…” Source: RevenueBase Database · checked Sep 30, 2026
10	Transformadores Jundiaí	Partial evidence	Jundiaí, BrazilHQ checked Sep 30, 2026	51-200	31 contacts →
	Partial evidence “A "Transformadores Jundiaí – Soluções em Energia" se consolida, desde 1990, no mercado regional e nacional como referência no segmento elétrico, sempre seguindo o compromisso de…” Source: RevenueBase Database · checked Sep 30, 2026
11	Trafocare Ltda	Partial evidence	Campinas, BrazilHQ checked Sep 30, 2026	11-50	26 contacts →
	Partial evidence “A Trafocare é uma empresa especializada na manutenção de transformadores e comércio de fluidos isolantes elétricos, investindo no que há de mais moderno e eficiente no mercado…” Source: RevenueBase Database · checked Sep 30, 2026
12	DAX Energy Equipamentos E Sistemas	Partial evidence	Mandirituba, BrazilHQ checked Sep 30, 2026	51-200	20 contacts →
	Partial evidence “Fundada em 2015, a partir da união de profissionais com mais de 30 anos de experiência no mercado de energia e na fabricação de equipamentos eletromecânicos voltados para…” Source: RevenueBase Database · checked Sep 30, 2026
13	Entran	Indirect evidence	Pinhais, BrazilHQ checked Sep 30, 2026	11-50	15 contacts →
	Indirect evidence “A Entran Indústria de Equipamentos foi fundada em 1988 na cidade de Curitiba, Paraná.” Source: RevenueBase Database · checked Sep 30, 2026
14	Adftronik Indústria	Partial evidence	Blumenau, BrazilHQ checked Sep 30, 2026	11-50	10 contacts →
	Partial evidence “Com dezesseis anos de mercado a Adftronik atua na fabricação de estabilizadores de tensão monofásicos e trifásicos de até 150Kva, no break`s, transformadores monofásicos e…” Source: RevenueBase Database · checked Sep 30, 2026
15	Nova Trafo Consultoria Transformadores DE Potência	Partial evidence	Guarulhos, BrazilHQ checked Sep 30, 2026	1-10	9 contacts →
	Partial evidence “A Nova Trafo é uma empresa que atua no segmento de Transformadores e Reatores, e oferece serviços de Diagnóstico, Treinamentos, Diligenciamento, Engenharia de Aplicação e Gestão…” Source: RevenueBase Database · checked Sep 30, 2026
16	Riotrafo	Strong evidence	São José Do Rio Pardo, BrazilHQ checked Sep 30, 2026	51-200	7 contacts →
	Strong evidence “Founded in 1995, Riotrafo has been providing innovative solutions in the Electricity Distribution transformers segment in voltage class 15 kV, 25kV and 36,2 kV.” Source: RevenueBase Database · checked Sep 30, 2026
17	Montrafo Servicos EM Transformadores	Indirect evidence	Pinhais, BrazilHQ checked Sep 30, 2026	51-200	6 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026
18	Nexsia Soluções	Strong evidence	Birigui, BrazilHQ checked Sep 30, 2026	1-10	4 contacts →
	Strong evidence “We specialize in the operation, maintenance, and overhaul of electrical equipment, with a focus on voltage regulators and transformers.” Source: RevenueBase Database · checked Sep 30, 2026
19	Bralux Transformadores	Partial evidence	Mogi Mirim, BrazilHQ checked Sep 30, 2026	11-50	4 contacts →
	Partial evidence “A Bralux Transformadores é especializada na venda, reforma e locação de transformadores e equipamentos elétricos para subestações.” Source: RevenueBase Database · checked Sep 30, 2026
20	SKY Montagem E Manutencao Industrial E Comercio DE Pecas	Indirect evidence	Lauro De Freitas, BrazilHQ checked Sep 30, 2026	51-200	4 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026
21	Trafo Manutenção	Partial evidence	Jundiai, BrazilHQ checked Sep 30, 2026	1-10	3 contacts →
	Partial evidence “A TRAFO MANUTENÇÃO é uma empresa de prestação de serviços focada em manutenções preventivas e corretivas, montagem e comissionamentos de transformadores de distribuição e de…” Source: RevenueBase Database · checked Sep 30, 2026
22	Trinse	Partial evidence	Blumenau, BrazilHQ checked Sep 30, 2026	1-10	2 contacts →
	Partial evidence “Consultoria e Serviços de Engenharia para Cálculo e Projeto de Transformadores e Reatores e nos fenômenos envolvidos na operação destes equipamentos no Sistema Elétrico Nacional.” Source: RevenueBase Database · checked Sep 30, 2026
23	LPENG	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 30, 2026	51-200	1 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 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: voltage 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 voltage transformer manufacturers.
Partial evidence: Its own public description names part of voltage transformer manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name voltage 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 23 of 131 voltage transformer manufacturers based in Brazil

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Voltage transformer manufacturers based in Brazil at a glance

As of Sep 30, 2026

10.6%Verified-email coverage

20.1Average contacts per company

11-50Median size (employees)

13.7%Largest-city concentration · Sao Paulo

Sep 30, 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 Brazil, so it is reported there. Company counts and contact totals on this page are exact for Brazil, over 131 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 voltage 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 Brazil whose own description of what they do matches “voltage 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 voltage 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 voltage transformer manufacturers, and records with no verified work email. Companies headquartered outside Brazil 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, 279 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 voltage 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 voltage transformer manufacturers are there based in Brazil?

RevenueBase identified 131 voltage transformer manufacturers headquartered in Brazil 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?

Itaipu Transformadores, headquartered in Itapolis, tops this list with the largest team on record.

Which city has the most voltage transformer manufacturers?

Sao Paulo leads with 18 headquartered companies, followed by Jundiai (7) and Blumenau (4).

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 279 verified decision-maker contacts tracked across these 131 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.