Company lists · Data refreshed October 2026

Top 25 Isolation transformers manufacturers based in the United States

Name: Isolation transformers manufacturers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 17, 2026 120 companies tracked

RevenueBase identified 120 company matches for isolation transformers manufacturers associated with the United States as of October 2026 and tracks 3,629 professional contacts across them, including 1,287 with verified work emails. Houston is the largest hub.

This list covers company matches for isolation transformers manufacturers associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Oct 17, 2026 How this list was built

120Companies

3,629Contacts tracked

1,287Verified emails

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The 25 largest isolation transformers manufacturers based in the United States

Ranked by team size

Top 25 of 120 company matches for isolation transformers manufacturers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 17, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Virginia Transformer Corp	Exact match	Roanoke, VA, United StatesHQ recorded Oct 17, 2026	5,001-10,000	859 contacts →
	Exact match “Virginia Transformer is an engineering company that manufactures transformers.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
2	HD Hyundai Power Transformers Usa, INC	Exact match	Montgomery, AL, United StatesHQ recorded Oct 17, 2026	201-500	209 contacts →
	Exact match “HD Hyundai Power Transformers USA, Inc, a subsidiary of HD Hyundai Electric Systems, stands as a premier transformer manufacturer located in Montgomery, Alabama.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
3	Pennsylvania Transformer Technology LLC PTT	Exact match	Canonsburg, PA, United StatesHQ recorded Oct 17, 2026	201-500	190 contacts →
	Exact match “Pennsylvania Transformer Technology LLC (PTT) is a US-owned, industry leading manufacturer of a wide range of sizes and types of power transformers for the investor-owned…” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
4	NWL	Exact match	Bordentown, NJ, United StatesHQ recorded Oct 17, 2026	201-500	180 contacts →
	Exact match “NWL Inc.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
5	Power Partners	Exact match	Athens, GA, United StatesHQ recorded Oct 17, 2026	1,001-5,000	172 contacts →
	Exact match “Power Partners is a leading manufacturer of distribution transformers in North America.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
6	JST Power Equipment	Exact match	Lake Mary, FL, United StatesHQ recorded Oct 17, 2026	201-500	149 contacts →
	Exact match “At JST Power Equipment, we pride ourselves on delivering world-class transformer and electrical equipment solutions.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
7	MGM Transformers	Exact match	Vernon, CA, United StatesHQ recorded Oct 17, 2026	201-500	128 contacts →
	Exact match “MGM Transformers is now part of Forgent Power Solutions.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
8	Roman Manufacturing	Exact match	Grand Rapids, MI, United StatesHQ recorded Oct 17, 2026	201-500	100 contacts →
	Exact match “RoMan Manufacturing was founded in 1980 in Grand Rapids, Michigan, and specializes in small, lightweight Water-Cooled AC Transformers, DC Power Supplies, MFDC (Medium-Frequency)…” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
9	Vantran Transformers	Exact match	Waco, TX, United StatesHQ recorded Oct 17, 2026	51-200	85 contacts →
	Exact match “VanTran Transformers is now part of Forgent Power Solutions.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
10	Olsun Electrics Corporation	Exact match	Richmond, IL, United StatesHQ recorded Oct 17, 2026	51-200	52 contacts →
	Exact match “75 Years of Engineering Excellence in the Delivered Worldwide Olsun Electrics is the industry’s most trusted partner for custom dry-type transformers.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
11	Meta Power Solutions	Exact match	Lake Park, FL, United StatesHQ recorded Oct 17, 2026	51-200	47 contacts →
	Exact match “We collaborate with customers to deliver cost-effective, well-developed commercial transformer and industrial transformer solutions that meet unique specifications.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
12	SNC An Allient Power Company	Exact match	Oshkosh, WI, United StatesHQ recorded Oct 17, 2026	51-200	46 contacts →
	Exact match “SNC Manufacturing Co, Inc.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
13	Neeltran INC	Exact match	New Milford, CT, United StatesHQ recorded Oct 17, 2026	51-200	42 contacts →
	Exact match “Founded in 1973, Neeltran is uniquely positioned as one of the few companies in the world that designs and manufactures its own rectifier-transformers and rectifiers in the same…” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
14	Hitran Corporation	Exact match	Flemington, NJ, United StatesHQ recorded Oct 17, 2026	51-200	37 contacts →
	Exact match “At Hitran, we have been delivering custom magnetic transformers and inductors to clients worldwide for over 55 years.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
15	Vanguard Electronics	Exact match	Huntington Beach, CA, United StatesHQ recorded Oct 17, 2026	201-500	33 contacts →
	Exact match “Vanguard Electronics has been an industry leader for over 60 years in the design and manufacture of inductors and transformers.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
16	Micron Industries Corporation	Exact match	Sterling, IL, United StatesHQ recorded Oct 17, 2026	51-200	31 contacts →
	Exact match “For over 40 years, Micron has been the supplier of choice for original equipment manufacturers and control system builders around the world.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
17	Core Transformers	Exact match	Seneca, SC, United StatesHQ recorded Oct 17, 2026	11-50	30 contacts →
	Exact match “CORE Transformers is the premier supplier of electrical distribution transformers for the commercial, industrial, renewable, and critical power markets.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
18	Quality Transformer And Electronics	Exact match	Milpitas, CA, United StatesHQ recorded Oct 17, 2026	51-200	30 contacts →
	Exact match “Quality Transformer and Electronics designs and manufactures custom transformers, inductors, reactors and electrictronic assemblies.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
19	Instrument Transformer Equipment Corporation	Exact match	Monroe, NC, United StatesHQ recorded Oct 17, 2026	51-200	29 contacts →
	Exact match “ITEC, a MacLean Power Systems (MPS) company, specializes in the design and manufacture of dry and oil-filled transformers, ensuring the safety and reliability of electrical…” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
20	Warner Power	Exact match	Grand Haven, MI, United StatesHQ recorded Oct 17, 2026	51-200	28 contacts →
	Exact match “Warner Power is now part of Grand Power Systems!” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
21	Amran Instrument Transformers	Exact match	Sugar Land, TX, United StatesHQ recorded Oct 17, 2026	201-500	27 contacts →
	Exact match “Amran Instrument Transformers is a leading manufacturer of Low Voltage and Medium Voltage Instrument Transformers (Current and Voltage Transformers) with multiple manufacturing…” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
22	Pacific Transformer	Exact match	Anaheim, CA, United StatesHQ recorded Oct 17, 2026	51-200	26 contacts →
	Exact match “Since 1981, Pacific Transformer has remained a market leader in the field of custom transformers, magnetic engineering, and power transformer design.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
23	Toroid Corporation	Exact match	Salisbury, MD, United StatesHQ recorded Oct 17, 2026	51-200	26 contacts →
	Exact match “For over 40 years, Toroid Corporation has been a leading provider of custom-designed toroidal transformers and medical isolation transformers, proudly made in the USA.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
24	Etal Talema	Exact match	Charlotte, NC, United StatesHQ recorded Oct 17, 2026	501-1,000	25 contacts →
	Exact match “Talema is a global leader in the design and manufacture of toroidal transformers and related magnetic components, supported by a worldwide team of more than 800 professionals and…” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
25	Jefferson Electric, A Voltaris Company	Exact match	Goodyear, AZ, United StatesHQ recorded Oct 17, 2026	501-1,000	25 contacts →
	Exact match “Jefferson Electric delivers precision-engineered transformer solutions trusted across industrial, commercial, and utility markets.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “isolation transformers manufacturers”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 120 isolation transformers manufacturers based in the United States

See the full list, filter by size, metro and specialty, and access 1,287 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Isolation transformers manufacturers based in the United States at a glance

As of Oct 17, 2026

35.5%Verified-email coverage

30.2Average contacts per company

11-50Median size (employees)

5.8%Largest-city concentration · Houston

Oct 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 120 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United States whose business descriptions match “isolation transformers manufacturers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 1,287 professional contacts with verified work emails across the full matched dataset. 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 October 17, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “isolation transformers manufacturers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many isolation transformers manufacturers are there based in the United States?

RevenueBase identified 120 company matches for isolation transformers manufacturers associated with the United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Virginia Transformer Corp tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most isolation transformers manufacturers?

Houston leads with 7 company records, followed by Addison (3) and Cincinnati (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,287 professional contacts with verified work emails tracked across these 120 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 17, 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 SmartSearch, 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.