Company lists · Data refreshed September 2026
Top 25 Isolation transformer manufacturers based in the United States
RevenueBase identified 69 company matches for isolation transformer manufacturers associated with the United States as of September 2026 and tracks 1,504 professional contacts across them, including 367 with verified work emails. Addison is the largest hub.
This list covers company matches for isolation transformer 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 September 30, 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.
The 25 largest isolation transformer manufacturers based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 202 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 · Sep 30, 2026 · View company records in RevenueBase | |||||
| 2 | 177 contacts → | ||||
Exact match “NWL Inc.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 3 | 169 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 · Sep 30, 2026 · View company records in RevenueBase | |||||
| 4 | 147 contacts → | ||||
Exact match “MGM Transformers is now part of Forgent Power Solutions.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 5 | 86 contacts → | ||||
Exact match “VanTran Transformers is now part of Forgent Power Solutions.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 6 | 51 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 · Sep 30, 2026 · View company records in RevenueBase | |||||
| 7 | 46 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 · Sep 30, 2026 · View company records in RevenueBase | |||||
| 8 | 32 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 · Sep 30, 2026 · View company records in RevenueBase | |||||
| 9 | 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 · Sep 30, 2026 · View company records in RevenueBase | |||||
| 10 | 31 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 · Sep 30, 2026 · View company records in RevenueBase | |||||
| 11 | 28 contacts → | ||||
Exact match “Jefferson Electric delivers precision-engineered transformer solutions trusted across industrial, commercial, and utility markets.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 12 | 27 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 · Sep 30, 2026 · View company records in RevenueBase | |||||
| 13 | 27 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 · Sep 30, 2026 · View company records in RevenueBase | |||||
| 14 | 20 contacts → | ||||
Exact match “Warner Power is now part of Grand Power Systems!” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 15 | 16 contacts → | ||||
Exact match “Norlake Manufacturing Company | Engineered transformers and custom transformer solutions for over 50 years.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 16 | 13 contacts → | ||||
Exact match “MAKING THE FIRST CHOICE AN EASY CHOICE Acutran dry-type transformers are available in multiple designs.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 17 | 12 contacts → | ||||
Exact match “BLOCK – perfecting power BLOCK is a leading manufacturer of transformers, power supplies, electronic circuit breakers, reactors and EMI filters.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 18 | 11 contacts → | ||||
Exact match “At D Volt Co, we help accelerate the infrastructure behind AI and next-generation data centers.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 19 | 11 contacts → | ||||
Exact match “Custom transformer design and manufacture” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 20 | 8 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 21 | 7 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 22 | 4 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 23 | 4 contacts → | ||||
Exact match “As the Flagship of Custom magnetics, Ensign has come a long way since 1939.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 24 | 3 contacts → | ||||
Exact match “Amgis Toroidal Power Products is now offering an extensive line of toroidal power transformers and products, including off the shelf products and custom designed toroidal…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase | |||||
| 25 | 2 contacts → | ||||
Exact match “Shape LLC is a leading designer and manufacturer of custom electrical transformers.” Recorded in the RevenueBase company graph · Sep 30, 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 transformer 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 69 isolation transformer manufacturers based in the United States
See the full list, filter by size, metro and specialty, and access 367 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Isolation transformer manufacturers based in the United States at a glance
As of Sep 30, 2026Companies by employee count
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 69 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 transformer 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 367 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 September 30, 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 transformer manufacturers”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many isolation transformer manufacturers are there based in the United States?
RevenueBase identified 69 company matches for isolation transformer manufacturers associated with the United States as of September 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?
HD Hyundai Power Transformers Usa, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most isolation transformer manufacturers?
Addison leads with 3 company records, followed by Grand Haven (3) and Cincinnati (2).
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 367 professional contacts with verified work emails tracked across these 69 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 September 30, 2026.
Ready to reach these companies? Verified emails and direct dials for all 69 isolation transformer manufacturers based in the United States. Start with a free account, no credit card.
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Isolation transformer manufacturers by geography
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Isolation transformer manufacturers based in India
- Isolation transformer manufacturers based in Italy
- AI companies based in the United States
- Cybersecurity companies based in the United States
- Manufacturing companies based in the United States
- Media companies based in the United States
Company intelligence · public preview
Top 25 isolation transformer manufacturers based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 69 matching company records for isolation transformer manufacturers based in the United States, with 1,504 tracked contacts and 367 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 30, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 isolation transformer manufacturers based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | HD Hyundai Power Transformers Usa, INChhiamerica.com HQ: Montgomery, AL, United StatesReported employees: 201-500 | Montgomery, AL, United States | 201-500 | Exact match | 202 contacts → |
“HD Hyundai Power Transformers USA, Inc, a subsidiary of HD Hyundai Electric Systems, stands as a premier transformer manufacturer located in Montgomery, Alabama.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | NWLnwl.com HQ: Bordentown, NJ, United StatesReported employees: 201-500 | Bordentown, NJ, United States | 201-500 | Exact match | 177 contacts → |
“NWL Inc.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Pennsylvania Transformer Technology LLC PTTpatransformer.com HQ: Canonsburg, PA, United StatesReported employees: 201-500 | Canonsburg, PA, United States | 201-500 | Exact match | 169 contacts → |
“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 description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | MGM Transformersmgmtransformer.com HQ: Vernon, CA, United StatesReported employees: 201-500 | Vernon, CA, United States | 201-500 | Exact match | 147 contacts → |
“MGM Transformers is now part of Forgent Power Solutions.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Vantran Transformersvantran.com HQ: Waco, TX, United StatesReported employees: 51-200 | Waco, TX, United States | 51-200 | Exact match | 86 contacts → |
“VanTran Transformers is now part of Forgent Power Solutions.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Olsun Electrics Corporationolsun.com HQ: Richmond, IL, United StatesReported employees: 51-200 | Richmond, IL, United States | 51-200 | Exact match | 51 contacts → |
“75 Years of Engineering Excellence in the Delivered Worldwide Olsun Electrics is the industry’s most trusted partner for custom dry-type transformers.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Neeltran INCneeltran.com HQ: New Milford, CT, United StatesReported employees: 51-200 | New Milford, CT, United States | 51-200 | Exact match | 46 contacts → |
“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 description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | HQ: Monroe, NC, United StatesReported employees: 51-200 | Monroe, NC, United States | 51-200 | Exact match | 32 contacts → |
“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 description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Micron Industries Corporationmicronpower.com HQ: Sterling, IL, United StatesReported employees: 51-200 | Sterling, IL, United States | 51-200 | Exact match | 31 contacts → |
“For over 40 years, Micron has been the supplier of choice for original equipment manufacturers and control system builders around the world.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Vanguard Electronicsve1.com HQ: Huntington Beach, CA, United StatesReported employees: 201-500 | Huntington Beach, CA, United States | 201-500 | Exact match | 31 contacts → |
“Vanguard Electronics has been an industry leader for over 60 years in the design and manufacture of inductors and transformers.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Jefferson Electric, A Voltaris Companyvoltarispower.com HQ: Goodyear, AZ, United StatesReported employees: 501-1,000 | Goodyear, AZ, United States | 501-1,000 | Exact match | 28 contacts → |
“Jefferson Electric delivers precision-engineered transformer solutions trusted across industrial, commercial, and utility markets.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Pacific Transformerpactran.com HQ: Anaheim, CA, United StatesReported employees: 51-200 | Anaheim, CA, United States | 51-200 | Exact match | 27 contacts → |
“Since 1981, Pacific Transformer has remained a market leader in the field of custom transformers, magnetic engineering, and power transformer design.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Toroid Corporationtoroid.com HQ: Salisbury, MD, United StatesReported employees: 51-200 | Salisbury, MD, United States | 51-200 | Exact match | 27 contacts → |
“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 description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Warner Powergrandpowersystems.com HQ: Grand Haven, MI, United StatesReported employees: 51-200 | Grand Haven, MI, United States | 51-200 | Exact match | 20 contacts → |
“Warner Power is now part of Grand Power Systems!” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Norlake Manufacturingnorlakemfg.com HQ: North Ridgeville, OH, United StatesReported employees: 11-50 | North Ridgeville, OH, United States | 11-50 | Exact match | 16 contacts → |
“Norlake Manufacturing Company | Engineered transformers and custom transformer solutions for over 50 years.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Acutran Transformersacutran.comHQ: Fombell, PA, United StatesReported employees: 11-50 | Fombell, PA, United States | 11-50 | Exact match | 13 contacts → |
“MAKING THE FIRST CHOICE AN EASY CHOICE Acutran dry-type transformers are available in multiple designs.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Block Usa, INCblockusa.com HQ: Franklin Park, IL, United StatesReported employees: 11-50 | Franklin Park, IL, United States | 11-50 | Exact match | 12 contacts → |
“BLOCK – perfecting power BLOCK is a leading manufacturer of transformers, power supplies, electronic circuit breakers, reactors and EMI filters.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | D Volt COd-volt.co HQ: Houston, TX, United StatesReported employees: 11-50 | Houston, TX, United States | 11-50 | Exact match | 11 contacts → |
“At D Volt Co, we help accelerate the infrastructure behind AI and next-generation data centers.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Macro Magneticsmacromagnetics.com HQ: Grand Haven, MI, United StatesReported employees: 11-50 | Grand Haven, MI, United States | 11-50 | Exact match | 11 contacts → |
“Custom transformer design and manufacture” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Custom Magnetics Of California Incorporatedcmi-power.com HQ: Pomona, CA, United StatesReported employees: 1-10 | Pomona, CA, United States | 1-10 | Exact match | 8 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 21 | Bridgeport Magnetics Group, INCbridgeportmagneticsgroup.com HQ: Shelton, CT, United StatesReported employees: 11-50 | Shelton, CT, United States | 11-50 | Exact match | 7 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 22 | Central Moloney, INCcentralmoloneyinc.com HQ: Pine Bluff, AR, United StatesReported employees: 501-1,000 | Pine Bluff, AR, United States | 501-1,000 | Exact match | 4 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 23 | Ensign Corporationensigncorp.com HQ: Bellevue, IA, United StatesReported employees: 11-50 | Bellevue, IA, United States | 11-50 | Exact match | 4 contacts → |
“As the Flagship of Custom magnetics, Ensign has come a long way since 1939.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Amgis LLCamgistoroids.com HQ: Houston, TX, United StatesReported employees: 51-200 | Houston, TX, United States | 51-200 | Exact match | 3 contacts → |
“Amgis Toroidal Power Products is now offering an extensive line of toroidal power transformers and products, including off the shelf products and custom designed toroidal…” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Shape LLCshapellc.com HQ: Addison, IL, United StatesReported employees: 11-50 | Addison, IL, United States | 11-50 | Exact match | 2 contacts → |
“Shape LLC is a leading designer and manufacturer of custom electrical transformers.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 69 company matches
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Isolation transformer manufacturers: dataset insights
September 30, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
68 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 69 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 30, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for isolation transformer manufacturers?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many isolation transformer manufacturers did RevenueBase find based in the United States?
The saved snapshot records 69 matching company records, 1,504 tracked contacts and 367 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 30, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Isolation transformer manufacturers by geography
Cite this list
RevenueBase Data Team. Top 25 isolation transformer manufacturers based in the United States. Snapshot: September 30, 2026. https://revenuebase.ai/companies/isolation-transformer-manufacturers/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Isolation transformer manufacturers based in India
- Isolation transformer manufacturers based in Italy
- AI companies based in the United States
- Cybersecurity companies based in the United States
- Manufacturing companies based in the United States
- Media companies based in the United States
Company intelligence · public preview
Top 25 isolation transformer manufacturers based in the United States
RevenueBase records 69 matching company records for isolation transformer manufacturers based in the United States, with 1,504 tracked contacts and 367 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 30, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 isolation transformer manufacturers based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | HD Hyundai Power Transformers Usa, INChhiamerica.com HQ: Montgomery, AL, United StatesReported employees: 201-500 | Montgomery, AL, United States | 201-500 | Exact match | 202 contacts → |
“HD Hyundai Power Transformers USA, Inc, a subsidiary of HD Hyundai Electric Systems, stands as a premier transformer manufacturer located in Montgomery, Alabama.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | NWLnwl.com HQ: Bordentown, NJ, United StatesReported employees: 201-500 | Bordentown, NJ, United States | 201-500 | Exact match | 177 contacts → |
“NWL Inc.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Pennsylvania Transformer Technology LLC PTTpatransformer.com HQ: Canonsburg, PA, United StatesReported employees: 201-500 | Canonsburg, PA, United States | 201-500 | Exact match | 169 contacts → |
“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 description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | MGM Transformersmgmtransformer.com HQ: Vernon, CA, United StatesReported employees: 201-500 | Vernon, CA, United States | 201-500 | Exact match | 147 contacts → |
“MGM Transformers is now part of Forgent Power Solutions.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Vantran Transformersvantran.com HQ: Waco, TX, United StatesReported employees: 51-200 | Waco, TX, United States | 51-200 | Exact match | 86 contacts → |
“VanTran Transformers is now part of Forgent Power Solutions.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Olsun Electrics Corporationolsun.com HQ: Richmond, IL, United StatesReported employees: 51-200 | Richmond, IL, United States | 51-200 | Exact match | 51 contacts → |
“75 Years of Engineering Excellence in the Delivered Worldwide Olsun Electrics is the industry’s most trusted partner for custom dry-type transformers.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Neeltran INCneeltran.com HQ: New Milford, CT, United StatesReported employees: 51-200 | New Milford, CT, United States | 51-200 | Exact match | 46 contacts → |
“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 description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | HQ: Monroe, NC, United StatesReported employees: 51-200 | Monroe, NC, United States | 51-200 | Exact match | 32 contacts → |
“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 description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Micron Industries Corporationmicronpower.com HQ: Sterling, IL, United StatesReported employees: 51-200 | Sterling, IL, United States | 51-200 | Exact match | 31 contacts → |
“For over 40 years, Micron has been the supplier of choice for original equipment manufacturers and control system builders around the world.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Vanguard Electronicsve1.com HQ: Huntington Beach, CA, United StatesReported employees: 201-500 | Huntington Beach, CA, United States | 201-500 | Exact match | 31 contacts → |
“Vanguard Electronics has been an industry leader for over 60 years in the design and manufacture of inductors and transformers.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Jefferson Electric, A Voltaris Companyvoltarispower.com HQ: Goodyear, AZ, United StatesReported employees: 501-1,000 | Goodyear, AZ, United States | 501-1,000 | Exact match | 28 contacts → |
“Jefferson Electric delivers precision-engineered transformer solutions trusted across industrial, commercial, and utility markets.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Pacific Transformerpactran.com HQ: Anaheim, CA, United StatesReported employees: 51-200 | Anaheim, CA, United States | 51-200 | Exact match | 27 contacts → |
“Since 1981, Pacific Transformer has remained a market leader in the field of custom transformers, magnetic engineering, and power transformer design.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Toroid Corporationtoroid.com HQ: Salisbury, MD, United StatesReported employees: 51-200 | Salisbury, MD, United States | 51-200 | Exact match | 27 contacts → |
“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 description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Warner Powergrandpowersystems.com HQ: Grand Haven, MI, United StatesReported employees: 51-200 | Grand Haven, MI, United States | 51-200 | Exact match | 20 contacts → |
“Warner Power is now part of Grand Power Systems!” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Norlake Manufacturingnorlakemfg.com HQ: North Ridgeville, OH, United StatesReported employees: 11-50 | North Ridgeville, OH, United States | 11-50 | Exact match | 16 contacts → |
“Norlake Manufacturing Company | Engineered transformers and custom transformer solutions for over 50 years.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Acutran Transformersacutran.com HQ: Fombell, PA, United StatesReported employees: 11-50 | Fombell, PA, United States | 11-50 | Exact match | 13 contacts → |
“MAKING THE FIRST CHOICE AN EASY CHOICE Acutran dry-type transformers are available in multiple designs.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Block Usa, INCblockusa.com HQ: Franklin Park, IL, United StatesReported employees: 11-50 | Franklin Park, IL, United States | 11-50 | Exact match | 12 contacts → |
“BLOCK – perfecting power BLOCK is a leading manufacturer of transformers, power supplies, electronic circuit breakers, reactors and EMI filters.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | D Volt COd-volt.co HQ: Houston, TX, United StatesReported employees: 11-50 | Houston, TX, United States | 11-50 | Exact match | 11 contacts → |
“At D Volt Co, we help accelerate the infrastructure behind AI and next-generation data centers.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Macro Magneticsmacromagnetics.com HQ: Grand Haven, MI, United StatesReported employees: 11-50 | Grand Haven, MI, United States | 11-50 | Exact match | 11 contacts → |
“Custom transformer design and manufacture” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Custom Magnetics Of California Incorporatedcmi-power.com HQ: Pomona, CA, United StatesReported employees: 1-10 | Pomona, CA, United States | 1-10 | Exact match | 8 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 21 | Bridgeport Magnetics Group, INCbridgeportmagneticsgroup.com HQ: Shelton, CT, United StatesReported employees: 11-50 | Shelton, CT, United States | 11-50 | Exact match | 7 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 22 | Central Moloney, INCcentralmoloneyinc.com HQ: Pine Bluff, AR, United StatesReported employees: 501-1,000 | Pine Bluff, AR, United States | 501-1,000 | Exact match | 4 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 23 | Ensign Corporationensigncorp.com HQ: Bellevue, IA, United StatesReported employees: 11-50 | Bellevue, IA, United States | 11-50 | Exact match | 4 contacts → |
“As the Flagship of Custom magnetics, Ensign has come a long way since 1939.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Amgis LLCamgistoroids.com HQ: Houston, TX, United StatesReported employees: 51-200 | Houston, TX, United States | 51-200 | Exact match | 3 contacts → |
“Amgis Toroidal Power Products is now offering an extensive line of toroidal power transformers and products, including off the shelf products and custom designed toroidal…” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Shape LLCshapellc.com HQ: Addison, IL, United StatesReported employees: 11-50 | Addison, IL, United States | 11-50 | Exact match | 2 contacts → |
“Shape LLC is a leading designer and manufacturer of custom electrical transformers.” Recorded description excerpt · September 30, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 69 company matches
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Isolation transformer manufacturers: dataset insights
September 30, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
68 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 69 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 30, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for isolation transformer manufacturers?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many isolation transformer manufacturers did RevenueBase find based in the United States?
The saved snapshot records 69 matching company records, 1,504 tracked contacts and 367 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 30, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Isolation transformer manufacturers by geography
Cite this list
RevenueBase Data Team. Top 25 isolation transformer manufacturers based in the United States. Snapshot: September 30, 2026. https://revenuebase.ai/companies/isolation-transformer-manufacturers/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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