Company lists · Data refreshed September 2026
Top 25 Current transformer manufacturers based in the United States
RevenueBase identified 60 current transformer manufacturers headquartered in the United States as of September 2026 and tracks 1,554 professional contacts across them, including 438 with verified work emails. Grand Haven is the largest hub.
This list covers current transformer manufacturers headquartered in the United States, 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.
The 25 largest current transformer manufacturers based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 240 contacts → | ||||
Partial evidence “Systems Control, a Hubbell brand, designs and manufactures turnkey control systems and control relays that are involved in the protection and control of transmission and…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 2 | 169 contacts → | ||||
Strong evidence “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…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 3 | 104 contacts → | ||||
Indirect evidence “In 2025, Basler Electric Company was acquired by Littelfuse, Inc, a global, diversified industrial technology manufacturing company dedicated to creating a sustainable, connected…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 4 | 44 contacts → | ||||
Indirect evidence “Our mission is to maintain profitability and growth through customer satisfaction, industry leading quality and efficient product development and manufacturing.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 5 | 43 contacts → | ||||
Strong evidence “Meramec Instrument Transformer Company is the preeminent manufacturer of bushing current transformers for the high-voltage circuit breaker and large power transformer markets.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 6 | 32 contacts → | ||||
Strong evidence “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…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 7 | 31 contacts → | ||||
Partial evidence “For over 40 years, Micron has been the supplier of choice for original equipment manufacturers and control system builders around the world.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 8 | 28 contacts → | ||||
Partial evidence “Jefferson Electric delivers precision-engineered transformer solutions trusted across industrial, commercial, and utility markets.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 9 | 27 contacts → | ||||
Strong evidence “Amran Instrument Transformers is a leading manufacturer of Low Voltage and Medium Voltage Instrument Transformers (Current and Voltage Transformers) with multiple manufacturing…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 10 | 27 contacts → | ||||
Partial evidence “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.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 11 | 25 contacts → | ||||
Indirect evidence “Established in 1995, we expanded in 2001 and are continually growing and developing to deliver accurate, user-friendly, and affordable products to meet consumer needs.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 12 | 22 contacts → | ||||
Strong evidence “DynAmp is the world’s leading manufacturer of high electrical current measurement systems for industrial applications.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 13 | 22 contacts → | ||||
Strong evidence “Magnelab is a leader in the design and manufacture of custom magnetics and specializes in current sensors.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 14 | 20 contacts → | ||||
Indirect evidence “Warner Power is now part of Grand Power Systems!” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 15 | 20 contacts → | ||||
Indirect evidence “CR Magnetics offers a complete line of products to monitor any group or individual power-using equipment.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 16 | 19 contacts → | ||||
Indirect evidence “Hoyt: Measuring the World Since it’s founding in 1904, Hoyt and its employees have lived by the rule that anything worth doing is worth doing well.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 17 | 17 contacts → | ||||
Indirect evidence “Based in Marrieta, GA, ICE Components, Inc, is a top U.S.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 18 | 16 contacts → | ||||
Partial evidence “Norlake Manufacturing Company | Engineered transformers and custom transformer solutions for over 50 years.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 19 | 12 contacts → | ||||
Strong evidence “BLOCK – perfecting power BLOCK is a leading manufacturer of transformers, power supplies, electronic circuit breakers, reactors and EMI filters.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 20 | 11 contacts → | ||||
Strong evidence “Pearson Electronics is the original and leading manufacturer of precision current-monitoring transformers for accurate AC current measurement.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 21 | 9 contacts → | ||||
Indirect evidence “Sifam Tinsley Instrumentation Inc is based out of Atlanta GA and is the North American Operations Division of the “Rishabh” group (multi-national corporation primarily into…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 22 | 8 contacts → | ||||
Strong evidence “Sentran Corporation has been in business for over 20 years designing, developing, and manufacturing current transformers, transducers, and sensors.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 23 | 6 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 24 | 4 contacts → | ||||
Indirect evidence “Aim Dynamics is the leading distributor of power monitoring equipment world-wide.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 25 | 3 contacts → | ||||
Partial evidence “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…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
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: current 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 current transformer manufacturers.
- Partial evidence
- Its own public description names part of current transformer manufacturers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name current 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 60 current transformer manufacturers based in the United States
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Current 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 60 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 current 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 the United States whose own description of what they do matches “current 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 current 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 current transformer manufacturers, and records with no verified work email. Companies headquartered outside United States 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, 438 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 current 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 current transformer manufacturers are there based in the United States?
RevenueBase identified 60 current transformer manufacturers headquartered in the United States 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?
Systems Control, headquartered in Iron Mountain, tops this list with the largest team on record.
Which city has the most current transformer manufacturers?
Grand Haven leads with 2 headquartered companies, followed by Houston (2) and Longmont (2).
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 438 verified decision-maker contacts tracked across these 60 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.
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