Top 10 Dry Type Transformer Manufacturers in the USA

Dry-type transformers are the preferred choice for indoor power distribution in facilities like schools, hospitals, data centers, and commercial buildings. Unlike oil-immersed transformers, they use air circulation and solid insulation materials such as epoxy resin and Nomex, offering improved safety, low maintenance, and operational flexibility. The performance and reliability of these transformers depend on the manufacturer’s quality and engineering. Choosing a reputable manufacturer is crucial, as it affects safety, compliance, and the total cost of ownership over time. This guide provides structured profiles of the top 10 dry-type transformer manufacturers in the USA, serving as a valuable reference for electrical engineers, facility managers, procurement teams, and EPC contractors.

This list includes both U.S.-based manufacturers and global companies with significant manufacturing, distribution, and service operations across the United States. Most dry-type transformers used in the U.S. market are designed and manufactured in accordance with standards from organizations such as NEMA, IEEE, and the U.S. Department of Energy (DOE).

Leading Top Dry-Type Transformer Manufacturers Serving the U.S. Market

Here is a closer look at the ten manufacturers that consistently show up in specs, procurement lists, and engineering recommendations across North America.

1. Schneider Electric

Year Founded: 1836

Headquarters: Rueil-Malmaison, France (North American HQ: Nashville, TN)

Schneider Electric is among the most recognized names in global power management. Their Square D dry-type transformer line (Square D is Schneider Electric’s flagship North American brand) is particularly well-known in the U.S. market, with distribution transformers that cover a wide range of commercial and industrial applications. Square D transformers are sold through an extensive North American distribution network, making them highly accessible for both new installations and retrofit projects.

Schneider electric dry-type transformers conform to NEMA TP-1 energy efficiency standards and are regularly specified in healthcare facilities, educational buildings, and large commercial infrastructure projects. Their product portfolio encompasses standard distribution configurations as well as high-efficiency models designed to support compliance with current and anticipated energy codes.

2. Eaton

Year Founded: 1911

Headquarters: Dublin, Ireland (U.S. Operations: Cleveland, OH)

Eaton is a global power management company with substantial manufacturing operations in the United States. Their portfolio of Eaton dry-type transformers spans a wide voltage and kVA range, encompassing both standard catalog configurations and engineered-to-order specifications. Eaton transformers are well-regarded for their conformance to NEMA standards and for their alignment with DOE 2016 and DOE 2025 minimum efficiency guidelines.

Eaton’s transformer division benefits from the company’s broad electrical infrastructure portfolio, which means their transformers often integrate seamlessly into Eaton switchgear and panel systems. For procurement teams doing single-vendor sourcing on large projects, that integration is genuinely valuable. Lead times are competitive, and their technical support team is responsive.

3. ABB (Electrification)

Year Founded: 1988 (merger); roots back to 1883

Headquarters: Zurich, Switzerland (North America operations across multiple states)

ABB dry-type transformer products are a staple in heavy industrial and utility applications. The ABB Electrification business unit covers a broad range of distribution and specialty transformers, with cast-resin options that excel in harsh environments, high humidity, and locations with aggressive contamination risk.

ABB’s global engineering depth allows them to handle non-standard specifications that many other manufacturers struggle with. Their cast-resin dry-type units are often the go-to choice in offshore, tunneling, and chemical processing environments. In the U.S., their ABB dry-type transformer lineup is supported by regional service centers and a well-established parts network.

4. Hammond Power Solutions (HPS)

Year Founded: 1917

Headquarters: Guelph, Ontario, Canada (manufacturing plants across North America)

Hammond Power Solutions, commonly referred to as HPS, is one of the largest dry-type transformer manufacturers in North America. Hammond dry-type transformers are particularly strong in the industrial segment, covering applications from mining and oil and gas to data centers and renewable energy installations.

What sets HPS apart is their manufacturing flexibility. They produce both standard and engineered-to-order transformers, and their lead times on custom builds are generally faster than many European competitors. HPS transformers also carry UL and CSA listings, making them straightforward to specify for North American projects. Their product range spans small control transformers to large industrial units exceeding 5,000 kVA.

5. GE (General Electric)

Year Founded: 1892

Headquarters: Boston, MA

Note: GE’s transformer manufacturing operations are now part of GE Vernova and joint ventures such as Prolec GE.

General Electric is one of the most established names in U.S. electrical infrastructure. General Electric dry-type transformers have been installed in industrial facilities across the country for decades, earning a reputation for reliability and long service life. GE’s transformer division covers distribution, specialty, and industrial dry-type units across a broad voltage range.

GE transformers are frequently found in legacy installations, and their parts availability is one reason facilities managers continue to trust them. Replacement parts and technical documentation for older GE units are more accessible than for many other legacy brands, which matters a great deal for maintenance teams managing aging infrastructure.

6. Siemens (Smart Infrastructure division)

Year Founded: 1847

Headquarters: Munich, Germany (U.S. transformer operations across multiple locations)

Siemens is a global leader in energy infrastructure, and their Siemens dry-type transformer product line reflects their engineering heritage. Their dry-type units are common in utility substations, industrial facilities, and large commercial buildings. Siemens designs for long service life and high thermal performance, with products that often exceed minimum efficiency standards by a meaningful margin.

Siemens dry-type transformer options include both standard distribution units and highly engineered specialty configurations. Their local service and application engineering teams can support complex specifications, which makes them particularly useful on EPC projects where transformer requirements are tied to broader system designs.

7. Acme Electric

Year Founded: 1947

Headquarters: Lumberton, NC

Acme Electric is a well-established manufacturer with a consistent and recognized presence in the North American industrial and commercial transformer market. Acme dry-type transformers cover a practical range from small control and isolation transformers to medium-capacity distribution units. Acme Electric’s product line is characterized by reliable performance without unnecessary complexity, which makes them a pragmatic choice for engineers specifying standard applications.

Acme’s product line is particularly popular among electrical contractors and distributors because of consistent availability and competitive pricing. Their buck-boost transformers are especially widely used for voltage correction in commercial and light industrial settings. For standard applications where cost efficiency matters, Acme is a practical choice that engineers trust.

8. MGM Transformer Company

Year Founded: 1971

Headquarters: Los Angeles, CA

MGM Transformer Company is a U.S.-based manufacturer that has built a reputation for producing both new and reconditioned transformers. They serve industrial, commercial, and utility customers with a product range that includes dry-type distribution transformers, autotransformers, and specialty units.

MGM Transformers is known for their flexibility with custom and non-standard configurations. They also offer refurbishment and reconditioning services, which can be valuable for facilities looking to extend transformer life rather than replacing units outright. Their domestic manufacturing base allows for shorter lead times on certain configurations compared to offshore competitors.

9. Federal Pacific

Year Founded: 1946

Headquarters: Newark, NJ

Federal Pacific is a legacy brand historically associated with electrical equipment used in older U.S. installations. While existing units are still found in retrofit and replacement scenarios, the brand is no longer a major active manufacturer in today’s transformer market.

For facilities managing aging infrastructure, replacement strategies typically involve sourcing compatible or equivalent products from currently active manufacturers.

10. Jefferson Electric

Year Founded: 1915

Headquarters: North American fulfillment operations (brand under Acuity Brands portfolio)

Jefferson Electric is one of the older transformer brands in the U.S. market. Jefferson electric dry type transformers cover a broad range of applications, including general-purpose distribution, machine tool isolations, control power, and specialty use. Their catalog is extensive, covering both standard NEMA configurations and application-specific designs.

Jefferson is especially known for their control and isolation transformer range, which is widely used in manufacturing automation environments. Their products are consistently available through North American distributors, and the brand’s long track record in the U.S. industrial market gives specifying engineers a level of confidence that newer brands have not yet established.

Comparison Table: Top 10 Dry-Type Transformer Manufacturers Compared

Here is a side-by-side look at the key specifications that procurement teams and engineers typically evaluate when shortlisting manufacturers.

Note: Capacities and lead times are indicative and may vary based on configuration, customization, and market demand.

What Makes Bruce Electric the Top Dry Type Transformer Distributor?

Bruce Electric Equipment has established itself as a trusted industrial transformer distributor in the U.S. by combining decades of experience with deep technical expertise and a large, ready-to-ship inventory. Since 1973, the company has supported engineers, facility managers, and procurement teams with accurate specification guidance, fast sourcing, and reliable product availability from leading brands such as General Electric (G.E.), Acme Electric, SolaHD, ABB, and Hammond Power Solutions. Offering new, used, and reconditioned equipment, Bruce Electric provides flexible, cost-effective solutions for both standard and urgent replacement needs, backed by responsive customer support and technical assistance that help reduce downtime and procurement risk.

FAQs

Q1. Who is the largest transformer manufacturer in the USA?

There is no single largest manufacturer; companies like Schneider Electric, Eaton, GE, ABB, and Siemens are among the leading players in the U.S. market.

Q2. What industries use dry-type transformers?

Dry-type transformers are widely used in commercial buildings, healthcare facilities, data centers, manufacturing plants, and infrastructure projects for safe indoor power distribution.

Q3. What types of dry-type transformers are commonly used?

Common types include general-purpose distribution, isolation, control power, and buck-boost transformers, along with cast resin units for harsh environments.