- Tamura Corporation
 - Supples telecom, DSL, audio, modem, and power transformers; DC-DC converters; inductors; and DC-AC backlight inverters. - NSOEM, Inc.
- Sales and engineering of electrical transformers including oil-filled, liquid-filled, cast coil, and dry type, as well as industrial grade electrical enclosures and solid state motorstarters.
- AAA Acme General Electrical Power Transformer Distribution
- Wholesale supplier of electric power transformers including Acme and GE brands. Includes step up, step down, three phase, distribution, and buck boost models.
- Electric Service Company
- Offers emergency transformer replacement and repair.
 Cam Tran
- Manufactures and refurbishes oil-filled distribution transformers for global utility/power corporations and contractors/developers.- CR Magnetics, Inc.
- Manufacturer of electrical current and power monitoring products, including current transformers, watt/var transducers, current transducers and current indicators.
- Tesla Transformers
- Exports distribution, power, utilised, standard, dye type, ring main unit, flame proof, and custom transformers.
- Kotsons Transformers
- Manufactures power transformers for use in utilities plant.
- Niagara Transformer Corp.
- Manufactures liquid-filled, dry-type, cast coil, drive duty, rectifier duty, and distribution duty transformers.
- S.D. Myers, Inc.
- Transformer consultants offering maintenance and life extension service.
- Dongan Electric Manufacturing Co.
- Manufactures general purpose, dry type, industrial control, buck-boost, drive isolation, and custom transformers.
- Schumacher Electric Corporation
- Manufacturer of custom-built transformers, battery chargers, welders, and portable power supplies.
- Sunbelt Transformer, Inc.
- Manufacture mid-voltage power and distribution transformers for commercial and industrial use.
- FLEX-CORE
- Manufacturers of flexible core and split-core current transformers.
- Kanohar Electricals Limited
- Manufacturers of power transformers.
- TEMCo Transformer Manufacturer
- Manufacturer of stock and custom electrical power transformers including power isolation transformers, step up, step down, and electric buck boost transformers.
- Q-Tran
- Serving the lighting and emergency lighting industry with remote toroidial transformers and power supply centres.
- MGM Transformer Company
- Manufacturer of dry and liquid-filled transformers.
- Miami Transformers
- Offers used electrical surplus materials including, transformers, generators, breakers, turbines, electric motors, and utility vehicles.
- TaeHwaTrans Co., Ltd.
- Manufacturer of current transformers for energy meters, zero phase current transformers for ELCB and GFCIs, Rogowski coils, transducer, and more.
- Alfa Transformer
- Delivering transformers and switchgears to industry, resellers, contractors, government, and utilities.
- Elytone Electronic
- Manufacturers of power, telecom, toroidal, pulse, SMD, and high frequency transformers, as well as current sensors, chokes, inductors and, coils.
- ElectronicTransformer.com
- Specializing in transformers for lighting, cable systems, landscaping, marine, display, undercabinet, and other applications.
- Instrument Transformers Ltd
- Designer and manufacturer of current and voltage instrument transformers.
- Transformer Protector Corp.
- Learn how to avoid transformer explosions and fires caused by short circuits in oil-filled transformers with the Transformer Protector.
- Tusco Trafo Co., Ltd.
- Manufactures standard transformers for industrial, mining, and utility applications. Also offers medium and low voltage switch gear products.
- Alamo Transformer Supply Company
- Supplier of new, reconditioned and remanufactured transformers. Also provides repair services for utility style distribution transformers.
- Asia Electric Transformers
- Manufactures dry type, oil-cooled, control and instrument, and cast resin transformers for use in electronics manufacturing, UPS, marine, and petrochemical applications.
- Electrical Transformer Control Equipment Corp.
- Distributors of transformers, circuit breakers, and motor controls.
- Isolation Transformer Sales
- Power isolation transformers at wholesale prices. Models include drive, three phase, medical grade, and custom line isolation transformers.
- KOC-Electric Co., Ltd.
- Manufactures transformers for the industrial and Marine industries.
- Daelim Electronics
- Maker of transformers and AC adapters.
- VoltageTransformers.com
- Offering a range of converters, inverters, regulators, and adapters for common voltages worldwide.
- Kosen Industrial, Ltd.
- Manufacturer of r-core transformers.
- Alibaba: Transformers
- Find trade leads for transformer manufacturers, exporters, suppliers, traders, companies, and factories.
- GPS Transmission & Distribution
- Global Power Supply T&D specializes in padmount, GSU, and station transformers along with high and low voltage switchgear, circuit breakers, and asset recovery.
- Power Transformer Co.
- Resource for power transformer questions and answers, articles on types including step down and isolation of Federal Pacific, Jefferson, and Amveco.
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