Custom Transformers

designed to meet customer specifications. Built to exceed customer expectations.

Our transformers are designed to your project requirements, then manufactured and tested in accordance with ANSI and IEEE standards. We carry NRTL to UL certifications and our custom transformers can be marked with CSA or CE Mark.

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Capabilities & Options

Our custom transformers can be designed to meet a broad range of electrical requirements and include a wide range of options. Whether world-wide voltage inputs, circuit protection devices, low inrush or noise attenuation is required, QT&E engineers and sales staff can work with you to establish a specification and design that includes and meets all your design requirements.

Prototype to Production Run

Custom transformers designed to your requirements, then built, tested and shipped with industry leading turn-around times.

Prototype your custom transformer

We work with your engineers to develop prototypes or specialized “one-off” units. Units for test or experimental applications may only ever be built once or in small quantity. But if there is ongoing need for a part, we can provide this "first" unit for proof of concept and perform First Article inspections and tests.


Production-run custom transformers, designed to meet price-points and lead-times

With over 65,000 sqft. of manufacturing space, and multiple ISO registered production facilities, we provide volue production in support of custom product lines. We utilize lean manufacturing techniques and JIT practices with our suppliers to meet customer delivery requirements with world-wide distribution.

By the numbers


Years of combined staff transformer design experience


Years of transformer manufacturing experience


Transformer, inductor/reactor and assembly designs

Designed to Fit

Our engineers can design units to fit your specific application. We have over 50 years designing transformers that meet the needs of strict environments and space constraints. Whether you are trying to replace a transformer that is no longer supported and have specific mounting dimensions you need to meet, or your space capacity only gives room for an unconventional unit, we can work around your spacial requirements to design a unit that fits your needs.

Environmental Considerations in Transformer Design

Our custom transformers can be designed to meet numerous man-made and naturally occurring environmental conditions. We have designed and manufactured units to operate under harsh environmental conditions in innovative ways, including all types of NEMA and IP-rated enclosures, cast coils, and more. We build parts for quality and reliability and have custom transformers and sub-assemblies that have been in operation for over 30+ years in semi-exposed environments and continue to perform to design specifications. Some of the conditions to consider when developing project specifications include:

  • Wind iconWind
  • Snow iconSnow
  • Heat/cold iconHeat and Cold
  • Salt iconSalt
  • Rain iconRain
  • Sand iconSand and conductive sand
  • Chemicals iconCaustic chemicals
  • Elevation iconHigh elevations
  • Down-hole iconDown-hole environments
  • Marine iconMarine and seaboard units

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