Custom Transformers

Prem Magnetics proudly develops custom transformers, working closely with you to achieve your goals. Contact us for high-quality custom transformers and coils that meet your exact specifications.

We specialize in:

  • Laminated steel power transformers rated 1.1 VA -600VA, 50/60Hz or 400Hz operation.
  • Inductors and coils.
  • Solenoid windings.
  • Ferrite transformers and inductors.

Fill out the contact form below to request a custom transformer design, prototype or build from our team.

An End-to-End Solution for Custom Transformers

Our team is here to assist throughout the entirety of the custom transformer design-build process. Prem Magnetics is an expert, family-owned manufacturer, and we are equipped with the knowledge and experience necessary to: 

  • Modify existing power transformer designs.
  • Create designs for new, innovative custom transformers for your unique application.
  • Develop prototype transformers to help bring your product to market.
  • Build new production-grade power transformers to meet your exact specifications.

For all your electrical transformer design-build needs, we are the first-choice custom transformer manufacturer.

The Benefits of Building Custom Transformers

Building a custom transformer that is uniquely designed for your application can offer unparalleled results, compared to utilizing a standard power transformer.

When you choose to design a custom transformer, you have the opportunity to define the size, mounting, core material, conductors, voltage levels, terminations, load conditions, power ratings, and all requirements. We work closely with you to best meet your needs no matter how complex they may be.

Standard power transformers are built to work for the majority; you may end up paying more for a standard transformer that offers functionality you don’t need, than building your own custom transformer that is a better physical fit, provides optimal performance for your application, reduces operating costs, saves energy, and lasts longer.

Prem Magnetics has the problem-solving skills you need to create successful custom transformers for even the most challenging environments, where space is limited or engineering requirements are unprecedented.

Why Choose Prem Magnetics for Custom Transformers?

Engineering high-quality power transformers is our specialty. We design custom transformers and coils to meet your exact specifications, and can modify any of our standard products for your application.

Prem Magnetics is the custom transformer manufacturer you can trust. We will work with you to provide the best possible custom built transformer at the most affordable price.

  • There is no minimum purchase requirement or nonrecurring engineering (NRE) charge for custom transformers or parts.
  • No order is too big or too small — we treat every request for custom electrical transformers with the same care and commitment.
  • We offer full engineering services, and all parts are 100% tested.
  • Tell us what you need or consult with our team to find the best possible solution.
  • Expect fast turnaround times, and receive high-quality custom transformers made in the USA.

Look no further for custom-made transformers and custom coils. With over 45 years of experience, we can help you get your product to market efficiently and cost-effectively. 

Custom Transformers Built by Prem Magnetics

Looking for the ideal isolation transformers, DC to DC transformers, or single phase transformer winding you can trust? We design and build a wide range of custom transformers to meet varying needs, across industries and applications. Below, we provide details on some of the custom transformers we regularly build for our customers.

Click through the tabs to learn more about the power transformers in each category.


Prem Magnetics is known for its high quality, reliable custom power transformers. Our team will expertly customize or create any of the electrical transformers below to your exact specifications.

  • Linear
  • Single Phase
  • Isolation
  • Switchmode
  • Step Up
  • Step Down
  • High Isolation
  • Printed Circuit Mount
  • Chassis Mount
  • Open Frame
  • Shielded
  • Encapsulated
  • High Efficiency
  • NRTL Capable
  • Standard/Custom Primary Voltages
  • Medical
Custom Power Transformers

Our impedance matching transformers and audio transformers are perfect for use in voice/data applications, amplifiers, and more. Choose Prem Magnetics for a high-quality, custom transformer to match any load impedance.

  • Telecom Band
  • Audio Band
  • With DC
  • Without DC
  • Printed Circuit Mount (Through-Hole & Surface Mount)
  • Chassis Mount
  • Shielded
  • Encapsulated
  • Laminated Core
  • Ferrite Core
  • Toroidal Core
  • High Isolation
Custom Impedance Matching Transformers

Our custom line matching transformers will perfectly match the output impedance of your amplifier to a number of speakers having various power ratings. Choose a custom line matching transformer for overhead paging and music in any industry or location. Browse standard line matching transformers or get in touch for a custom transformer designed and built for you.

Inputs:

  • 25V Input
  • 70.7V Input
  • 25V/70.7V Input

Mounts:

  • Printed Circuit Mount
  • Chassis Mount

Custom Transformers for All Industries and Applications

We craft high-quality custom transformers for a wide range of industries, including audio, medical, industrial, power and signal applications, and more. Here are some examples of custom transformers we build:

-          Custom transformers for aerospace.
-          Audio transformers, audio isolation transformers, and audio output transformers.
-          Medical isolation transformers.
-          Industrial power transformers and electrical transformers.
-          Household appliance transformers.
-          Transformers for class A and class B fire alarms.

Safety Standards & Regulations

Our team builds custom transformers that enable you to meet stringent regulatory requirements from the following entities and more:

-          UL
-          CSA
-          TUV
-          VDE
-          ITAR

Custom Transformers by Class, Configuration & Core

We build custom transformers to class specifications to ensure safety regulations are met. Our 100% tested custom-made transformers are designed to perform to your requirements. We frequently build the following power transformers and more:

-          Class 2 transformers
-          Class 3 transformers
-          UL Class transformers ranging from 130-200°C
-          Safety Extra Low Voltage (SELV) transformers
-          Class H transformers (180°C insulation)
-          Class B transformers (130°C insulation)
-          Class F transformers (155°C insulation)

Choose from series or parallel configurations, and choose ferrite, iron, nickel or silicon steel for the core.

Custom Transformers by Voltage

Tell us your voltage needs and we’ll build the right power transformer for you. Some of our most popular custom transformers include:

-          24V transformers
-          100V transformers
-          115 or 115/230V transformers
-          120 or 120/240V transformers
-          277V transformers

3D-Printed Bobbins for Power Transformers

In need of an unusual bobbin to go with your new custom power transformer? We can help. Our 3D printing services enable us to create 3D printed bobbins and custom plastic spools. It’s the perfect solution to create affordable prototypes and production-grade electrical transformers.

Order Your Custom Power Transformer

We build custom transformers to meet your voltage, temperature, size, mounting configuration, frequency, current, termination, and other project needs. From custom class 2 transformers and double-insulated transformers to Ethernet transformers and output transformers, we craft affordable, high-quality custom transformers that are made to last. We also build custom coils, custom inductors, and custom assemblies for our customers. 

Located in Johnsburg, Illinois, we are a family-owned custom transformer manufacturer based in the USA, with a global reach. Contact us today to get started with your custom transformer build, or to discuss how our in-depth understanding of power transformers can help your business succeed.

Contact us by phone: (815)-385-2700

Contact us by email: tech@premmag.com

 

Please complete the form below to request Custom Transformers