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OEM Custom

Custom Transformers

Decades of design experience coupled with documented and proven processes, assures the right products delivered where you need them when you need them.
Our warehousing facilities in South Texas and Central Illinois insure our ability to deliver your KANBAN quantities where ever you need them.
Fine wire, Litz wire, foil, square or rectangular, no matter the size or core material, our equipment and methods guarantee the most cost effective product for your power density needs.
Our engineers, armed with our latest design software, can rapidly configure your custom design, allowing you to see a quote in 48 hours or less.

Specialty Assemblies


With in house metal fabrication capability, Schumacher's ability to configure and paint a chassis to meet your products' requirements is second to none.
Wiring harnesses, with all possible types of termination configurations, are readily available. Schumacher possesses the equipment, experience and knowledge to assure your connections are configured properly every time.

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Toroidal Products


From the smallest current through 5KVA, our designers can configure your custom design into a Toroidal shape to fit your specific requirements.
From single winding, 1/4'' I.D. up through multiple windings with O.D's exceeding 12'', our capabilities includes segment winding, foil shields, potted center for mounting and complete encapsulation.

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Low Profile UI Design


From the smallest current through 3KVA, our designers can configure your custom design into a variety of low profile shapes. These shapes not only offer a space solution, they can offer lower stray field to nearby components.

  • Multi flange Bobbins, Paper Section, Precision Layer
  • Fine wire, foil, square, rectangular or combinations
  • UI or Toroidal cores configuration
  • Lead & Terminals, Line Cord, Lugs, PCB Pins
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Linear Power Transformers


Our designers have several configurations to choose from when working on your custom design.

  • Multi flange Bobbins, Paper Section, Precision Layer
  • EI, UI or Toroidal cores configuration
  • Lead & Terminals, Line Cord, Lugs
  • Standoffs, Custom brackets, Shells


  • Inputs through 600 Vrms 50-400 Hz
  • Outputs through 2500 Vrms
  • VA rating up to 15KVA
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High Frequency Magnetics


Our designers have several configurations to choose from when working on your custom design.

  • Multi flange Bobbins, Paper Section, Precision Layer
  • Triple coated, Fine wire, Litz wire, foil, square, rectangular or combinations
  • Toroidal cores, EE configurations of all sizes
  • Lead & Terminals, PCB Pins, custom PCB headers, Surface Mount
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