Diverse Manufacturing - Full Turnkey Capabilities
Low or High Volume Production - On-Time Deliveries

Toroidal Transformers

Assembly Masters is a quality manufacturer of custom toroidal transformers. We use advanced production and test equipment that allows us to meet and exceed our customers’ specifications.

Toroidal Transformers

All of our transformers are 100% tested using micro ohmmeters, LCR meters, turns counters and hi-pot testers that are calibrated and traceable to the high national standards set by our industry.

We are committed to:
  • The production of high-performance toroidal transformers and chokes
  • Serving our customers’ needs from small to large production
  • Providing toroidal transformers with a wide range of construction features
We have the following capabilities:
  • Minimum ID .180 Inches
  • Maximum OD 17 Inches
  • Minimum wire size 36 AWG
  • Maximum wire size 9 AWG or Bifilar 10 AWG
  • Maximum coil height 7 Inches
  • Tape width 5/16 to 1 Inch
  • Lead dressing to fit customer requirements
Mounting and terminal options
  • Self leads
  • Stranded wire leads
  • Custom connectors
  • Lead attachments that are mechanically and electrically sound
Toroidal Core options
  • Iron powder
  • Ferrite
  • Silicon steel
Toroidal Transformer
Toroidal Transformer

Industries Served

  • Audio
  • Broadcast
  • Electromechanical
  • Electronic
  • Lighting
  • Power Transmission

Committed to High-Quality Components

Assembly Masters is committed to producing high-quality assemblies.

Advanced Production & Testing

At Assembly Masters, we are proud of our track record of exceeding our customers' expectations with quality assurance, diverse manufacturing, and on-time delivery.

Established in 2000, Assembly Masters is committed to providing our customers with high-quality products, since our founding, we have made right on that promise and continue to with our attention to detail and adherence to the high standards set by our industry.

At Assembly Masters, we use advanced production and testing; our precision custom assemblies will meet or exceed your requirements.

RoHS CompliantWe offer built-to-spec products that precisely meet your needs. RoHS compliant products are available as required.
  • High return on investment
  • Reduced inventory investment
  • Lower inventory risk
  • Reduced space and labor
From the Midwest, across the Americas, and worldwide, our manufacturing has earned a reputation for consistency and superior quality in our products. Bring us your design, and let us show you what we can do!

To learn more about our toroidal transformers, contact the professionals at Assembly Masters or call (574) 293-9026.

Competitively priced, quality-driven toroidal transformers.

Back to Top  Contact Us


Yes we are open and manufacturing cables and assemblies at full capacity during the Coronavirus. Is your foreign manufacturer letting you down? Let us help you with Made In the U.S.A. manufacturing capabilities.