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Johnson Electric Coil Company

Design and Manufacturing Capabilities

Quality Products made in Antigo, Wisconsin USA

Johnson Electric Coil Company takes a customized approach to every inquiry, design, and manufacturing process to meet your particular requirements using:

  • Wire sizes ranging from AWG 1/0 Square including rectangular shapes to AWG 40
  • Lamination center leg sizes from half inch to five inch standard sizes and shapes
  • Custom lamination sizes to nine inch center leg
  • Butt stacked, interleaved, gapped, and distributed gap core configurations
  • Strip wound toroidal and C cores
  • Ferrite and powder core construction for high frequency, high efficiency transformer and inductor applications
  • Customized winding configurations and taps, core geometries and orientation, winding terminations, connection options, mounting accommodations, size and shape—all to suit your special installation needs or limitations
Winding configurations
  • Toroidal—layer, random, or bank wound
  • Paper section multiple wound and single piece wound
  • Bobbin wound
  • Precision or perfect layer wound
  • Single or multiple conductor wound
  • Copper foil wound for high current and high frequency applications
  • Concentric, side by side, or interleaved windings, depending on electrical parameters, space limitations, and spacing requirements
We have the latest in automated programmable and mechanical lathe type winding technology to handle a broad range of conductor sizes and configurations.

Single Phase Isolation Transformer

Types of products include

  • Step down, Step up, and Straight Isolation Transformers
  • Auto Transformers
  • Power Transformers
  • High Voltage Transformers
  • High Reactance Transformers
  • Current Transformers
  • Buck Boost Transformers
  • Inverter Transformers
  • Interphase Transformers
  • Inductors
  • Chokes
  • Reactors
  • Product assemblies including transformers and other components
  • Single Phase and Three Phase
  • 50 Hz to High Frequency
  • Power ranging from fractional VA to 250 kVA
  • Primary voltages to 600 volts
  • Secondary voltages to 16,000 volts DC

Single Phase Autotransformers

“Unified - Unselfish - Single Minded
Outstanding Customer Service”