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Tailored For Your Specific Need


Our custom three-phase inductors are used in applications including aviation, power conditioning, renewable energy power conversion and high-power battery charging, to name a few.


Designs may incorporate foil and high-temperature windings, strip-wound amorphous metal, ferrite or high-grade steel cores. Dimensions and mountings are tailored to suit your specific need. Inductors can also be incorporated into the primary winding of a transformer to save both cost and space.


Example Types of 3 Phase Inductors & Chokes:


  • 3 Phase DC
  • 3 Phase AC
  • Military, Aviation and Aerospace
  • Zig-Zag

  • High Current / High Frequency / High Voltage

  • Litz / Copper Foil Winding




Recent Work

3 Phase Inductive Load (EC Custom Model 222036)


3 Phase Inductive Load (EC Custom Model 222036)

20uH @ 50Arms, 30-500Hz.
Constructed with copper foil & grain oriented electrical steel.
Overall dim: 4"W x 3.85"H x 2.25"D.
Approx. Inductor weight: 3.0 Lbs.



Step-Down Power Transformer


Motor Simulating Inductor 39uH (EC Custom Model 220036)

3 Phase, 39uH @ 70Arms, 400-1500Hz
Weight: 16 Lbs
Temp Class: 180C
Operating voltage: 600V
Built with Nanocrystalline Core and Copper Foil wound 0.8mm x 2.25” wide
Custom Brackets and Bus Bar terminations




Step-Down Power Transformer


Three-Phase AC Reactor - 3KVAR @ 400Hz (Model 216037)

This AC Inductor is one of a family of parts designed for airport ground support test equipment. Used on a 400Hz, 208V line-line power system (120V line-neutral), this reactor is constructed using 10AWG rectangular magnet wire assembled on a specialty M2 electrical grade shunt steel core and non-magnetic aluminum brackets. Class H (180C) insulation system.


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3-Phase Inductors, Chokes & Reactors Capabilities at Electronic Craftsmen

  • Inductance: uH to H

  • Currents to 1100A nominal, AC or DC

  • AC Ripple Current and Harmonics accommodated to specification

  • Working Voltage up to 12kV (depending on frequency); multiple stages possible for higher outputs

  • Frequency: 25Hz to 500kHz (typical)

  • Temperature Class to 220C (155C / Class F typical)

  • Weight: 0.06 oz / 1g to 550 lbs / 250kg

  • Multiple taps as required

  • Dielectric Strength (hipot) to 30kVac or 20kVdc

  • Parts can be vacuum varnished or molded with a variety of hard or soft encapsulant materials with thermal conductivity.

  • Wire sizes from 1-45 AWG or Copper Foil to 0.050in thick (in multiple layers for higher current); Litz wire for higher frequency

  • Regulation to specification
  • Manufactured using all known state-of-the-art magnetic core materials, including but not limited to electrical grade steel laminations, ferrites & powdered iron, nickel-iron alloy, iron amorphous metal strip-wound cores, nanocrystalline cores and small toroids.
  • Antifungal and non-nutrient coatings available
  • Corrosion resistant coatings & platings available
  • Standard or custom terminations & leads
  • Mounting Configurations: pcb-mount (horizontal or vertical), custom or standard brackets or stacked configurations
  • Designed to meet CSA & UL (safety) or MIL PRF 27 (aerospace / military) requirements upon request
  • MIL PRF 27 Grade 5 & 6 encapsulation available