Reliable, Innovative Designs

We design and build our inductors and chokes with state-of-the-art materials including powdered metals, ferrites, amorphous metals and silicon & nickel iron materials. In-house gapping capability allows us to meet specific inductance specifications and our collaborative approach to design allows us to deliver applications with results in optimal performance in the most efficient package.

Example Types of DC & AC Inductors, Chokes & Reactors:

  • Encapsulated / Molded / Potted
  • High Power, High Current
  • Output Filter
  • Differential & Common Mode
  • Water-cooled
  • High Voltage (to 25kV)
  • Air Core Power
  • Foil-Wound
  • Buck-boost
  • Toroidal
  • Noise Suppression
  • Resonant Tank
  • Swinging Output
  • Tunable
  • Magnetic Regulator
  • 3 Phase


Recent Work

  • Test Load Inductor, 3 Phase, 100uH @ 800Arms (EC Custom Model 221048)
    - 800A will be applied for 20 sec. - Built with copper foil windings, shunt steel and custom mounting brackets - Overall dimensions: 18"W x 10"D x 15.75"H
  • AC Filter Inductor 200uH (EC Custom Model 220047)
    Used to filter the switching harmonics from the inverter Minimum Full Load Inductance: 200uH Nominal Line Current: 50A RMS Max Applied Voltage: 600V Line Frequency: 60Hz Current Ripple Frequency: 40kHz Max Pk-Pk Ripple Current: 20A Max Ambient Temperature: 65C Hipot Test: 2200VAC / 60Hz / 60Sec. Insulation Class: Class B Minimum Fully sealed with Low Viscosity Epoxy
  • Differential Mode Inductor 108uH (EC Custom Model 218028)
    Edge wound with MW-36C Rectangular wire 108uH @ 60A 1Hz - 50/60Hz Ferrite Core
  • Low Frequency Bypass Inductor 1.8mH, 60Hz with harmonics (EC Custom Model 217079)
    Used as a component of an LCL filter on the output of a 3 ph grid-tied inverter. This inductor serves as a shunt for low frequency current to reduce losses in the damping resistor. - Inductance: 1.80mH +/-10% - Line Voltage, rms: 480V +/-10% - Switching Frequency: 5-10kHz - Rated Current @ 60Hz: 4.5A - Harmonic 1: 400mA @ 5kHz - Harmonic 2: 50mA @ 10kHz - Dielectric Strength: 3000Vac, 2s - Chassis Mountable; Terminal Block for electrical connections - Metglas Core
  • DC Inductor, 30uH @200Adc, with 5Apk-pk @20kHz Ripple (EC Custom Model 220011)
    Used to limit the inrush of fault currents in DC power electronic systems - Operating voltage: 800VDC - Ambient operating temp: -30C to +50C - Amorphous Alloy Core Material - Approx. dimensions: 5.25”H x 4.00”W x 5.25”D - Approx. weight: 9.25Lbs
  • High Current DC Filter Inductor with 1kHz Ripple (EC Custom Model 210022)
    These inductors are used in a renewable energy application. Rated 620Adc, 1.5mH designed for 1kHz ripple current, they consist of 40mil copper foil windings, 10" wide with integral ventilation slots assembled on 26M19 electrical grade steel cores. High temperature, Class H (180C) insulation system. Heavy duty 1105HTC vacuum-varnish encapsulant for harsh environment. Total weight approx 520lbs.
  • High Current AC Inductor - Wind Farm Application
    This unique, custom AC inductor is rated 51uH, 620A, 50/60 Hz with high harmonic content (ripple); 2260Apk, 3750V hipot (isolation). Constructed of dual 25mil copper foil (5.5" wide) windings assembled onto "Mega Flux" distributed gap core blocks. Surge tested, 5 pulses, Ag = 5mV/sec min. Used for energy storage purposes in a large-scale wind-farm regulation plant.
  • Encapsulated 3ph DC Inductor (256uH, 48Adc) for DC-DC converter application (Model 215023)
    Three single-phase custom inductors each rated 256uH, 48Adc with 50App ripple at 8kHz. Each inductor is constructed of 0.010 copper foil wound on an AMCC-50 amorphous metal core using Class H (180C) insulation. Encapsulated/casted in thermally conductive epoxy with conductive filler, contained within a partial aluminum housing with integral mounting bracket.
  • 3ph Water-Cooled Inductor
    This custom 3ph water-cooled inductor boasts 70uH, 220A, 1600Hz Foil Wound on Ferrite Cores, 20A Ripple @ 20kHz, Copper Tube Cooling Cast in Silicone
  • AC Inductor
    35uH, 300A, 10kHz Litz Wire Wound on Multiple Ferrite Toroids
  • Common Mode Inductor
    80uH, 150A, 300Hz Tape Wound C-Core, Open Style, 4 Hole Chassis Mount
  • Output Filter Inductor
    Amorphous Alloy C-Cores, 220C Insulation, Foil-Wound. 50uH, 75A, 100 KHz.
  • Combination Differential + Common Mode
    DM 120uH, CM 300uH, 100A; 400Hz Edge Wound, Tape Wound C-Core, Open Style, 4 Hole Chassis Mount
  • AC Inductor
    410uH, 72A, 5 kHz Ferrite Core, Litz Wound, Terminal Block Terminations, for Ozone Generation

Advanced Manufacturing Capability

Each unit is assembled in-house with care and precision.

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DC Inductors, Chokes & AC 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