Capabilities Electromagnetic Engineering
Design & Prototyping Services
Custom Avionics, Aerospace, &
Medical Power Transformers
Custom High Frequency
Custom Ferro Constant
Voltage Transformers
Custom SMT/SMD
Transformers & Inductors
Custom Low-Profile Planar
Transformers & Inductors
Assembly Services
ULOur USA manufactured
transformers and inductors
meet UL insulation class,
130(B); 180(H); 200(N)
or 220(R)
Center for Advanced Manufacturing Puget Sound Electronetics is a Nothwest Center CompanyCompany
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Custom Low-Profile Planar Transformers & Inductors

Electronetics deploys this relatively new construction technique to design custom planar transformers and inductors with extremely low profiles. These components are ideal for applications with space or height restrictions, such as mobile electronics.

We build stand-alone magnetics and can also consult on designs to seamlessly integrate the core and coils into your printed circuit board. Pros and cons of planar magnetics are:

  • Very low profile
  • Excellent repeatability from unit to unit
  • Simple construction increases volume producibility
  • Especially suitable for higher operating frequencies
  • Higher cost of materials
  • Not suitable in complex coil configurations
  • Limited turns ratio options
  • Limited core types and sizes limit design flexibility

Planar Transformers  · Planar Inductors  · Capabilities

Planar Transformers


Foil Winding
PWB Winding

Spiral Winding Technique

Primary Voltage Range

Up to 1,000V

Operating Frequency

From 5 kHz to 1 MHz

Secondary Voltage Range

To Customer Requirements

Output Power Rating

Up to 5kVA


Flying Leads
PCB Pins

Quick Disconnect Terminals

Solder Lugs

Thru-Hole Bobbin Terminal


Up to 80% or better

Effective Design Options

Managing manufacturing cost with unique custom packaging design

Planar Inductors

Frequency Range

From 5 kHz to 1 MHz

Power Rating

To Customer Requirements



We can make custom packaging designs to reduce manufacturing cost or reduce height.

Order Quantity

No order is too small or too large

Typical Lead Time

Lead time depends on customer requirements and scope

Quality Assurance

100% HiPot Testing
100% Parametric Acceptance Testing

100% Visual Inspection

Continuous Process Improvement

D1-9000 Avionics Quality Systems

In-process inspections

ISO quality standards and procedures

Test Results are captured and available as part of the documentation

UL 5506 Flammability Standard construction materials

UL Listed Insulation Systems

Electronetics, LLC | Innovative Custom Magnetic