West Coast Magnetics designs best in class transformers and inductors and provides manufacturing services for electronic products with high engineering content. Our active R&D has resulted in new patented technology and innovative designs for power and RF magnetic components in many applications. We will continually redefine what is possible with magnetic technology. Headquartered in the San Francisco Bay Area, WCM manufactures and designs custom engineered magnetic components, and provides manufacturing services for companies competing in the global OEM space. Our manufacturing facilities are in Stockton, California and in Tecate, Mexico.




Weyman Lundquist/ President

Recognized as one of the leading designers in the field of magnetics, Weyman is dedicated to advancing the technology of power magnetic design. A significant portion of his award-winning work has focused on predicting and reducing winding losses in power inductors and transformers.

In partnership with researchers at the Thayer School of Engineering at Dartmouth, Weyman has helped advance the understanding of power magnetics technology. These discoveries have resulted in improved magnetic devices for the power electronics industry.

Weyman is an active lecturer and instructor as well as an avid sportsman. He holds a BA from Dartmouth with a major in Engineering, MSME from the University of California, Berkeley and an MS Engineering Management from Stanford University.


Sergio Zurita/ Production Engineer

bio coming soon


David Harizal/ Design Engineer

Bio Coming Soon…


Mary Clark/ Research & Development Engineer

Bio Coming soon!


Vivien Yang/ Quality Control Manager

Vivien is a degreed quality professional who has led the company from a basic quality management system to full ISO9001/2008 and ISO14385 certification at both facilities. Vivien is also a vetted designer of transformers and inductors at SMPS frequencies with many successful designs to her credit. Vivien is fluent in Mandarin Chinese and is responsible for international vendor qualification.

Vivien holds a BS in Mechanical Engineering and an MS in Industrial Technology from California State University, Fresno.


Elizabeth Menchaca/ Sales Manager

Elizabeth has 20 years of experience in sales and customer service. As the leader of WCM’s sales team, Elizabeth works hard to ensure a consistent and high level of service across our customer base. Her key areas of focus is improving responsiveness. Elizabeth is near completion of a 4 year business degree from an accredited college


Melissa Gonzales/ Sales Account Representative

Bio coming soon


Joseph Smith/ Sales Account Representative

Bio Coming Soon..


Lisa Reyes/ Production Manager

With more than 20 years of experience building transformers and inductors of all types, Lisa is responsible for leading the production team at WCM. In addition to scheduling and expediting, Lisa is responsible for the Quality System improvements, meet or exceed our quality system goals. Her efforts help us improve productivity, reduce lead time and lower costs.


Toni Jimenez/ Purchasing Manager

With more than 30 years of experience in procurement within the magnetics and passives industry, Toni is our most experienced employee. As the department head, Toni wears many hats; a few of the most important ones include improvements to our MRP system, vendor qualification, and process workflow improvements supporting our Quality Management System.


  • Automated and manual torodial winding
  • Automated and manual bobbin and coil from winding
  • Soldering and Termination
  • Assembly
  • Potting/impregnation
  • Coating
  • Baking
  • Solid wire, litz wire, copper foil
  • Coils made from bondable wire
  • Tuned RF inductors to +/- 2% tolerance
  • Process validation, risk assessment and PFMEA
  • Rapid prototype services
  • Turnkey assembly, validation, test, packing and shipping
  • Qualified vendors: cable & harnessing, PCB/PCA, chassis, machined parts, injection moulding
  • EDI and inventory management
  • Linear, swithing power and RF transformers and inductors
  • Frequency: 60Hz to 100 MHz
  • Power (to 100kW):
    Isolation transformers, SMPS transformers, buck/boost inductors, resonant inductors, line reactors, RF transformers, gate drive transformers, current sense transformers
  • RF and filtering:
    Common mode chokes, RF and resonant circut inductors
  • UL/CSA/VDE/TUV compliance
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