West Coast Magnetics

What West Coast Magnetics does

West Coast Magnetics (WCM) is a privately held, founder-led US manufacturer of custom magnetic components and RF filters, operating from Stockton, California (engineering, prototyping, and mid-scale production) and Tecate, Mexico (high-volume production). The company designs and builds transformers, inductors, common mode chokes, and the patented WCM700 series multichannel RF filters, covering frequencies from 60 Hz to 100 MHz and power levels up to 10 kW, using ferrite, iron powder, silicon steel laminations, kool mu, MPP, and nano-crystalline core materials. Differentiated technologies include Shaped Foil winding for low-loss power inductors, low-loss SMPS winding designs, isolated RF power transformers, and narrow-band notch filters tuned for 13.56 MHz semiconductor process frequencies; the portfolio is protected by at least four registered US patents with additional pending applications.

The business is a direct, quote-based B2B custom design and contract manufacturer serving OEM engineering and procurement teams in medical devices, semiconductor manufacturing equipment, military and aerospace, communications, test and measurement, and industrial markets. Named customers include Boston Scientific, Applied Materials, LAM Research, Agilent Technologies, HP, and Lockheed Martin. Revenue mechanics combine one-time custom design-build projects, recurring production runs scaling to 50,000 units per month, hardware sales of RF filter assemblies and design kits, and electronic manufacturing services (box build, PCB assembly, test, burn-in, and potting). WCM holds ISO 9001:2015 and ISO 13485 certifications at both facilities, ITAR registration in Stockton, and RoHS and IPC 610/620 compliance, supporting qualification into regulated medical and defense programs. Distribution is direct-only with no channel partners; the company invests in technical content marketing, APEC conference presence, and PSMA/PMIC industry memberships. The company has grown organically from 30 employees in 2013 to over 130 today, backed by a research collaboration with Dartmouth Thayer School and a founder-CEO with degrees from Dartmouth, UC Berkeley, and Stanford.

Name

West Coast Magnetics

Legal name

West Coast Magnetics

Website

https://wcmagnetics.com

Company type

Private

Founded year

1993

Operating status

Operating

Headcount range

101–250 employees

Short description

West Coast Magnetics is a US-based, privately held custom designer and manufacturer of magnetic components (transformers, inductors, common mode chokes) and patented RF filters serving OEM customers in medical, semiconductor, military/aerospace, communications, and test and measurement markets.

Ownership category

akta.pro rank

Product category

Custom Magnetic Components

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311), Electrical Equipment Manufacturing (33531)

SIC

Electronic Coils, Transformers & Other Inductors (3677), Power, Distribution & Specialty Transformers (3612)

akta.pro primary industry

Transformers & Magnetics (Power/Signal) (HDAHANAD)

akta.pro secondary industries

Inductors & Coils (Power/RF/Chokes) (HDAHANAC), RF MEMS & Resonators (SAW/BAW/Filters/Timing) (HDAHALAI)

Keywords

• Custom magnetic components
• Power transformers
• Power inductors
• RF filters
• Electronic manufacturing services

Headquarters

HQ city

Stockton

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Technology or R&D, Supply Chain, Marketing or Sales

Revenue model

1. Custom Magnetic Components: Design and manufacture of custom transformers, inductors, and common mode chokes. Revenue is project-based with custom quotes for each application. Covers power levels up to 10 kW and frequencies from 60Hz to 100 MHz.
2. RF Filter Assemblies: Sale of RF filter products including WCM700 series multichannel filters for semiconductor processing equipment and other high-power applications.
3. Electronic Manufacturing Services: Box build and electronic assembly services for customers requiring complete system manufacturing, testing, and integration. Includes PCB assembly, mechanical assembly, burn-in, thermal cycling, potting and coating.
4. Design Kits: Sale of ferrite core and bobbin design kits for customers who prefer to wind their own transformers and inductors. Includes WCM410 and WCM420 series kits.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels7 records

Core offering

West Coast Magnetics designs and manufactures custom magnetic components — transformers, inductors, and common mode chokes — for power levels up to 10 kW and frequencies from 60 Hz to 100 MHz. The company also produces multi-channel RF filters (WCM700 series) tuned for narrow-band impedance at 13.56 MHz, and offers electronic manufacturing services including PCB assembly, mechanical assembly, burn-in, and thermal cycling. All products are custom-engineered to customer specifications and supported from prototype through high-volume production.

Product overview

West Coast Magnetics is a custom transformer and inductor manufacturer offering a portfolio of magnetic components (including Switch Mode Transformers, Current Sense Transformers, Isolation Transformers, High Voltage Transformers, 50/60 Hz Linear Transformers, Power Inductors, Resonant Circuit Inductors, RF Inductors, Bonded Coils, and Common Mode Chokes) and RF Filters (WCM700 series). The company also provides Design Kits for custom winding and Electronic Manufacturing Services for complete box-build assembly. All products are custom-engineered to customer specifications with power levels ranging from milliwatts to 10 kW and frequencies from 60 Hz to 100 MHz.

Differentiator

Problem solved

Functional benefit

Brands

• WCM700 Series: Multi-channel RF filters tuned for narrow-band impedance at 13.56 MHz, engineered to handle high current loads in compact, efficient packages. Covered by patents 11,183,985 and 11,831,290

Products and services

• Custom Transformers

Quantifiable outcome

• 500+ successful designs for medical device industry, serving 30 key players
• +4 more outcomes

Named customers7 records

Segments6 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Three partnerships are on record, tiered minor and core.

• Power Sources Manufacturers Association (PSMA)minorOthersIndustry membership organization for power conversion technology companies. Provides networking, standards development, and industry collaboration opportunities for power electronics manufacturers.
• Power Management Integration Center (PMIC)minorOthersIndustry association focused on power management technology. Partnership provides research collaboration and industry networking opportunities for magnetics and power electronics.
• Dartmouth Thayer School of EngineeringcoreStrategic or Co-development PartnerResearch partnership with Professor Charles Sullivan's team at Dartmouth College. Joint research on power magnetics technology has resulted in improved magnetic device designs for the power electronics industry. Discoveries from this collaboration have advanced the understanding of winding losses and high-frequency transformer and inductor design.

Scale indicators8 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• Coilcraft: US-headquartered custom magnetics manufacturer offering RF inductors, power inductors, transformers, and chokes for similar OEM customers in communications, medical, and industrial markets. Direct overlap in custom-engineered inductor and transformer product lines.
• Pulse Electronics (Yageo Group): Custom magnetics and RF components manufacturer serving communications, computing, industrial, and aerospace markets. Comparable in offering transformers, inductors, and chokes for OEM customers, now part of global passive component giant Yageo.
• Premier Magnetics: US-based custom magnetics manufacturer focused on transformers and inductors for OEM customers in industrial, telecom, and power electronics. Similar size and custom-engineering profile.
• Bourns, Inc. Privately held US manufacturer of custom and standard magnetics, circuit protection, and resistive products. Comparable in custom transformer/inductor design for industrial, medical, and aerospace/defense OEMs.
• Triad Magnetics: US-based custom magnetics manufacturer producing transformers, inductors, and chokes for audio, power, and medical applications. Closely comparable in product mix and custom-engineering go-to-market.
• Hammond Manufacturing: Manufacturer of standard and custom transformers, inductors, and related magnetics serving industrial, electronics, and power conversion customers. Comparable scope in custom magnetics engineering and OEM supply model.
• Würth Elektronik: German-headquartered passive components manufacturer with a broad magnetics catalog (transformers, inductors, chokes) and significant custom magnetics capabilities. Directly comparable in serving industrial, medical, and power electronics OEMs.

Broad incumbents

• TDK Corporation: Global passive components and magnetics giant offering a broad portfolio of transformers, inductors, chokes, and RF components. Significantly larger and broader than West Coast Magnetics, but directly competes for the same OEM sockets across all of WCM's verticals.
• Vishay Intertechnology: Large US-listed manufacturer of discrete semiconductors and passive components, including inductors, transformers, and magnetics for industrial, automotive, and military markets. Overlaps with West Coast Magnetics in magnetics product lines and customer base.
• Murata Manufacturing: Japanese global leader in passive electronic components, including inductors, EMI filters, and RF components. Competes with West Coast Magnetics in RF filter assemblies for semiconductor and industrial OEMs, but at materially larger scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/west.coast.magnetics.2016
• LinkedInlinkedin.com/company/west-coast-magnetics

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles20 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about West Coast Magnetics