CoilMaster
CoilMaster is a privately held South Korean manufacturer of passive electronic components — inductors, RF coils, EMC components, and transformers — selling directly to OEMs in consumer electronics, automotive, AI server, EV charging, and industrial robotics markets across an 11-office global footprint.
- Company typePrivate
- Founded1996
- HeadquartersBudapest, Hungary
- Headcount1,001–5,000
- GTM typeB2B
- OfferingHardware or Manufacturing
What CoilMaster does
CoilMaster is a South Korea-based, privately held manufacturer of passive electronic components founded in 1996, claiming the No. 1 position in Korea's coil manufacturing industry. The company produces four core product categories: inductors (coils), RF coils, EMC components (common mode filters, chip beads, signal/power line filters), and transformers (LAN, BMS, current, and planar types). Its technical differentiators include proprietary metal powder molded structures and sintering manufacturing processes that enable miniaturization (down to 1.4×1.2mm), high current handling (up to 88A), low DCR (as low as 0.16mΩ), and AEC-Q200 automotive-grade reliability, with a catalog exceeding 4,155 inductors, 697 EMC components, 487 RF coils, and 29 transformers.
CoilMaster sells directly to OEMs and electronics manufacturers through an inquiry-based B2B model, with a global footprint spanning 11 offices and R&D centers: headquarters in Iksan plus sales offices in Suwon and Ilsan (South Korea), Los Angeles (USA), Hong Kong, and Hungary, supported by manufacturing facilities in China (Zhaoqing, Wendeng) and Thailand. The customer base is segmented across consumer electronics (smartphones, tablets, TVs, wearables, SSDs), automotive electronics (infotainment, lighting, autonomous driving, xEV, in-vehicle networking including CAN FD and Ethernet), data center and AI server VRMs, EV charging and energy storage systems, industrial and humanoid robotics, and Class-D audio amplifiers.
The company generates revenue through hardware sales of passive components, with pricing determined via direct customer inquiry based on volume and specifications rather than publicly listed prices. Multi-year supply contracts are typical for its OEM relationships. CoilMaster was recognized among the Asia-Pacific Top 500 fast-growing companies and has executed a steady cadence of new product launches from 2023 through 2026 targeting AI server power delivery, robotics, EV charging, energy storage, and miniaturized mobile applications. No external funding rounds, parent company, or M&A activity is disclosed; ownership and leadership rest with CEO Cha Sang-yeop (차상엽) as representative director.
CoilMaster firmographics
Firmographics- Name
- CoilMaster
- Legal name
- (주)코일마스터
- Website
- https://coilmaster.com
- Company type
- Private
- Founded year
- 1996
- Operating status
- Operating
- Headcount range
- 1,001–5,000 employees
- Short description
- CoilMaster is a privately held South Korean manufacturer of passive electronic components — inductors, RF coils, EMC components, and transformers — selling directly to OEMs in consumer electronics, automotive, AI server, EV charging, and industrial robotics markets across an 11-office global footprint.
- Ownership category
- akta.pro rank
CoilMaster industry classification
Industry- Product category
- Passive Electronic Components
- NAICS
- Other Electrical Equipment and Component Manufacturing (3359), Electrical Equipment Manufacturing (33531)
- SIC
- Electronic Coils, Transformers & Other Inductors (3677), Electronic Components & Accessories (3670)
- akta.pro primary industry
- Inductors & Coils (Power/RF/Chokes) (HDAHANAC)
- akta.pro secondary industries
- Transformers & Magnetics (Power/Signal) (HDAHANAD), Passive Filters & RF Passives (LC Filters/Diplexers/Baluns/Attenuators) (HDAHANAG), Passive Components (Resistors, Capacitors, Inductors, Ferrites) (IMAGAJAA)
Keywords
Where CoilMaster is headquartered
LocationHeadquarters
- HQ city
- Budapest
- HQ country
- Hungary
- HQ region
- Europe
Offices9 records
Markets served
CoilMaster business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Operations, Supply Chain, Personnel, Technology or R&D
Revenue model
- Electronic Components Sales: CoilMaster generates revenue through the sale of passive electronic components including inductors, RF coils, EMC components, and transformers. Products are sold directly to manufacturers and through sales offices globally. Components are used in high-volume applications including smartphones, automotive, and industrial equipment.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | B2B component pricing through inquiry |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels4 records
CoilMaster product offering
Product offeringCore offering
CoilMaster manufactures and sells passive electronic components, including power inductors, RF coils, EMC components, and transformers. The company's products are designed for integration into consumer electronics, automotive electronics, industrial robotics, EV charging infrastructure, and data center/AI server hardware. CoilMaster is a Korea-based component manufacturer serving B2B customers across these multiple high-growth verticals.
Product overview
CoilMaster is a Korea-based manufacturer of electronic passive components with a comprehensive portfolio of four core product categories: Inductors (Coils), RF Coils, EMC Components, and Transformers. The company operates as a single unified product line manufacturer rather than a platform-plus-modules architecture. The inductor portfolio includes multiple specialized series including the MMPF Series ultra compact power inductors for mobile/wearable devices, TMMPS Series 2-in-1 sintered power inductors for VRM/server applications, CSBL Series for energy storage systems, CMMPF-V Series for ultra high current EV applications, and 2-Hole PowerBeads for robotics. The RF Coil lineup includes ceramic and air coil types. EMC Components encompass common mode filters for signal/power lines and chip beads, including automotive-specific CAN FD and Ethernet common mode chokes. Transformer offerings include Lan Transformers, BMS Transformers, Current Transformers, and Planar Transformers for EV charging and telecom applications. All products are supported by a product search tool for parametric selection, with automotive-grade products meeting AEC-Q200 standards and RoHS compliance across the portfolio.
Differentiator
Problem solved
Functional benefit
Products and services
- Power Inductors Passive magnetic components designed for power conversion and energy storage applications, supplied to OEMs and module manufacturers across consumer electronics, automotive, industrial robotics, EV charging, and data center/AI server markets.
- RF Coils Radio frequency magnetic components used for signal filtering and high-frequency applications in electronic devices, supplied to OEM and module manufacturer customers.
- EMC Components Electromagnetic compatibility suppression components designed to mitigate electromagnetic interference in electronic systems, supplied to OEMs and module manufacturers across consumer electronics, automotive, industrial, and data center applications.
- Transformers Passive magnetic components for power and signal transformation applications, supplied to OEMs and module manufacturers integrating power delivery and signal conditioning into finished electronic systems.
Quantifiable outcome
- Metal powder molding structure provides excellent EMC characteristics, reducing EMI for clean interference-free operation
- +2 more outcomes
Companies that use CoilMaster
Customer profileSegments6 records
Ideal customer profiles4 records
CoilMaster technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
CoilMaster partnerships and signals
Strategic signalScale indicators7 records
Recent moves6 records
Expansion highlights5 records
CoilMaster competitors and assessment
Company assessmentDirect peers
- Taiyo Yuden: Japanese manufacturer of inductors, EMI filters, and RF components primarily for consumer electronics, automotive, and industrial markets. Direct portfolio overlap with CoilMaster's wire-wound power inductors, chip beads, and AEC-Q200 automotive products.
- Bourns Inc. US-based manufacturer of resistive products, inductive components, circuit protection, and magnetics for automotive, industrial, and consumer markets. Comparable in automotive-grade inductors, transformers, and EMC components serving similar Tier 1 supply chains.
- Coilcraft: US-based specialty manufacturer of inductors, transformers, and RF components serving automotive, telecommunications, and industrial customers. Closest head-to-head comparable in product specialization (coil/inductor focus) and B2B OEM sales motion.
- Vishay Intertechnology: US-headquartered manufacturer of discrete semiconductors and passive components including inductors, transformers, and EMI filtering products. Comparable in product mix (inductors, transformers, EMC) and direct global B2B sales model targeting OEMs.
- Sumida Corporation: Japanese global manufacturer of inductors, transformers, and power magnetics for automotive, industrial, and consumer electronics. Highly comparable in transformer and inductor portfolio, with parallel focus on EV and automotive electronics customers.
- Pulse Electronics: Global manufacturer of magnetic components including transformers, inductors, and chokes for automotive, networking, and industrial applications. Comparable in LAN transformer, BMS transformer, and power inductor offerings that overlap with CoilMaster's transformer and AEC-Q200 product lines.
- Samsung Electro-Mechanics: Korean-headquartered passive component manufacturer (inductors, MLCCs, EMC components) serving consumer electronics, automotive, and IT applications. Most direct regional competitor with similar Korean OEM customer base and AEC-Q200 automotive-grade portfolio.
- Würth Elektronik: German manufacturer of electronic components including a broad inductor, transformer, and EMC filter portfolio. Comparable in product breadth and B2B distribution model, with strong European OEM coverage that overlaps with CoilMaster's Hungary sales office.
Broad incumbents
- TDK Corporation: Global Japanese passive component leader manufacturing inductors, transformers, EMC filters, and RF components for automotive, consumer electronics, and industrial applications. Directly comparable as a major upstream competitor across all four of CoilMaster's product categories, though at far greater scale.
- Murata Manufacturing: World's largest inductor and EMI filter manufacturer, with strong positions in smartphones, automotive, and IoT. Overlaps with CoilMaster's miniaturized power inductors, chip beads, and common mode filters targeting the same OEM customers.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights6 records
Customer concentration
CoilMaster social profiles
Digital presenceCoilMaster compliance and trust
Trust signalCompliance2 records
CoilMaster financial estimates
Financial estimateRevenue estimate
Valuation estimate
CoilMaster leadership team
Management profileNumber of profiles
Profiles1 record
CoilMaster funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
CoilMaster M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about CoilMaster
What does CoilMaster do?
CoilMaster manufactures and sells passive electronic components, including power inductors, RF coils, EMC components, and transformers. The company's products are designed for integration into consumer electronics, automotive electronics, industrial robotics, EV charging infrastructure, and data center/AI server hardware. CoilMaster is a Korea-based component manufacturer serving B2B customers across these multiple high-growth verticals.
Is CoilMaster a public or private company?
CoilMaster is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was CoilMaster founded?
CoilMaster was founded in 1996. It employs 1,001 to 5,000 people.
Where is CoilMaster based?
CoilMaster is headquartered in Budapest, Hungary, in the Europe region.
How does CoilMaster make money?
One revenue line is on record: electronic Components Sales.
Who are CoilMaster's main competitors?
Direct peers on record are Taiyo Yuden, Bourns Inc., Coilcraft, Vishay Intertechnology, Sumida Corporation, Pulse Electronics, Samsung Electro-Mechanics and Würth Elektronik. Broad incumbents are TDK Corporation and Murata Manufacturing.
Does CoilMaster have an API?
No public API is recorded for CoilMaster.
What industry is CoilMaster in?
CoilMaster's product category is Passive Electronic Components. Its primary akta.pro industry code is HDAHANAC, Inductors & Coils (Power/RF/Chokes), with a secondary code of HDAHANAD, Transformers & Magnetics (Power/Signal). Its NAICS code is 3359 and its SIC code is 3677.