Business & Technology

Sumida is a global leader in the design and manufacture of coil-related components and modules. Specialising in custom design solutions, Sumida’s products are used in a wide range of applications from consumer electronic devices through to home appliances, automotive electronics, green energy solutions, industrial electronics and medical healthcare devices and equipment.

Our core product scope includes components and modules such as power inductors & transformers, automotive keyless antennas, xenon ignitor modules, mobile communications equipment, radio frequency identification tags (RFID), power inverters for solar power generators and components for industrial lighting solutions. In addition, we also provide the complimentary products and services such as magnetic materials, ceramics, flexible connectors and electronic manufacturing services (EMS).

With over 60 years history in Asia and 80 years in Europe, our expertise in coil-related manufacturing, as well as technical design, allows us to offer our customers both customised design solutions as well as off-the-shelf products. In addition, our comprehensive manufacturing capabilities and footprint allow us to flexibly adjust product volumes and locations as required while maintaining consistent high-quality standards. This is why we pride ourselves on our ability to cultivate long-term relationships with our customers built on trust.

Corporate Video

See our company structure chart.

The following sections give a more detailed explanation of our business in each of our key regions.




North & South America

Core TechnologiesR&D ORGANIZATION
With our history amongst Japanese coil manufacturers as a first mover in expanding production and business divisions overseas, Sumida has continued to expand its presence across the globe whilst promoting global integration and knowledge sharing within the various R&D and technology departments to support our growing customer base.

Speed, market insight and efficiency are our fundamental operating principles and our mission is to develop and offer new products and services to the market on a local-for-local basis.

Sumida's development and technical activities are focused both regionally and by core expertise centres. With extensive engineering development centres in Japan, China, Europe and North & South America we are ready to support any customer requirements. The ability to engage our engineering experts with our customers locally in order to fully understand and provide technical assistance for the development of coil related products is our big advantage.


Our global development and technology organization is based on a number of complex technologies, which we refer to as Technology Convergence. Through this we continue to establish ourselves as a technology-driven innovative design and manufacture company.

The following table shows an overview of the key technologies we have under our capabilities portfolio. 

MATERIAL Magnetic Metal, Capacitor Ceramic, MnZn Ferrite, NiZn Ferrite, Metal Powder Cores, Soft Magnetic Composites, Flexible Metal, Piezo Ceramics
DESIGN & APPLICATION  Product design, Magnetic Simulation, Circuit Simulation, Stress Simulation, Circuit Design, PCB Layout
MACHINE & PROCESS  Machine/ Equipment development, Laser sealing, Laser Blasting, Laser Peeling
TOOLING Tooling design, Tooling processing, Mold Flow Simulation
WINDING (core)  Alfa Winding, Edgewise Winding, Litz Wire Winding, Orthocyclic Winding, Toroid Winding, Air Coils
PRECISE PROCESSING  Injection Molding, Insert Molding, Low-P Overmolding, Overmolding, Pin draw Molding, Metal Injection Molding, Vacuum Potting, Plasma treatment, Ferrite Injection Molding, Coating, Stamping, Electro-Plating
CONNECTION  Soldering, Arc Welding, Laser Welding, Pulse Heat Welding, Resistance Welding, Ultra Sonic Welding, Pressfit Pin (pin to PCB), Crimping, Pinning, Board to Board Connection
EVALUATION & TESTING  Reliability Test, Transmission X-ray & CT Scan, SEM/EDX, Ion Chromatography, Thermal Analysis, Differential Thermographic / DTA, Full Automatic Scanning Microscope, Inductive Coupled Plasma, Permeability Measurement over Temp, Laser Diffraction Meter