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Worldwide, the Sumitomo Electric Group is comprised of nearly 400 subsidiaries and affiliate companies operating in dozens of countries. The Americas are home to over 40 of these companies. Listed below are some of our major companies in the United States, organized by business segment.

Automotive

Sumitomo Electric Wiring Systems, Inc.

One of the world’s leading manufacturers of automotive wiring harnesses and harness components. Other products include high-voltage motor cables and electronic components such as center panels, electronic control units, and junction blocks.
Headquarters: Bowling Green, Kentucky

Sumitomo Electric Wiring Systems, Inc.

Sumitomo Wiring Systems (USA), Inc.

Sales of high-quality connectors and terminals for automotive electrical distribution systems. SWS-USA also manufactures several types of wiring harnesses for Tier 1 automotive suppliers.
Headquarters: Novi, Michigan

Sumitomo Wiring Systems (USA), Inc.

Sumitomo Riko America, Inc.

An affiliate of Sumitomo Electric that manufactures anti-vibration rubber products for automotive use. This includes engine mounts, body mounts, engine drivelines, exhaust isolation mountings, and body isolation parts. SRA also manufactures automotive hose products (high-pressure fuel hoses, filler neck hoses, vapor recovery tubes, etc.) and urethane sound reduction products.
Headquarters: Novi, Michigan

Sumitomo Riko America, Inc.

Infocommunications

Sumitomo Electric Device Innovations U.S.A., Inc.

Sales of optical transceivers and lasers for use in optical data communications networks in metropolitan areas or data centers. For wireless communications, sales of GaN and GaAs high-electron mobility transistors, GaAs field effect transistors, and MMIC power amplifiers.
Headquarters: San Jose, California

Sumitomo Electric Device Innovations U.S.A., Inc.

Sumitomo Electric Lightwave Corp.

Serving the ever-growing demand for optical fiber infrastructure, SEL offers a wide variety of products: fiber optic ribbon cable, ultra-high fiber count cable, air-blown fiber cabling systems, fusion splicers, pre-terminated cable assemblies, high-density splice cabinets, and more. SEL also offers engineering services and product training.
Headquarters: Raleigh, North Carolina

Sumitomo Electric Lightwave Corp.

Electronics

Judd Wire, Inc.

Design, manufacture, and sales of high-performance wire and cable for the automotive, aerospace, railway, and other industries. Specializes in the use of electron beam crosslinked thermosets for wire insulation to enhance product durability. Products offered in over 100 styles recognized by UL, CSA, or military standards.
Headquarters: Turners Falls, Massachusetts

Judd Wire, Inc.

Sumitomo Electric Interconnect Products, Inc.

Manufacture and sales of heat-shrinkable tubing for the automotive, aerospace, electronics manufacturing, transportation, and other industries. Also offers solder termination sleeves, marking systems for cable identification, and durable PTFE sealants and tapes.
Headquarters: San Marcos, California

Sumitomo Electric Interconnect Products, Inc.

Sumitomo Electric Semiconductor Materials, Inc.

Manufacture and sales of compound semiconductor substrates (GaAs, GaN, and InP wafers) for electronics manufacturing. These substrates are used in the production of optical communication devices, wireless communication devices, white LEDs, and many other end products.
Headquarters: Hillsboro, Oregon

Sumitomo Electric Semiconductor Materials, Inc.

Environment & energy

Sumitomo Electric U.S.A., Inc.

Acting as a direct sales channel for the parent company in Japan, Sumitomo Electric USA introduces newly developed technologies to diverse markets in North America. The product portfolio includes power transmission cables for utility companies, optical fiber cables for the telecommunications industry, heatsinks for the industrial market, air springs for trains, and more.
Headquarters: Torrance, California

Sumitomo Electric U.S.A., Inc.

Sumitomo Electric Wintec America, Inc.

Sales of film-insulated copper magnet wire (for automotive and other applications) and a variety of specialty products such as litz wire. Products are customized to the desired specifications of each customer.
Headquarters: Edmonton, Kentucky

Sumitomo Electric Wintec America, Inc.

Industrial materials

Engineered Sintered Components

Manufacture and sales of powdered metal parts for automotive use, such as oil pump rotors, variable valve timing components, valve train components, power steering components, sensor rings, sprockets, and pulleys. ESC is an IATF 16949:2016 certified manufacturing company.
Headquarters: Troutman, North Carolina

Engineered Sintered Components

Keystone Powdered Metal Company

Manufacture and sales of powdered metal parts for use in automotive powertrains, such as clutch components, sprockets, gears, gear carries, and bearings. KPMC also manufactures assemblies comprised of powdered metal and non-powdered metal parts.
Headquarters: St. Marys, Pennsylvania

Keystone Powdered Metal Company

Niagara Refining LLC

Manufacture of tungsten raw materials (high-purity tungsten oxide powder from tungsten ore and tungsten industrial scraps). This material is used by customers to manufacture finished tungsten products that are essential to modern life, such as machining tools and electrical contacts.
Headquarters: Buffalo, New York

Niagara Refining LLC

Sumitomo Electric Carbide, Inc.

Sales of an enormous catalog of high-precision machine tools that includes turning tools, CBN/PCD cutting tools, drilling tools, milling tools, custom-engineered tools, and laser optics.
Headquarters: Mount Prospect, Illinois

Sumitomo Electric Carbide, Inc.

Sumitomo Electric Carbide Manufacturing, Inc.

Manufacture of carbide drills, CBN/PCD cutting tools, milling cutters, and special cutters.
Headquarters: New Berlin, Wisconsin

Sumitomo Electric Carbide Manufacturing, Inc.

Sumiden Wire Products Corporation

A leading manufacturer of prestressed concrete steel strand for the construction industry. SWPC also custom-manufactures stainless steel spring wire for diverse applications, as well as ultra-smooth stainless steel wire for use in medical devices. SWPC is an expert in electroplating nickel to carbon wire substrates for a bright finish and high ductility.
Headquarters: Dickson, Tennessee

Sumiden Wire Products Corporation

Corporate

Innovation Core SEI, Inc.

North American extension of Sumitomo Electric’s R&D organization, focused on investigating new technologies in the areas of clean technology, infocommunications, semiconductors, and advanced materials. ICS sponsors research and collaborates with local tech companies.
Headquarters: San Jose, California

Innovation Core SEI, Inc.

Sumitomo Electric Finance U.S.A., Inc.

Financing for subsidiaries and affiliate companies.
Headquarters: New York City

Sumitomo Electric Finance U.S.A., Inc.

Sumitomo Electric U.S.A. Holdings, Inc.

Administrative services for subsidiaries and affiliate companies.
Headquarters: New York City

Sumitomo Electric U.S.A. Holdings, Inc.