- (AU) Tortech
 - Offers Toroidal transformers of all specifications and quantities, with Australian and world standards. Products include power supplies and plug packs. - A.P.W.
- Manufacturers of windings, coils, electromagnets, solenoids, and vacuum pick-up pumps.
- Adiva Technology, Inc.
- From standard through hole to ultra miniature surface mount.
- Advanced Ceramic X Corporation
- Offers chip ceramic inductors, low pass filters (LPF), and LTCC modules.
- Advanced Components Industries, Inc.
- Offers a large number of transformers and relays manufactured by Spitznagel and Gruner.
- Allied Components International
- Complete source for magnetic components, surface mount and thru hole products including chokes, inductors, air coils, ferrite beads, tunable coils, and transformers.
- Allied Controls Incorporated
- Reliable relays, timers, switches and related equipment.
- Assembly Masters, Inc.
- Manufacturer of custom toroid transformers, inductors, freestanding coils, cable assemblies, and wire harnesses. Contract manufacturing and value-added rework services available.
- Associated Components Technology, Inc.
- Manufacturer of inductors, transformers, coils, ferrite beads and other magnetic components for the electronics industry.
- ATC-Frost Magnetics Inc
- Manufactures standard and custom transformers, inductors, ballasts, and toroids.
- Best Windings Ltd
- Designs and manufactures transformers and chokes for telecommunications applications.
- Beta Transformer Technology Corporation
- Transformers, inductors, and custom magnetics.
- BG Laboratories
- Standard and custom transformers and inductors of every type. Quick turn around, and top flight engineering.
- BH Electronics
- Supplier of magnetics, transformers, and inductors. Contains a catalogue of products, and forms for requesting quotes and samples.
- Central Technologies
- Manufacturer of industry standard inductors, chokes, and coils.
- Chilisin Electronics Singapore Pte Ltd
- Specialises in inductors, magnetic components for electronics circuits. Range of coils, chokes, chips, beads, EMI suppressors and surface mount.
- Chung Hing Industry Co, Ltd
- Maker of coils, chokes, transformers, and inductors.
- ClareREMtech
- Manufacturers of magnetics, modem couplers, reed relays, surge arrester protection products and other electronic component manufacturing.
- Climax Industrial Co Ltd.
- Coilcraft, Inc.
- Manufacturer of electronic coils, inductors, transformers, EMI/RFI filters. Site contains full technical data, forms for requesting technical support, samples, pricing and product literature.
- Coilmaster Electronics Co., Ltd.
- Suppliers of inductors, including SMT power, chip, wire wound chip, ceramic chip, and multiplayer chip inductors. Also supplying SMT toroidal inductors, line, and EMI suppression filters.
- Coils Electronic Co.,Ltd.
- Production and sales of coils, SMD, and other passive components.
- Continental Industries
- Solid state relays and power modules.
- Cortec Enterprises
- Automated manufacturer of custom toroids, chokes, and standard toroids.
- Coto Technology
- Manufactures reed relays and switches for automatic test equipment(ATE), instrumentation, data acquisition, process control, medical, security, and other applications.
- Crovisa
- Transformers and autotransformers manufacturer from 0,35 VA to 25kVA).
- Custom Made Transformers
- Custom Transformers, Chokes, Reactors, Rectifier Assemblies, Capacitors, and high voltage DC power Supplies. 24 Hr Tech Support to get your station back on the air.
- Custom Magnetics Inc.
- Custom coils and transformers including the R-Core transformer technology.
- Datatronics, Inc.
- Manufacturer of transformers, inductors, coils, chokes, and custom magnetics.
- Detroit Coil Company
- Manufacturer of industrial grade, AC & DC, laminated solenoids, DC tubular solenoids and pilot valve operators.
- Diemen HR
- Manufacturer of flyback transformers for TV and computer monitor repair. Offers large range of spare-parts for any brand and model sold internationally.
- EK Magnetics
- Manufactures surface mount/through-hole transformers and inductors, common mode chokes, air coils, toroids, balun, solenoids, and magnetics components for the power and telecom industry.
- Electrical Manufacturing and Coil Winding Association (EMCWA)
- Provides educational development and technical communications for the coil winding and electrical manufactuing industries.
- Electro Assemblies Corporation
- Manufacturer of wound magnetic components, including laminated and toroidal transformers and inductors, ferrite cores and RF coils.
- Enbray Contactors
- Manufacturer of contactors and fusegear products.
- Fanox
- Manufacturers of electronic relays.
- Ferronics Incorporated
- Filtran
- Transformers and inductors for telecommunications and power applications, magnetic components for E1, T1, T3, ISDN and HDSL.
- Flat Transformer Technology Corporation
- Technical and sales information for efficient power transformation devices. Includes detailed application notes and technical papers.
- Galaxy Transformer
- Manufacturer of custom magnetics including transformers, coils, inductors, chokes, etc.
- Gang Song Electronics Co., Ltd.
- Manufacturer of power inductors, chip inductors, and chock coils.
- Global Components and Controls
- Manufactures electromechanical and reed relays.
- Gowanda Electronics
- Manufacturer of magnetic electronic components, including chokes, inductors, and transformers.
- Guardian Electric Manufacturing Company
- Manufacturing a wide variety of solenoids, relays, switches and control grips for military, aerospace, commercial, industrial and automotive applications.
- Hasco Components International
- Manufacturers of reed switches, reed relays, electromechinal relays.
- Hitran Corporation
- Manufacturer of dry type transformers, inductors, reactors, custom magnetics, etc.
- Inductive Technologies
- Manufacturer of surface mount transformers and inductors, common mode chokes, magnetics and coils, and more.
- Induktor GmbH
- Manufacturer of inductive components.
- Integrity Technology Corporation
- Manufactures and distributes transformers, inductors, coils, and ceramic resonators.
- Intersol Industries, Inc.
- Design and manufacturer of solenoids.
- Johnson Electric Coil
- Designer and manufacturer of custom magnetics including, three phase, single phase, isolation, and high voltage transformers, autotransformers, and more.
- Kaifa O&M Components Division
- Supplier of air coils, chokes, toroids, balun coils, filters, and surface mount inductors. Wire windings and precision assembly service available.
- Lightech Electronics Industries, Ltd.
- Manufacturer of small electronic transformers for the lighting industry.
- LTCC
- Services include training, consulting, investigations, 3D RF-Modelling system, and development wireless applications.
- Mag Layers USA
- Manufactures a full line of surface mount multilayer and wound, inductors and ferrite beads.
- Magnecraft & Struthers-Dunn
- Manufacturer and provider of quality relay products.
- Magnespec, Inc.
- Manufacturer of transformers and inductors for military, aerospace, industrial, and commercial applications.
- MCI Transformer
- Specialising in magnetic component manufacturing.
- Meder electronic
- Reed-relays and reed-sensors.
- Micrometals Inc.
- Iron powder core technology; selection of shapes, sizes, and material grades for application from power conversion and line filters.
- Midcom, Inc.
- Manufactures transformers and other magnetic components for telecommunications and low power applications.
- Million Spot Ltd.
- Miniature relay and electro-magnetic relay manufacturer.
- Mitchell Electronics Transformers
- Manufactures and designs transformers, coils, inductors, toroids, and related products.
- NDE
- Offers coil winding solutions for the aeronautical, automotive, scientific, and manufacturing sectors.
- Nuvotem Ireland
- Offers c ustom designed toroidal magnetic components Transformer, Choke, Inductor, Toroid, and Toroidal.
- Pacific Resistor Company
- Manufacturer of wire wound surface mount, chassis, axial lead, radial lead, power, precision or custom resistors.
- Pacific Transformer Corp.
- Custom transformers, inductors and coils.
- Payton Group
- Designing and manufacturing of planar transformers in different power levels; from 5W-20KW and a frequency of 20KHz-2MHz.
- PCA Electronics
- Manufacturers of electromagnetic components and custom magnetics specialists.
- Pickering Reed Relays
- Pickering Electronics are reed relay leaders and manufactures of reed relays for high quality instrumentation and ate.
- Piconics Incorporated
- Thin and thick film catalogue and inductors catalogue.
- Plasma Technics Inc.
- Designer and manufacturer of commercial quality high voltage transformer products.
- Prejection Electronic Coil Industrial Corp.
- Manufacturer of voice coils, electronic coils, precision coils, induction coils, and solenoid coils.
- Prem Magnetics, Inc
- Manufacturer of custom and standard product power transformers, telephony transformers, display magnetics and inductors.
- Rhombus Industries Inc.
- Manufacturer of magnetic products like transformers, inductors, filters and delay lines.
- Sag Harbor Industries
- Manufacturers of electrical and solenoid coils, transformers, chokes, printed circuit board assemblies, and electromagnetic lock and control devices.
- Schott Corporation
- Transformers, inductors, and magnetic components.
- Shafer Magnetic Components
- Shih Hsing Co., Ltd.
- Manfuactures AC/DC solenoids.
- Shyen Eu Machinery
- Manufacturer of transformers, core plate, coils, and various electronic components.
- Sigma Electronics
- Designers and manufacturers of custom crafted transformers, toroids, coils, inductors, reactors, inverters, converters, and chokes.
- Song Chuan
- Manufacturer of quality relays.
- Spin Magnetics
- Speciality transformers and inductors.
- Standex Electronics
- Manufactures a variety of inductor, choke, toroid, magnetic proximity, reed relay, and reed switch devices.
- Stetco Inc.
- Surface mount coils and transformers.
- Sumida Electric Co., Ltd.
- Manufacturing and marketing of coils.
- Sun Transformer
- Custom transformers and inductors for many applications, including avionics, medical, and industrial markets. ISO 9001 certified with design and applications assistance available.
- TBS Electronics
- Sinewave inverters, toroidal transformers and more.
- Toroid Corporation of Marylands
- Standard and custom designs of toroidal power transformers.
- Toroidal Scientific Enterprise
- Manufacturer of toroidal transformers for amplifiers and ballasts.
- Tracy Minntronix Corporation
- Custom and standard manufacture of magnetic telecommunication devices.
- Transera Electronics, Inc.
- Manufacturer of transformers, ignition coils, inductors, automotive wiring harnesses, and more.
- Transtek Magnetics
- Offers transformers, inductors, and coils.
- Tri-Tech, LLC.
- Manufactures custom coils, solenoids, thermoplastic insert moulded and encapsulated components, and electro-mechanical assemblies.
- Trombetta Motion Technologies
- Manufactures high-quality standard and custom solenoids and linear actuators.
- Wilco Corporation
- Manufactures inductors, chokes, and coils. Specialises in surface mount power, surface mount chip, and ferritedrum core inductors.
- XFMRS, Inc.
- Makes magnetic components.
- Zettler Components (2)
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