Founded in 1945 as a custom coil maker for the television set manufacturers, Coilcraft is a privately held company based in Cary, IL. Today they produce inductors for telecommunications, computers, instrumentation and consumer electronics. Many are standard, off-the-shelf products, but most are still custom designed to meet customers' specific requirements.

The types of products manufactured by Coilcraft include RF Inductors, Power Inductors, Chip Inductors, Shielded Power Inductors, Spring Air Core Inductors, Unshielded Power Inductors, Wideband RF Transformers, High Current Power Inductors, RFID Transponder Coils, Backlight Power Inductors, xDSL Magnetics, EMI/RFI Filters, ADSL Transformers, Tip/Ring Filters, HDSL2 Transformers, Signal Line/LC Filters, HDSL Transformers, Surface Mount Power Inductors, Current Sensors, Leaded Power Inductors, Mag Amps, Common Mode Line Chokes, Planar Magnetics, Power over Ethernet Transformers, Miniature SMT Transformers, Flyback Transformers, SMT Gate Driver Transformers, Base/Gate Driver Transformers, Power Factor Controller Magnetics, CCFL Transformers, and Custom Transformers.

Coilcraft is product portfolio consists of EMI/RFI devices, inductors, current sensors, transformers, etc..