Ring Cores Tape Cores Cut Cores HFC Cores – High Frequency Choke Cores "A-Core" "C-I Core" Electrical Laminations Motor Laminations Assembled Motor Stacks Three Dimensional Stamping Thin Gauge Stamping I and Bar Strips Custom Annealing Contract Manufacturing GFCI and ALCI Coils New Materials       Available Material Thickness Frequency Range Relative Core Cost Bobbin Cost Relative Assembly Cost Tooling Cost Application Advantage Disadvantage EE/EI/F Lamination 6-25 mil 50-400 Hz 1 Low 3 Very High Power X-formers, Current X-formers, Inductors, Chokes Inexpensive material and parts, better control of tight tolerance Limited thickness, expensive asssembly and tooling Shell Type Double C Core 1-14 mil 50-20 KHz 4 High 2 Fair Power X-formers, Current X-formers, Inductors, Chokes Inexpensive tooling, easy assembly, available in many sizes More expensive than laminations, wide tolerance C-I Core 1-14 mil 50-20 KHz 3 Low or none (can wind directly on "I" bar) 1 Low Power X-formers, Current X-formers, Inductors, Chokes Inexpensive tooling, available in many sizes, easy assembly, wind directly on "I" bar Wider Tolerance than lamination but better control than Shell Type C Core "C-I Core" Page 1 | 2 | 3 | 4 | 5 | 6