toroidal inductor common mode choke ring wired core

Toroidal Inductors are used for applications that include current sense transformers, common mode inductors, switching regulator
inductors, input filter inductors, and more. These inductors provide excellent value — they are generally smaller in size and cost
less than other inductors.

Toroidal Inductors provide a number of advantages over other inductor varieties, which include:
Compact Size — The smaller size of Toroidal Inductors allows for excellent efficiency while maintaining top level
performance.Lower Cost — With smaller sizes that use less raw materials, Toroidal Inductors are a highly economical choice.
Efficient Design — Inductor designers can achieve shorter length of turn with smaller-sized Toroidal Inductors using less cooper wire and with no bobbin as with E-core designs.