3 Phase Toroidal Magnetic Choke Coil EMI Chokes Common Mode Chokes

Through-hole ring core Coil Filter Toroidal Common Mode Chokes inductor PCB Base For RFI Suppression
Through-hole Common Mode Choke coils is an inductor used to block higher-frequency while passing direct current (DC) and lower-frequencies of alternating current (AC) in an electrical circuit. A choke usually consists of a coil of insulated wire often wound on a magnetic core, although some consist of a doughnut-shaped "bead" of ferrite material strung on a wire.

The choke's impedance increases with frequency. Its low electrical resistance passes both AC and DC with little power loss, but its reactance limits the amount of AC passed.The above is about choke coils introduction
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.