RF filters are electronic components that are used to allow or prevent selected signals or frequencies in order to eliminate noise or pass through of unwanted signals.

Magnetically shielded inductors minimize EMI while balancing small size with low DCR and high current ratings. Perfect as power chokes and for eliminating noise in power supplies in automotive, commercial, industrial, and high-reliability designs.

In an unshielded inductor, some of the magnetic flux field is radiated outside. ... If the DCR is the same for both the shielded and unshielded inductors, then this implies that the inductors utilize the same wire and winding turns. The shielded inductor should have a higher inductance value than the unshielded one.

A chip inductor is usually available in a high frequency; multi-layer form and feature a low-loss ceramic, monolithic body with metal electrodes of high conductivity enclosed within. Overall, it aids in achieving optimal performance in catching high frequency signals.

These beads are ferrite bead inductors fabricated in the shape of chips which support surface mounting (SMD).

A power inductor is used in a step-up, step-down, or step-up/step-down circuit to convert a certain voltage to the required voltage. It uses an IC, power inductor, and capacitor to convert a DC input voltage to the required output voltage.

Transformers are most commonly used for increasing low AC voltages at high current (a step-up transformer) or decreasing high AC voltages at low current (a step-down transformer) in electric power applications, and for coupling the stages of signal-processing circuits.