Inductors Coils Chokes

Inductors, coils, and chokes are passive magnetic components that store energy in magnetic fields — essential for filtering, energy storage in DC-DC converters, impedance matching, and EMI suppression. This category includes power inductors (wirewound, multilayer), RF inductors, common mode chokes, ferrite beads, coupled inductors, and air-core coils. Key parameters: inductance (nH to mH), DC resistance (DCR), saturation current (Isat), temperature rise current (Irms), self-resonant frequency (SRF), Q factor (for RF applications), and shielding type (shielded/unshielded). Wirewound power inductors offer lowest DCR for DC-DC converters; multilayer chip inductors provide smallest footprint for mobile devices; ferrite beads suppress high-frequency noise on signal/power lines. Popular manufacturers: Murata, TDK, Bourns, Coilcraft, Wurth Elektronik, Vishay, Taiyo Yuden, and Sumida.