TDK's 3-terminal filters obtain a sharp attenuation characteristic by combining a capacitor and inductor on one chip, and are highly effective in supressing noise in electronic devices. A wide-ranging product lineup is made available by taking advantage of TDK's unique technologies such as our firing technique for different materials, including a multilayer type suitable for miniaturization and a wirewound type suitable for power consumption reduction. They thus support signal circuits, power circuits, and large-current power circuits of various electronic devices including digital TVs and smartphones.