A Feedthrough capacitor is a capacitor with three terminals, one of which is a positive terminal, one is a negative terminal, and the other is a neutral or ground line. The reason why the feedthrough capacitor is called a three-terminal capacitor is that it can be used to connect the power supply, the ground wire and the load at the same time, and the feedthrough capacitor manufacturers are analyzed.

The feedthrough capacitor is usually used in circuits such as DC power filter and electromagnetic interference suppression, and its role is to filter out high-frequency noise and electromagnetic interference in DC power supply to ensure the normal operation of the circuit. Compared with the traditional two-terminal capacitor, the feedthrough capacitor has better ability to suppress high-frequency noise and lower series inductance, which can effectively improve the circuit performance.

The reason why the feedthrough capacitor is designed as a three-terminal capacitor is to facilitate connection to different parts of the circuit and maintain the accurate transmission of the signal. One terminal is connected to the positive terminal of the power supply, the other terminal is connected to the negative terminal of the power supply, and the neutral line or ground line is connected to the ground terminal, and the electromagnetic interference and noise in the circuit can be effectively suppressed by this connection.

In addition, the feedthrough capacitor can also reduce the overvoltage and current peak on the DC power line, and play a protective role in the circuit. By connecting the feedthrough capacitor, the loss of components in the circuit can be reduced and the stability and reliability of the system can be improved.

In general, the reason why the feedthrough capacitor is a three-terminal capacitor is that it has a better ability to suppress high-frequency noise and electromagnetic interference, a lower series inductance, and the convenience of connecting different parts of the circuit. The feedthrough capacitor is a very important and effective component in power supply filtering and electromagnetic interference suppression circuits.

Kete Microwave Electronics Co., Ltd. specializes in designing and manufacturing state of the art RF/Microwave passive components solution. The primary products lines include ferrite components (RF Isolator, RF Circulator), High Power Resistive Components (RF Resistor, Coaxial Fixed Attenuators & Termination), Feedthrough Capacitor (EMI RF Filter), Microwave Power Divider and RF Filter.