NFM18CC220U1C3D Filters

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Feed Through Capacitors (FTCs) are passive components used to suppress high frequency electromagnetic interference (EMI) that passes through or couples into remote sections of a system. The NFM18CC220U1C3D is an example of an FTC, designed to suppress EMI on low voltage motor drives, industrial controls, PCs, and electrical appliance controls.

This device consists of two capacitors in series, one inside and one outside, which form a shunt capacitor. It also has a metalized polyester tab and polyester film body which act as a shield around the electrical part. The amount of current that can be passed through the device is limited by the breakdown voltage of the two capacitors. The NFM18CC220U1C3D has a breakdown voltage of 250V.

Aside from its use in EMI suppression, the NFM18CC220U1C3D has a number of other applications. One such application is to provide a low-impedance path for DC current in high frequency circuits. This is done by connecting the device to both the source and load of the circuit, forming a low impedance connection between them. This low impedance connection will then reduce the inductive reactance of the circuit, allowing more DC current to flow. It can also be used in conjunction with other passive components, such as inductors and resistors, to reduce the amount of AC current being passed through the device.

In its application as an EMI suppression device, the NFM18CC220U1C3D works by allowing a small amount of the EMI to pass through the device and then dissipating it into the surrounding environment. The capacitors act as filter circuits, allowing only high-frequency signals to pass and rejecting lower frequency signals. The metalized polyester tab and polyester film body act as a shield, reducing the amount of EMI that can be transmitted into remote sections of the system.

The working principle of the NFM18CC220U1C3D is simple. When exposed to high frequency signals, the capacitors in the device create an opposite phase signal which counters the original signal, causing them to cancel each other out. The capacitors absorb the energy of the signal, and the excess energy is then dissipated into the surrounding environment. The combination of these effects creates an efficient EMI suppression device which allows high frequencies to be passed through or coupled into remote sections of a system with minimal interference.

In conclusion, the NFM18CC220U1C3D is a passive component designed for high frequency EMI suppression and many other applications. It consists of two capacitors in series which create an opposite phase signal which counters the original signal, causing them to cancel each other out. It also has a metalized polyester tab and a polyester film body which act as a shield reducing the amount of EMI that can be transmitted into remote sections of the system. The combination of these effects creates an efficient EMI suppression device ideal for use in low voltage motor drives, PCs, and industrial controls.

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