FN258-55-34

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Power line filter modules have been used for decades in electrical and electronic equipment, and are indispensable components in creating reliable power supply systems. FN258-55-34 series filter modules are widely used in switchgear, inverter, UPS, and rectifier applications. The FN258-55-34 series has a wide range of features, such as high performance, high reliability, and low resonant frequency. This article introduces the application field and working principle of FN258-55-34 series.

FN258-55-34 can filter electromagnetic interference signals in the power supply system, absorb pulse and transient interference waves, and reduce cross talk between power supply lines. It is suitable for the following application fields: electric chargers, power supplies, industrial tools, motors, computers, medical equipment, control equipment, communication systems, and other peripheral electronic components.

The FN258-55-34 filter module features a standard structure, including components such as electromagnetic filters, inductances, capacitors, and transformers. Its working principle is as follows. The input electromagnetic interference signal enters the filter module, passes the electromagnetic filter, and then enters the inductance. This inductance is connected in series with the capacitor. The inductance and capacitor form a low-pass filter circuit, and the impedance of the inductance is stricter than that of the capacitor. Therefore, the electromagnetic interference signal is blocked by the inductance and only the low-frequency signal can pass to the output.

At the same time, the filter module also has a low resonant frequency. This low resonant frequency enables it to effectively filter out the electromagnetic interference signals generated by other power supply systems. The resonant frequency of the filter module is usually determined by its capacitance. A smaller capacitance means a higher resonant frequency, and a larger capacitance means a lower resonant frequency.

In addition, the FN258-55-34 filter module also has a protector circuit. Its purpose is to protect the filter module from overloading or high temperature environments. The protector circuit is composed of a fuse and temperature sensitive components. When the power or temperature of the filter module exceeds a certain limit, these protection components can cut off the power or reduce the temperature to a safe range, and thus protect the filter module from damage.

In conclusion, FN258-55-34 filter modules are widely used in various application fields including switchgear, inverter, UPS, and rectifier. The working principle of the filter module involves passing the electromagnetic interference signal through the inductance and capacitor, to form a low-pass filter. It also has a low resonant frequency and a protector circuit for protection against overloading or high temperature environments.

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