FN3400-24-33

Power Line Filter Modules are designed to protect electrical circuits and systems from undesired or harmful disturbances. A popular module in this category is the FN3400-24-33, and its application field and working principle are complex but important to understand.

FN3400-24-33 series inrush current limiters are designed to fit into an EMC system, which suppresses or limits the surge current when power is switched on so that the power circuit components can be protected. This module is used for filtering out high frequency EMC interference signals from the power line. Its insertion loss is 45dB at 10MHz, and filter attenuation varies at different frequencies depending on the application. It also has a high temperature-resistant enclosure and is IP65 compliant, making it suitable for tough industrial applications.

The FN3400-24-33 is composed of various components, including a transformer, an LC filter, and a capacitive discharge unit. The transformer is responsible for transforming and transferring the power signal from the power supply to the loads. It is also built to be energy efficient. The LC filter is used to filter out undesirable frequency components, such as low-frequency ripple, high-frequency spikes, transients, and harmonics, from the power line. The capacitive discharge unit is used to ensure surge current protection and to reduce electrical circuit inductance.

The working principle of FN3400-24-33 involves several steps. Upon power-up, the capacitive discharge unit absorbs the surge current, and the voltage across the load is limited to a specific value, thus protecting the power line. Next, when the capacitor reaches its peak voltage, the energy stored in the capacitor is directed to the LC filter which filters the signal, eliminating any undesirable high-frequency components. Finally, the filtered signal is then transferred to the transformer, which then transfers the signal to the load, completing the step of power-up.

In conclusion, the FN3400-24-33 power line filter module is a powerful tool when it comes to protecting electrical circuits and systems from undesired or harmful disturbances. It offers a high temperature-resistant enclosure, IP65 compliance, and efficient filtering capabilities. Its simple yet effective working principle makes it an ideal solution for a variety of applications.