BFC2370FC104

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Film Capacitors

A Film Capacitor, also known as a Polymer Film Capacitor, are capacitors specifically designed with a plastic film as its dielectric. These capacitors have one area of direct application when used as AC filter and snubber circuits, and are used in many applications due to their low production cost, excellent dimensions, and high stability.

The specific type of capacitor under discussion is the BFC2370FC104 Film Capacitor, which has a capacitance value of 470 pF, an operating voltage of 63 V, and an operating temperature range from -55°C to +105°C. It is designed to be a non-inductively wound device, offering reliable self-healing properties due to its film dielectric.

Application Field

The BFC2370FC104 Film Capacitor has the application field to be mainly suitable for AC filters, snubber circuits, and switch power supplies. Its low inductive winding allows it to be used in AC power supplies since a change in long time current needs low inductance and high rate of current, while its strong insulation structure makes it always be used in voltages above 1KV.

Working Principle

The working of a Film Capacitor is dependent upon its dielectric, typically a plastic film that has a low viscosity, high dielectric strength, low dissipation factor, and low distortion. The dielectric when placed between two conductors, acts to store electrical energy. When a voltage is applied, the capacitance of the capacitor continues to increase until the dielectric reaches its maximum charge, beyond which the current ceases to flow and the capacitor is fully charged.

One notable feature that works in favor of the BFC2370FC104 Film Capacitor is its self-healing ability. Due to the polymer nature of the film, it has a plasticity, which causes it to partially collapse under a surge current, thus, not allowing the current to pass into the metal conductors and allowing the capacitor to recover from the surge and thus, self-heal.

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