BFC237512752

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Introduction

Film capacitors, also known as polymer electrolyte capacitors, are one of the most modern and advanced types of capacitors available on the market. They are widely used in power supplies, switching power supplies, and audio applications due to their excellent properties such as low ESR, high ripple current capability, high temperature stability, and long life. The BFC 237512752 operating from 12V DC is one of the most commonly used types of film capacitors.

Application Field and Working Principle

Film capacitors are used in a variety of application fields, including power supplies, switching power supplies, DC-DC converters, and audio applications. Most commonly, they are used in DC/DC converters, which require a large capacitance value at low ripple voltage levels. As with all capacitors, the film capacitors have two electrodes, which are insulated from each other by a solid dielectric material. The dielectric is either a woven polyethylene terephthalate (PET) film or a metalized polypropylene film. The BFC 237512752 capacitors consist of two layers of PET film, one of which is metalized and the other of which is solid. The metalized layer acts as the positive electrode, while the solid layer acts as the negative electrode.

The metalized PET film is coated with a thin layer of aluminum, which provides the charge storage capability. An electric charge is applied to the metalized film, which causes a dielectric field to be created between the two layers of film. This dielectric field stores energy, and the capacitive reactance of the film capacitor is determined by the capacitance of the dielectric field. Because of the high dielectric strength of the PET film, film capacitors have much higher capacitance values and voltage ratings than other types of capacitors.

The capacitor has a rated voltage of 12V DC, which means it can withstand up to 12V DC of sustained operation. The capacitance value of the BFC 237512752 is 215μF. When selecting a film capacitor, the rated voltage should be chosen such that the peak voltage in your application does not exceed the maximum rated voltage of the capacitor. The capacitance value should also be chosen such that it can adequately filter out any unwanted noise in the signal.

Advantages and Disadvantages

Advantages

The main advantages of film capacitors are their excellent characteristics. They have a high ripple current capability, which makes them suitable for applications which require frequent reversing of the power supply voltage. The temperature stability is also excellent, which makes them suitable for long-term operation in high temperature environments. In addition, they have a very low ESR value, which allows them to deliver high current handling capabilities with minimal losses.

Disadvantages

The main disadvantage of film capacitors is their cost. They are typically more expensive than other types of capacitors, such as aluminum electrolytic or tantalum capacitors. Additionally, they cannot handle very high voltage applications, as the thin PET film used as the insulation can break down under high voltage. In addition, they have a limited capacitance range, which can make them unsuitable for applications which require large capacitance values.

Conclusion

The BFC 237512752 is a popular type of film capacitor which is widely used in DC/DC converter applications. It has a rated voltage of 12V DC and a capacitance of 215μF. The main advantages of this type of capacitors are their excellent characteristics, including high ripple current capability, temperature stability, and low ESR values. The main disadvantage of film capacitors is their cost, but this should not deter the designer from using them in appropriate applications.

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