185473J250RFA-F

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Film Capacitors

Film capacitors are specialized capacitors used in electronics, consisting of thin film dielectric materials forming a capacitor. This type of capacitor is used when miniature size, low loss, and high stability are needed. Film capacitors can be surface-mounted, with very small size, or installed in through-hole style with rod-shaped terminals.

185473J250RFA-F is a type of film capacitors from Panasonic. This type of capacitors is constructed using thin film layers of polypropylene dielectric material and metal layers applied to an etched aluminum substrate. The type of metal layers depens on the application, and it can be copper, nickel, or titanium. They have an extremely low ESR due to their extremely thin layers of dielectric material, which offers superior performance in a circuit.

The main use of 185473J250RFA-F is high frequency and high-sensitivity analog filtering and sample-hold, or as an energy storage device. They also feature very low parasitic inductance and capacitance. The combination of the ultra-low ESR and the low equivalent series inductance allows for the film capacitors to have excellent performance in high frequency range, up to 1GHz and beyond, and even larger capacitance values are available.

The working principle of the 185473J250RFA-F film capacitors is quite simple. When a voltage is applied to the two terminals of the capacitor, the electric field between the two opposite plates causes electrons to move from one plate to the other, creating a build-up of charge and a field that opposes the applied voltage. This is what forms the capacitance, and allows the capacitor to store the electrical energy. The amount of capacitance is determined by the area of the plates and the distance between them.

In conclusion, the 185473J250RFA-F film capacitor is an excellent choice for applications requiring miniature size, low ESR, low parasitic inductance, or excellent performance in high frequency range. It offers superior performance in analog filtering and sample-hold. It also features a very simple working principle based on the build-up of electric charge between two plates. The thin layers of dielectric material offer a good insulation and contribute to the excellent performance of the capacitor.

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