170473K400EB

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Film Capacitors

Film capacitors are non-solid electrolytic capacitors, which are based on the technology of metallized polypropylene film. This type of capacitor includes different ranges, such as AC capacitors, pulse capacitors, motor starting capacitors, lighting capacitors, snubber capacitors and many more.

The 170473K400EB is one of the most popular film capacitors in the market and is known for its advanced features that make it suitable for many different applications. This capacitor is designed to reduce EMI noise and ripple in high power alternating current (AC) circuits. The 170473K400EB capacitor utilizes a metallized polypropylene film dielectric that is capable of withstanding high pulse and surge currents, while providing excellent capacitance stability. It also has a low ESR and ESL-effectively reducing the amount of heating in the circuit.

The major application areas of the 170473K400EB capacitor include AC power circuits, such as motor starting circuits, DC link circuits, harmonic current suppression, surge protection circuits and motor control modules. It is also used in systems with high voltage switching, lighting applications and automotive components. The capacitor is available in various sizes, depending on the capacitance value needed in the circuit.

Working Principle

The working principle of the 170473K400EB film capacitor is based on electrostatics. In this type of capacitor, the voltage applied creates an electric field that causes the charge to be stored in the two metallic plates of the capacitor. This is the same principle used in solid electrolytic capacitors. However, in a film capacitor, the dielectric is a thin plastic film, which provides much higher insulation resistance, increased stability, and low ESR.

The advantage of using a film capacitor is that it can store higher voltage and current than solid electrolytic capacitors, at lower temperatures. This is because the plastic film does not become conductive, unlike other materials, and therefore, it does not generate heat under high voltage and current. In addition, the polymer-film in the capacitor has the characteristic of blocking high frequency signals. This makes it suitable for applications that require a high level of noise suppression.

In order to maximize the capacitor’s performance, the number of turns on the capacitor’s windings and the geometry of the capacitor have to be carefully matched to the application. This helps to ensure that the voltage and current ratings are appropriate for the circuit, and the standardization of the capacitance values guarantees that it can be easily replaced for maintenance or upgrade..

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