21FD3740

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Film capacitors are a type of capacitor made with plastic and foil that has higher insulation capabilities than normal capacitors. It usually has two parallel electrodes, with a layer of oxide in between. These capacitors are used in a variety of electronics applications, from high frequency power supplies to data acquisition systems. The 21FD3740 is a film capacitor designed specifically for automotive applications. It offers superior stability, reliability and efficiency compared to traditional electrolytic capacitors.

The 21FD3740 film capacitor is a standard automotive version of the film capacitor used for power electronics, AC power supplies, communications, and automotive systems. It features a standard housing size and shape, tin-plated terminals for easy connection, and a wide temperature range of -40°C to +85°C. In addition, it comes with a built-in ESR network to reduce EMI noise. This ensures a more reliable and efficient operation of the capacitor in the system.

The main application field of 21FD3740 is for power electronics and switching power supplies. It is an ultra-low ESR capacitor with very low leakage current and excellent capacitance stability. It has an operating temperature range of -40°C to +85°C and is vibration resistant. This makes it ideal for applications such as car audio system, fuel injection system, energy recovery device, automotive systems, power supplies, and in applications that require large capacitance values.

The working principle of 21FD3740 film capacitor is based on the capacitance property of the plastic film used as its dielectric. It has two parallel metal layers; the positive and negative layers. The electrical charge will be stored between these two layers due to the insulating layer of oxide, providing it with the required capacitance. It has two main components: the dielectric layer and the electrodes. When an external voltage is applied to the capacitor, a charge will be stored between the two electrodes. As the electrical current passes through the capacitor, the stored charge will discharge and current will flow until the voltage is equal to zero.

The 21FD3740 film capacitor is a reliable and efficient capacitor for use in automotive applications and other advanced power electronics. Its low ESR network, high temperature range, and vibration resistance make it a great choice for high current systems. Its high efficiency and capacitance stability also make it a good choice for automotive electronics, AC power supplies, communications, and more.

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