ECQ-B1121JF

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Film capacitors are versatile components that are used for a wide range of applications. From basic DC blocking voltage suppression, surge protection, to audio and data signal applications, film capacitors are the go-to element for many designers. From tiny film capacitors to large power film capacitors, they offer reliable performance in the harshest environments. One type of film capacitor is the ECQ-B1121JF.

The ECQ-B1121JF is a miniature, low-voltage polarized capacitor. It is housed in a rectangular metalized polypropylene enclosure with solderable through-hole leads. Its rated capacitance ranges from 24.7pF up to 1000000pF (1 µF), with a maximum standard voltage rating of 500VAC - 6.3VAC. It has an operating temperature range from -40°C to +85°C and a maximum working temperature of +105°C. It is an especially small-sized capacitor which makes it suitable for applications where space is at a premium.

The ECQ-B1121JF is an ideal choice for applications that require low-voltage, polarized capacitors. It commonly used for circuit coupling and decoupling, EMI/RFI filtering, and level-shifting. Its small size makes it perfect for applications where space is a constraint, like consumer electronics. In consumer electronic devices, it is often used to help filter EMI or RFI interference, as well as for blocking or bypassing high voltage spikes.

The working principle of ECQ-B1121JF is based on the relationship of electrical potential and electric field. As per Faraday\'s Law of Capacitance, when an electric potential is applied across two opposite electrodes in an enclosed dielectric environment, a potential will exist or circulate between the electrodes. This principle is used in capacitors of all types, varying from the electrostatic capacitors to the electrolytic capacitors. As the voltage applied is increased, the electrical field that arises creates an electrical displacement between the electrodes and which is proportional to the applied voltage.

In the ECQ-B1121JF, its metalised polypropylene film acts as the dielectric between two electrodes. These electrodes are separated by a certain distance, determining the capacitance value of the capacitor. As the voltage applied increases, electric field that arises creates an electric displacement that is proportional to the potential applied, and is stored in the dielectric material. As a result, a current is drawn from the source, and the capacitor stores electric charge until the voltage is discharged.

In conclusion, the ECQ-B1121JF is a miniature, low-voltage polarized capacitor used in many consumer electronic applications for filtering EMI/RFI interference, blocking or bypassing voltage spikes, and for level-shifting. Its small size makes it ideal for applications where space is a constraint, and its low-voltage nature makes it perfect for low-power applications requiring low voltages. The ECQ-B1121JF works on the principle of electrodynamic induction, and the amount of electric charge stored in its dielectric material is proportional to the voltage applied across it. This makes it an ideal choice for applications that require low-voltage polarized capacitors.

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