ECW-H8912HL

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Film capacitors are widely used in various electrical and electronic equipment. They are mainly used in the suppression, coupling, and smoothing of electronic circuits. The ECW-H8912HL is a high-performance metallized polyester film capacitor developed by Yageo, which mainly replaces low-voltage ceramic capacitors in many occasions. This paper mainly introduces the application field and working principle of ECW-H8912HL.

1. Application field of ECW-H8912HL

The ECW-H8912HL is mainly used in industries such as communications, automotive electronics, industrial automation and control, medical instruments and energy transformers. Specifically, its application field includes the stability of the power supply, decoupling, smoothing, and EMI/RFI noise suppression of the circuit. In addition, this type of capacitor is used to circuit to increase the insulation layer for high temperature, high voltage, and high frequency applications and to eliminate the high-frequency electromagnetic interference of various communication signals in the circuit.

2. Working Principle of ECW-H8912HL

The ECW-H8912HL is a cylindrical film capacitor formed by winding a metallized polyester film with an insulating polyester film. During the winding process, both sides of the film are sprayed with aluminum or zinc layers by an evaporation method, which greatly reduces the inductance. Because the electrical energy is evenly distributed, the high-precision voltage and frequency characteristics of the capacitor are improved, the self-resonance frequency is high, and the ripple current withstand is five times the rated current.

When the ECW-H8912HL is used as a bypass capacitor, an RC low-pass filter is formed by the capacitor and the load impedance. The capacitor is responsible for filtering the alternating current (AC) component in the signal, and the load impedance is responsible for filtering the direct current (DC) component. This dual filtering action removes the AC component from the signal, resulting in a low-frequency signal.

When the ECW-H8912HL is used as an EMI/RFI noise suppression capacitor, it is connected in parallel, in series or in combination with the circuit components. The capacitance helps reduce the electromagnetic field, and the capacitor helps to reduce the amplitude of the high-frequency oscillation and reduce the high-frequency current and voltage. At the same time, the capacitor helps to reduce high frequency impedance and improve signal integrity.

“Low dissipation factor” is an important indicator of film capacitors. The ECW-H8912HL has a very low dissipation factor, which can reduce the power consumption of the circuit due to the energy stored in the capacitor, and the circuit works stably and reliably.

3. Advantages of ECW-H8912HL

Different from conventional film capacitors, the ECW-H8912HL has many advantages. First, it has a high dielectric strength, and its capacitance drops very little as the voltage increases. Second, compared to ceramic capacitors, it has higher temperature stability, lower equivalent series resistance (ESR) and leakage current, and can be used in high-voltage and high-frequency circuits. Third, its self-healing characteristics allow it to recover from any damage caused by electric accidents. Finally, because of its small size, low-profile design, and high capacitance values, the ECW-H8912HL can be used in very limited space.

Conclusion

The ECW-H8912HL film capacitor is a reliable and practical electronic component used for power supply voltage stability, decoupling, smoothing, EMI/RFI noise suppression, etc. It has better temperature stability than ceramic capacitors, low ESR and leakage current, and high dielectric strength. Moreover, the ECW-H8912HL is small in size, has a low-profile design, and is capable of high capacitance values, making it extremely suitable for restricted spaces.

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