How to choose the type of film capacitor

    Parameters to consider when selecting film capacitors

    1. Capacity value

    Capacitance refers to the amount of charge a film capacitor can store. It's usually expressed in farads (F) or picofarads (pF). When selecting a film capacitor, you need to determine the appropriate capacitance based on the circuit requirements.

    2. Capacity error

    Capacitance error refers to the deviation between the actual capacitance value of a film capacitor and its nominal capacitance value. Generally speaking, the smaller the capacitance error, the better. However, in some applications, the capacitance error cannot be too small, otherwise it may cause problems such as resonance in the circuit.

    3. Temperature coefficient

    The temperature coefficient refers to the change in capacitance of a film capacitor with temperature changes. It is usually expressed in ppm/°C. The smaller the temperature coefficient, the smaller the change in capacitance with temperature changes.

    4. Operating voltage

    The operating voltage refers to the maximum voltage a film capacitor can withstand. It is usually expressed in volts (V). When selecting a film capacitor, you need to consider whether the operating voltage can meet your actual needs.

    5. Package Type

    There are many packaging forms of film capacitors, such as surface mount type, plug-in type, etc. When choosing a film capacitor, you need to choose the appropriate packaging form according to the actual application.