Due to the excellent performance and suitable unit price, film capacitors are widely used in many industries such as electronics, home appliances, communication, electric power, electrified railroad, hybrid cars, wind power and solar power generation, etc. They have become the indispensable electronic components to promote the renewal of the above industries. When buying, sometimes we choose the film capacitor with inappropriate capacities, such as the one with a large capacity as possible. Is this correct?

According to the principle of capacitors, when most of us choose film capacitors, the larger the capacity should be, the better. Although this statement has a certain degree of reasonableness, in the current technology, the larger the capacity, the larger the volume of the capacitor, which will take up more space. In some electronic products like cell phones, space is very important. If the capacitor with too large a capacity is wrongly selected, resulting in a waste of position is not worth it.

The large capacity will affect the heat dissipation at the same time,  the bad heat dissipation is not good for the film capacitor or the appliance. In addition, generally speaking, the larger the capacitor capacity of the same type of voltage resistance, the more expensive it is, we have to choose the right one, not the expensive one. Therefore, we should select the film capacitor that can meet the demand of the overall circuit. There is no need to blindly pursue the large capacity. The right one is the good one.