Dingfeng Capacitor---What is the different between capacitor and inductor ?
Issue Time:2017-12-27

Capacitor vs Inductor---What's the different between capacitor and inductor


Capacitor and inductor are two electrical components used in circuit design. Both of them belong to passive elements category, which draw energy from the circuit, store, and then release. Both capacitor and inductor are widely used in AC (alternative current) and signal filtering applications.


Capacitor is made of two conductors separated by an insulating dielectric. When a potential difference is provided to these two conductors, an electric field is created and electric charges are stored. Once the potential difference is being removed and two conductors are connected, a current (stored charges) flows to neutralize that potential difference and electric field. The rate of discharge gets reduced with time and this is known as the capacitor discharging curve.

In analysis, capacitor is considered as an insulator for DC (direct current) and conducting element for AC (alternating currents). Therefore, it is used as a DC blocking element in many circuit designs. Capacitance of a capacitor is known as the capability to store electric charges, and it is measured in the unit called Farad (F). However in practical circuits, capacitors are available in the ranges of micro Farads (µF) to pico Farads (pF).


Inductor is simply a coil and it stores energy as a magnetic field when an electric current passing through it. Inductance is a measure of an inductor's capability to store energy. Inductance is measured in unit Henry (H). When an alternative current is passing through an inductor, a voltage across the device is observable due to changing magnetic field.

Unlike capacitors, inductors act as conductors for DC, and the voltage drop on the element is almost zero, as there is no changing magnetic field. Transformers are made of coupled pair of inductors.

What is the difference between Capacitor and Inductor?

1. Capacitor stores an electric field, whereas inductor stores a magnetic field.

2. Capacitor is open circuit for DC, and inductor is short circuit for DC.

3. In an AC circuit, for capacitor, voltage ‘lags’ current, whereas for inductor, current ‘lags’ voltage.

      4. Energy stored in a capacitor is calculated in terms of voltage (1/2 x CV2), and this is done in terms of current for inductor (1/2 x LI2)

As the top three capacitor manufacturers in Wengling, we have engaged in producing capacitor for over 28 years and we are trying to be better.We believe one day Dingfeng Capacitor will exist in every corner of the world by means of its reliable quality and good reputation. By the way, Dingfeng sincerely welcome all the friend to visit our company and hopes to have a good communication and double-win partnership with all of you cause Dingfeng capacitor is always on the way to be better! Your views are the driving forces of Dingfeng! I hereby on behalf of all the members of Dingfeng, thank all of you for the long-term supporting and concerning of our growth.

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