Equivalent Series Inductance (ESL)

Equivalent series inductance (ESL) refers to the total inductance that is effectively in series with the ideal capacitance of the capacitor. This inductance arises from the physical construction of the capacitor, such as the length and shape of the leads, the internal structure, and the physical size of the capacitor itself. Equivalent series inductancs is an important parameter, especially in applications where the impedance characteristics of capacitors at high frequencies are critical.