Susceptance, with the symbol B, is the imaginary part of admittance, the reciprocal counterpart to reactance in describing how readily a circuit passes alternating current.
Susceptance, represented by the symbol B, is the imaginary part of admittance, the measure of how readily a circuit allows alternating current to flow. Admittance, symbol Y, combines conductance and susceptance as Y equals G plus jB, where G is the conductance and j represents the imaginary unit. Just as susceptance is the reciprocal counterpart to reactance, admittance is the reciprocal of impedance, describing ease of current flow rather than opposition to it.
Susceptance arises from the capacitive and inductive elements of a circuit and, like reactance, depends on frequency. It is used in circuit analysis alongside conductance to describe the behavior of alternating current circuits in terms of admittance rather than impedance.
In commercial and industrial systems, susceptance and admittance provide an alternative way of analyzing how circuits and cable respond to alternating current. Recognizing the concept helps in understanding circuit behavior at different frequencies.
Because susceptance arises from the capacitive and inductive elements of a circuit and depends on frequency, it is used in circuit analysis alongside conductance to describe the behavior of alternating current circuits in terms of admittance rather than impedance.
Recognizing how susceptance describes the ease of current flow helps illustrate the considerations behind circuit and cable behavior, with admittance offering an alternative to impedance for analyzing alternating current systems.
At Windy City Wire, an understanding of electrical fundamentals like susceptance supports the broader context in which low-voltage cable operates. Recognizing how susceptance describes the ease of current flow helps illustrate the considerations behind circuit and cable behavior.
Symbol B (susceptance)