An isolation circuit comprising: a first conducting substrate that is electrically connected to a reference voltage of the first voltage domain; a second conducting substrate that is electrically connected to a reference voltage of the second voltage domain; a first capacitive structure that is located on the first conducting substrate and in a first voltage domain, the first capacitive structure including first input and output capacitor plates that share a first intermediate capacitor plate to function as two series capacitors; a first dielectric layer configured and arranged to provide a first breakdown voltage by providing physical separation between the first intermediate capacitor plate and each of the first input and output capacitor plates, and a second dielectric layer configured and arranged to provide substantially the same breakdown voltage as the first breakdown voltage, and a physical separation provided between the first conducting substrate and the first intermediate capacitor plate; a second capacitive structure in a second voltage domain and that is located on the second conducting substrate and including, second input and output capacitor plates that share a second intermediate capacitor plate to function as two series capacitors; a third dielectric layer configured and arranged to provide a second breakdown voltage of the second capacitive structure by providing physical separation between the second intermediate plate and each of the second input and output plates, and a fourth dielectric layer configured and arranged to provide substantially the same breakdown voltage as the second breakdown voltage and to provide physical separation provided between the second conducting substrate and the second intermediate plate; and a current path between the first output capacitor plate and the second input capacitor plate. a first conducting substrate that is electrically connected to a reference voltage of the first voltage domain; a second conducting substrate that is electrically connected to a reference voltage of the second voltage domain; a first capacitive structure that is located on the first conducting substrate and in a first voltage domain, the first capacitive structure including first input and output capacitor plates that share a first intermediate capacitor plate to function as two series capacitors; a first dielectric layer configured and arranged to provide a first breakdown voltage by providing physical separation between the first intermediate capacitor plate and each of the first input and output capacitor plates, and a second dielectric layer configured and arranged to provide substantially the same breakdown voltage as the first breakdown voltage, and a physical separation provided between the first conducting substrate and the first intermediate capacitor plate; first input and output capacitor plates that share a first intermediate capacitor plate to function as two series capacitors; a first dielectric layer configured and arranged to provide a first breakdown voltage by providing physical separation between the first intermediate capacitor plate and each of the first input and output capacitor plates, and a second dielectric layer configured and arranged to provide substantially the same breakdown voltage as the first breakdown voltage, and a physical separation provided between the first conducting substrate and the first intermediate capacitor plate; a second capacitive structure in a second voltage domain and that is located on the second conducting substrate and including, second input and output capacitor plates that share a second intermediate capacitor plate to function as two series capacitors; a third dielectric layer configured and arranged to provide a second breakdown voltage of the second capacitive structure by providing physical separation between the second intermediate plate and each of the second input and output plates, and a fourth dielectric layer configured and arranged to provide substantially the same breakdown voltage as the second breakdown voltage and to provide physical separation provided between the second conducting substrate and the second intermediate plate; and second input and output capacitor plates that share a second intermediate capacitor plate to function as two series capacitors; a third dielectric layer configured and arranged to provide a second breakdown voltage of the second capacitive structure by providing physical separation between the second intermediate plate and each of the second input and output plates, and a fourth dielectric layer configured and arranged to provide substantially the same breakdown voltage as the second breakdown voltage and to provide physical separation provided between the second conducting substrate and the second intermediate plate; and a current path between the first output capacitor plate and the second input capacitor plate.