Abstract: A novel electrical circuit protection design with dielectrically-isolated diode configuration and architecture is disclosed. In one embodiment of the invention, a plurality of diodes connected in series is monolithically integrated in a single piece of semiconductor substrates by utilizing dielectrically-isolated trenching and silicon-on-insulator substrates, which enable formation of “silicon islands” to insulate a diode structure electrically from adjacent structures. In one embodiment of the invention, the plurality of diodes connected in series includes at least one Zener diode, which provides a clamping voltage approximately equal to its breakdown voltage value in case of a voltage spike or a power surge event.