An antifuse is an electrical device that performs the opposite function to a fuse. Whereas a fuse starts with a low resistance and is designed to permanently break or open an electrically conductive path (typically when the current through the path exceeds a specified limit), an antifuse starts with a high resistance—an open circuit—and programming it converts it into a permanent electrically conductive path (typically when the voltage across the antifuse exceeds a certain level). This technology has many applications. Antifuses are best known for their use in mini-light (or miniature) style l
An antifuse is an electrical device that performs the opposite function to a fuse. Whereas a fuse starts with a low resistance and is designed to permanently break or open an electrically conductive path (typically when the current through the path exceeds a specified limit), an antifuse starts with a high resistance—an open circuit—and programming it converts it into a permanent electrically conductive path (typically when the voltage across the antifuse exceeds a certain level). This technology has many applications. Antifuses are best known for their use in mini-light (or miniature) style low-voltage Christmas tree lights.
==Christmas tree lights== Low-voltage lights cannot handle the full voltage typical to a residential circuit and are wired in series, unlike the larger, traditional, C7 and C9 style lights which are wired in parallel and are rated to operate directly at mains/residential voltage. Since a blown bulb in a series circuit opens the entire circuit, a series string is rendered inoperable by a single lamp failure.
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