Adding intelligence to fuse models for faults

The SPICE fuse models that are based on theoretical fuse behavior and data derived from faulted fuse tests are presented. An overview of SPICE fault analysis and a brief history of the models´ development are included. The limitations of each model and possible methods of overcoming them are examined. The most favored model is discussed in more detail. Its major advantages are: the more accurate prediction of the fuse resistance as the fuse element is heated during the fault event; and the capability of the model to know when to blow, based on fuse rating and fault current profile