Time-delay fuses have an internal time-delay mechanism. They are designed to open only on an excessive current draw for a defined period of time. Time-delay fuses are typically used to protect inductive and capacitive loads that experience heavy current draws upon initial powering. The time delay action prevents the fuse from needlessly blowing during a temporary heavy current draw or surge. Time-delay fuses tolerate higher inrush currents than fast-acting fuses and are ideal for DC-DC converter input protection as most converters have an input capacitor that draws a large amount of current when initially charged.