The current level for which protection is required. Fault conditions may be specified, either in terms of current or, in terms of both current and maximum time the fault can be tolerated before damage occurs. Time-current curves should be consulted to try to match the fuse characteristic to the circuit needs, while keeping in mind that the curves are based on average data. Polymer - A synthetic plastic material consisting of large molecules made up of a linked series of repeated simple monomers. Power - The ratio of energy per time.
Power is measure in Watts, and Joules.
Current x Voltage. Power Surge - A sudden series of pulses or spikes in the voltage or current of a circuit. The circuit is usually protected against power surges. Different fuse constructions may not all react the same to a given pulse condition. Electrical pulses produce thermal cycling and possible mechanical fatigue that could affect the life of the fuse.