General Knowledge - Basic General Knowledge - Discussion

Tinned copper and other low melting wire used in fuse is it right ?

Metal wire must having high melting point in fuses.

The concept of fuse can be better understood by knowing the term called threshold. Its defines the maximum and minimum usable voltage levels of any circuit. Once the employed voltage in a circuit exceeds the predefined threshold value mentioned by the manufacturer it may lead to circuit malfunctioning thereby it arises errors or defects at the output due to burning of wires in the internal circuitry, also it may cause damage to the circuit. In order to avoid this problem the concept of fuse wire is used.

At the times of any part of the circuit facing higher voltages than the specified threshold voltage, the fuse wire receives the exceeded voltage and get burnt, which protects other internal circuitry wires from getting damaged. This is possible only when the fuse wire is having lower melting and higher resistance value as heat produced is proportional to current and resistance. Usually high resistance coils have low melting point.

Fuse has low melting point of fuse wire which will be burn at high current through wire.