On steel vs silver or gold fuses, here is my explanation on the theory of less resistance for higher end fuses.
The whole idea behind a fuse is that heat causes the conductor to melt. If the fuse is made of silver or gold vice steel, since both silver and gold have much lower melting temperatures than steel you will require less heat to melt it. Resistance causes heat, thus less resistance is required to melt the conductor. This means you must have more material for the current to flow through for a given amperage fuse. More material with better conductivity results in less resistance and better current flow through that circuit.
The only real real negative side to a silver or gold fuse is the cost you eat if the fuse blows. But if you’re blowing fuses then you probably have bigger problems. You could probably get a similar effect with copper, which is less expensive, but has a higher melting temperature than silver and gold.
The whole idea behind a fuse is that heat causes the conductor to melt. If the fuse is made of silver or gold vice steel, since both silver and gold have much lower melting temperatures than steel you will require less heat to melt it. Resistance causes heat, thus less resistance is required to melt the conductor. This means you must have more material for the current to flow through for a given amperage fuse. More material with better conductivity results in less resistance and better current flow through that circuit.
The only real real negative side to a silver or gold fuse is the cost you eat if the fuse blows. But if you’re blowing fuses then you probably have bigger problems. You could probably get a similar effect with copper, which is less expensive, but has a higher melting temperature than silver and gold.