Synergistic Red Fuse ...

Oh by the way- for those of you really want to take the fuses to the next level-
if you are using them in a barrel type connector with a spring loaded mechanism, you will notice that there is play inside the connector. Wrap the fuse in Teflon plumbers tape  to make it snug (not too snug to keep the spring from compressing). Don't cover the black dot on the black fuse.  Reinsert and behold even greater clarity and focus. This tweak works on any fuse. Try it and report back. You should like what you hear!!!  IEC's respond well too to this. Minimizing vibrations goes a long way. 

Hmm, Ok issue # 1 for me with this fuse may be a show stopper in that it appears to not match my ARC pre-amp fuse specs.

ARC sp 16 manual indicates it takes a 3A, 230V  slo blow fuse.

Syn. Red fuse is T 3.15A, 500V.

T indicates slo blow I believe (check), 3.15 A is close enough, but 500V rating means this fuse will take slightly more than twice as many amps/power to blow as it should with properly rated 230V equivalent fuse.

Unless I'm missing something I cannot put this into my ARC sp16 without risking damage.

None of those things are a problem, Mapman. See the post I submitted earlier today, at the bottom of the previous page.

Best regards,
-- Al

Al,

Are you saying the 500V rating is safe even though it is twice what the vendor specifies because such an event /surge can never happen?

Also I’m wondering if the 500V rating alone compared to most fuses rated for US standard voltage at 120 volts might alone account for some sound difference in some cases. I don’t see many other commonly used fuses rated for 500 volts when countries in fact go no more than 230 volts or so. What would be the rational for a 500V rating in this case?

Here is a list of voltage standards per country I found.  Nothing near 500 V.

http://www.school-for-champions.com/science/ac_world_volt_freq_list.htm#.Vub7Ok_nQvY

Are you saying the 500V rating is safe even though it is twice what the vendor specifies because such an event /surge can never happen?

Hi Mapman,

Yes, I’m saying that the 500V rating is safe. As you will realize, a fuse does not protect against voltage surges, per se. It protects against excessive current flow. And as I explained in my post earlier today, the voltage rating defines how much voltage the fuse is rated to be able to withstand when it blows. And the only time a fuse will "see" the actual line voltage, or any other significant voltage, is if and when it blows.

If the line voltage exceeds the fuse’s voltage rating, the fuse may not be able to maintain an "open" state when it blows, and current may therefore be able to flow through it. Or, conceivably, it may explode.

So as I indicated in the earlier post, the higher that rating is the better, provided that everything else is equal.  Because a higher voltage rating means more margin relative to a given line voltage, which would be in the direction of being beneficial if it makes any difference at all.

Best regards,
-- Al