Synergistic Red Fuse ...

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

Al, right amps and volts are two different things. Fuses protect against current/amps. Thanks for that clarification.

Countdown resumed....

Al ...

I'm REALLY glad you're here.  :-)

OP

mapman ...

You can bet that there are those of us who are waiting with baited breath for your assessment of the fuse. I had it in my REF-3 with really good results over the HiFi Tuning fuse that preceded it. Keep in mind that the SR Black fuse blows (no pun intended) what I sent you away.  :-)