Winter Posted June 11, 2018 Share Posted June 11, 2018 Hi guys. A fuse went in one of my friends amp. Can’t seem to find a matching one it says: F3.15H250V Back of amp (pics 1) Link to comment Share on other sites More sharing options...
rocky500 Posted June 11, 2018 Share Posted June 11, 2018 (edited) Its a Fast Blo 3A or 3.15A Fuse. How long is the fuse? Normally 20mm x 5mm. Edited June 11, 2018 by rocky500 Link to comment Share on other sites More sharing options...
Guest DarkNark Posted June 11, 2018 Share Posted June 11, 2018 https://au.rs-online.com/web/p/cartridge-fuses/2673458/ https://au.rs-online.com/web/p/cartridge-fuses/7833248/ Depending on the length Helpful site for the markings Link to comment Share on other sites More sharing options...
rocky500 Posted June 11, 2018 Share Posted June 11, 2018 If you put a new fuse in and it does not blow, you can even buy flashy ones online. https://www.ebay.com.au/itm/1x-HIFI-Power-Silver-Fuse-Tube-Audio-Nano-Fuse-5-20mm-1A-2A-3A-4A-5A-6A/231861837684?ssPageName=STRK%3AMEBIDX%3AIT&var=531098005367&_trksid=p2060353.m2749.l2649 Link to comment Share on other sites More sharing options...
Misternavi Posted June 11, 2018 Share Posted June 11, 2018 i think the title should be changed to con-fuse-ion Link to comment Share on other sites More sharing options...
trobbins Posted June 12, 2018 Share Posted June 12, 2018 (edited) That blown fuse is a ceramic tubed high-capacity rated fuse. The amp label indicates you don't need to use that style of fuse, and can use a more common glass tubed style. The amp's operating manual may have additional details. That particular fuse may have been used because it was all that the previous owner had on hand. 3.15A is a common value now, whereas 3A was the common value back then. The F is for fast-blow (compared to T for time-delay or slow-blow). Was there any reason why the fuse blew that you know of? Most techs would put a replacement fuse in, but also start the amp up with a limiter (to detect if the fuse was going to blow again). Edited June 12, 2018 by trobbins Link to comment Share on other sites More sharing options...
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