I designed a lot of equipment with Littelfuse devices. Not all of them are cheap, some are pretty pricey, the last 10A, 600VAC ones I used were 20$ each in quantities of a 100 but they are all very good quality. The gold does make sense, there are solid engineering reasons for gold contacts, of which I am sure most everyone knows. As for the fuse 'inards', they still have to meet the I2t spec. The last amplifier I designed I put the fuse in the feedback loop bypassed with a 100K resistor to eliminate the non linearity of the fuse. I'll have to check these out.
Anyone used these audio ceramic slow blow fuses from Littlefuse?
While perusing the fuse offerings at Mouser Electronics I noticed these audio/medical fuses priced at around $9.00 US. As someone who has been reluctant to spend the price for the highest priced audiophile fuses, these more reasonably priced offerings caught my eye. Just curious if anyone has had occasion to try them and form an opinion. I must say the attention to quality control, ratings specifications, and published testing results make these look more appealing to me than the rather vague specs of many "audiophile" fuses.
https://www.mouser.com/datasheet/2/240/Littelfuse_Fuse_285_Datasheet.pdf-1317236.pdf
https://www.mouser.com/datasheet/2/240/Littelfuse_Fuse_285_Datasheet.pdf-1317236.pdf