FUSE Question...Very Confused Please Help !

I have a Ceratec Penta Amp ...Made in Germany.

The installed fuse that came with the unit is rated @ 250 Volt / 5A

The Fuse Holder which is under the AC plug states "USE ONLY 250 Volt Fuses."

On back of Amp there are a choice of two fuse ratings:

#1. AC 230:S2.5A

#2. AC 110: S5A

I have it set to #2 setting ....AC 110 : S5A

I am confused. Is this fuse correct ?

Thank you

rocky131311-08-2022 2:15am

gs5556 Details Discussions Posts This discussion Message User 1,232 posts 11-09-2022 at 01:40am Copy Comment URL Report Comment Edit Delete You have to be careful because equipment voltage rating is different from actual wall voltage. The fuse size is determined from the transformer power rating using the equipment rating and then the wall voltage: 230V x 2.5A = 575VA Since you are using US 120 volts, the amperage is: 575VA/120V = 4.8 amps So the 5-amp fuse is correct.
Post removed Nov 09, 2022
jea48 Details Discussions Posts This discussion Message User 4,400 posts 11-09-2022 at 05:09am Copy Comment URL Report Comment Edit Delete Owner manual specs: 500VA Max power consumption. 500VA / 110V = 4.55A. The designer of the amp only bumped the fuse up 110%. 4.55A X 110% = 5A. A 5A slow blow fuse seems a little tight to me for the amplifier... 500VA / 230V = 2.18A X 110% = 2.4A (Round up to 2.5A.) (500VA / 120V = 4.17A X 120% = 5A) .
kraftwerkturbo Details Discussions Posts This discussion Message User 318 posts 11-09-2022 at 11:54am Copy Comment URL Report Comment Edit Delete That brings up the question: which fuses sound best?
facten Details Discussions Posts This discussion Message User 2,863 posts 11-09-2022 at 01:11pm Copy Comment URL Report Comment Edit Delete @kraftwerkturbo Search in the Forum, a number of threads on different fuse brands; and there's no universal answer - preference