Varies widely and wildly. Get that information from the maker of the power supply. Much, much smarter to get one that doesn't require the fuse, as there are better, more protective methods. Anytime you can blow a fuse, you can cause a fire, and if you are not there to put it out, you lose everything. We just inspected the top 12 power supplies in our repair store room. None have user replaceable fuses. You are putting your system and ones you love in an unnecessarily risky spot over a 50 cent fuse, and a $55 power supply. There is a REASON why that fuse blew, and if that system is not restructured, you or someone could end up in a fire... or perhaps just a ruined computer and data.