The type of fuse and the amp rating for the fuse determines the voltage.
Glass tube type fuses can be rated from 24 or 36 volts up to 250 volts. The lower 5 and 10 amp fuses are rated up to 250 and the 20 amp ones are rated for 36.
Automotive buss or blade type fuses are usually considered to be good for up to 36 volts. (its usually not an issues since 99% of the time they are used on 12v systems)
For the 400 amp high voltage fuse you are going to have to try and find a high voltage motor controller slow blow fuse. That is the closest thing to your application I can think of.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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