MEXICOWANDERER wrote:
Grab a handful of AGC 30 fuses. Impress 40 amps at 6V across one. Then 35 amps at 36 volts?
AGC30 fuses are only rated for 32 V AC/DC. What's your point?
MEXICOWANDERER wrote:
OOoooo the 35 amps at 36 volts blows the fuse but how about the 6 volt fuse?
Uh, huh??? A AGC30 has a resistance of 0.002 ohms. Tell us how you're going to put 36V/35A or 6V/40A across one. What you're suggesting in nonsensical. Hint: Ohm's law is useful to know.
Assuming the fuses were equal (no manufacturing tolerances), the higher load would blow first. But, at 40 A, a 30 A AGC fuse might never blow. Cooper Bussmann shows their AGC30 taking over a minute to blow with a 45 A load, and doesn't even bother to show a time for 40 A, because it won't reliably blow at that current. They spec "under an hour" for 135 percent (40.5 A). It would likely tolerate 35 A forever. The fuse has no idea what the circuit voltage is (until after it blows), because the rest of the circuit is dropping the voltage seen by the fuse.