You answered your own question. Fuses are current sensitive. If rate in
power, say like 200 watts, 200 amps at 1 volt is 200 watts same as 10 amps
at 20 volts.
Jim
Message: 13
Date: Fri, 26 Oct 2001 14:38:01 -0700
From: PDJ <phil@...>
Subject: Fuses
Hello,
Great discussion on fuses. Mark was correct in describing how a fuse
works but failed to answer the question "Why are fuses not rated in
units of power".
Ampere rating. Select the ampere rating for the fuse so that the fuse
can carry the normal operating-current conditions of the application.
The recommended operating current for the fuse is 75% of the nominal
rating. The derating of 25% compensates for the differences between the
documented UL-rating test procedure and the typical application.
Can anyone answer my original question - Why are fuses not rated in
units of power?
Thanks,
Phil
