[Elecraft] Fusing the K3 Power Line

Carl Clawson carlclawson at frontier.com
Tue Jun 26 21:13:46 EDT 2012


A better way to say it would be "A good fuse is one that meets its written
specifications." They aren't all guaranteed to ever blow at their rated
current. Some are, some aren't. Looking one up at random on littelfuse.com
just now, I found "time to open" specified as:

150% of rating, max 30 minutes
300% of rating, max 10 seconds

Another one says

100% of rating, min 4 hours
135% of rating, max 1 hour
200% of rating, max 1 second

Circuit breakers are rated similarly. Remember, nothing is 100% accurate or
100% perfect, so there has to be some "slop" somewhere.

73 and thanks for listening,
Carl WS7L
"Mr Pedantic"

> -----Original Message-----
"A good fuse is one that fuses at its rated current. No wonder there
is so much confusion about fuses. "



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