12 Dec
2012
12 Dec
'12
12:03 p.m.
Other useless data on Buss fuses anyway, I always assume they will run
forever at 100% overload, and blow immediately on any spike of 10X over
rating.
IE if you have a 5x rated spike you might not get a blow.
Slow blows fusetrons are very precise but temperature sensitive. they
will bake the solder in the mechanism for a very precise time if the
current heats it to there and then release and open the slow blow half
of the mechanism. If they are operated in the 150F + range, then you
get enough heat into the fuse to make it blow sooner.
The solder they use I tested with a temperature rig would run 500 test
plugs for the rated time, and then all blow typically within 1 to 2
seconds of each other.
that test is done on every batch of the material. I don't know what
they do now in ROHS (or whatever it is) non lead times. I think there
was even gallium and indium in the alloy they used. Pretty exotic stuff
anyway.
Jim
On 12/12/2012 10:59 AM, Chris Tofu wrote:
Are these by default 250v? Thats all Radio Shack
sells. I dont recall there being a voltage rating on the old ones.