I heard that both fuses are acceptable if they are arranged in series,
i.e. UL/CSA 1.25x0.25 and IEC 5x20, in the hope that the fuse with the
politically correct characteristics will blow in the appropriate
region.
This gave me a crazy idea, which could reduce the cost of compliance,
namely mount the fuseholders in a fashion where the footprints of the
fuses would cross, i.e. either one could be placed in the proper
holder, but not both at the same time.
Is this idea worthy of being patented?
Bogdan.
[email protected]
P.S.: All appropriate and legal disclaiamers apply!!
______________________________ Reply Separator _________________________________
Subject: RE: Concerning Fuses
Author: "Farnsworth,Heber" <[email protected]> at Internet
List-Post: [email protected]
Date: 10/20/97 5:45 PM
It is true that UL/CSA fuses have different fuse characteristics than
European fuses, and are not interchangeable (lengthy discussion left
out.) However, either can be used and either will protect if used
correctly.
UL does "Recognize" some brands of European-style fuses. Check with your
test house(s) to see what they'll accept.
The potential problem is availability of replacement fuses: American
fuses are not widely available in Europe, and 5x20 mm fuses are scarce
in the US. Worse, there are some 5x20 mm fuses in America built to
UL/CSA fuse curves; somebody's bad idea.
----------
From: Rick Busche
To: [email protected]
Subject: Concerning Fuses
List-Post: [email protected]
Date: Monday, October 20, 1997 6:46AM
I have a product which uses clip-in fuses on the primary side of a power
supply card. In order for this supply to be used in the US and European
markets I am looking for a fuse solution compatible with all regulatory
requirements. It is my understanding that UL/CSA require different
performance characteristics than found in the 5mm European styles.
1. Can US fuses be used to meet the regularly requirement of
Europe?
2. Are 5mm fuses REQUIRED to meet world wide applications? If so
must they also be used in secondary circuits?
3. It has been suggested that both fuses could be put in series. Is
this a solution?
Thanks in advance...
Rick Busche
Evans & Sutherland
[email protected]
