Duncan: What you are looking for does not exist.  In order to obtain an
approval from a CENELEC testhouse according to IEC 127-2 (It should be 60127
by now) the fuse MUST meet the applicable standard sheet - this includes an
acceptable current rating.  In the case of  the Time-lag, High-breaking
capacity fuse, IEC 127-2, standard sheet 5 is applicable. Standard sheet 5
calls out ratings of .....5, 6.3 amperes - just as you have found.

If you will take a look at the time/current characteristic chart, and the
endurance test on standard sheet 5 I think you will find
one of these values fit your situation.

Note that UL will NOT "List" fuses that meet the IEC 127 time/current
characteristics but they will recognize them.  This is due to the fact that
the time/current characteristic shown in the UL standard are different.

Lou Aiken
27109 Palmetto Drive
Orange Beach, AL
36561 U.S.A.

tel        1-334-981-6786
fax       1-334-981-3054
mobile  1-334-979-4648
----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Friday, June 23, 2000 4:24 AM
Subject: Prefered Fuse Values


>
> Group,
>
>     I have an interesting problem with a mains filter and fuse. We have a
> product with a 6 amp filter that can draw  up to a maximum of about 5.8A.
The
> filter has a built in 20mm fuse holder and we would normally fit a T type
HBC
> fuse.
>
> The problem is that all fuses appear to be available in prefered values,
the
> nearest of which being 5 (too small) or 6.3 (too large)
>
> I'm sure that this is not the first time someone has encountered this so
your
> comments would be appreciated. Ideally we are looking for a 20mm 6AT HBC
fuse
> with european and UL approval or recognition. Does anyone know where I can
> obtain such a fuse?
>
> Many thanks is advance,
>
> Duncan Hobbs.
>
>
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>
>
>


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