Fuse voltage
 

I want to replace blown fuse (12V, 4A) that looks like resistor, but
the store only has (250V,4A) glass one, is it safe to use that?

BTW, the schematics says the line with fuse on it should use max 100mA,
so why would they put 4A fuse there?

"orange" wrote in message
ups.com...
I want to replace blown fuse (12V, 4A) that looks like resistor, but
the store only has (250V,4A) glass one, is it safe to use that?

BTW, the schematics says the line with fuse on it should use max 100mA,
so why would they put 4A fuse there?


If the original was really 100 milliamps and there was a 4A fuse in there
instead, someone did very wrong putting that value fuse in there. Under
certain failure conditions it could even cause a fire.

There's other possibilities, like a printing error in the schematic, a
silkscreen error on the board, etc.

Few pieces, and especially none that have motors, amplifiers, etc would use
a fuse as small as 100 mA.


Mark Z.

the schematics does not say what type of fuse it is.
Its a RGB port of computer and all that schematics say is that one
shouldn't connect anything wanting more than 100mA on that port and
that its F5 labeled fuse.
When I opened case and looked at fuse and searched net, I found out
that fuse should be 4A.

"orange" writes:

the schematics does not say what type of fuse it is.
Its a RGB port of computer and all that schematics say is that one
shouldn't connect anything wanting more than 100mA on that port and
that its F5 labeled fuse.
When I opened case and looked at fuse and searched net, I found out
that fuse should be 4A.

I don't think so. :)

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On 9 Aug 2005 03:37:45 -0700, "orange" wrote:

I want to replace blown fuse (12V, 4A) that looks like resistor, but
the store only has (250V,4A) glass one, is it safe to use that?

BTW, the schematics says the line with fuse on it should use max 100mA,
so why would they put 4A fuse there?


It's ok to use a higher voltage fuse. The fuse voltage is the maximum
voltage the fuse is guaranteed to be able to interrupt when it blows.
Andy Cuffe

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