Supplier of replacement motherboard caps in UK wanted...

P

Phil Vossler

Guest
Following on from the "stolen electrolyte" fiasco...

see "http://www.spectrum.ieee.org/WEBONLY/resource/feb03/ncap.html".

We have a pile of p.c. motherboards and power supplies that have
suffered from the swollen & leaky capacitor syndrome. We would like to
be able to source replacement parts. Many of the components are 10mm and
12.5mm diameter components of quite high values (e.g. 4700uF, 16V, 105
degree C, 12.5mm dia) and these are unavailable from our usual
suppliers, RS & Onecall (Farnell).

Can anyone suggest alternative suppliers for these items (preferably
based in the UK).

Thanks!


Phil Vossler
Electronics Workshop
School of Physics
University of Exeter
 
I repair motherboards ...done thousands.. There is no commercial source,
it's that simple.
the only place to get these sizes and ratings are from other motherboards...
I have spent hours to confirm this..
When I scrap a board, I save the components, capacitors mosfet, chips, etc.
for future use.


"Roger Hamlett" <rogerspamignored@ttelmah.demon.co.uk> wrote in message
news:WzKkd.69$yP5.10@newsfe5-gui.ntli.net...
"Phil Vossler" <p.j.vossler@exeter.ac.uk> wrote in message
news:cmvqe6$6j4$1@south.jnrs.ja.net...
Following on from the "stolen electrolyte" fiasco...

see "http://www.spectrum.ieee.org/WEBONLY/resource/feb03/ncap.html".

We have a pile of p.c. motherboards and power supplies that have
suffered from the swollen & leaky capacitor syndrome. We would like to
be able to source replacement parts. Many of the components are 10mm and
12.5mm diameter components of quite high values (e.g. 4700uF, 16V, 105
degree C, 12.5mm dia) and these are unavailable from our usual
suppliers, RS & Onecall (Farnell).

Can anyone suggest alternative suppliers for these items (preferably
based in the UK).
Personally, I'd look through the Digi-Key catalogue in the US. They send
'overnight' if the item is in stock. However the capacitor you describe is
a vey unusual part. The 'standard' size for _minature_ 4700uF capacitors,
is 16mm diameter. I think 12mm, might be available in the Panasonic 'FC'
range. There have been a couple of ranges of smaller parts that have
disappeared from the market in the last few months, so finding these may
be hard. Most 'low ESR' capacitor ranges needed for switch mode supplies,
are limited by the internal resistances of the plates themselves, and the
leads, and so generally 2 off of a smaller capacitor will be used in
parallel to reduce the ESR even more. As such ranges like the Sanyo OSCON
capacitors, which offer a lot of capacitance in a small case, don't do
sizes like this. Rapid electronics do the OSCON range, and may help for
all but the biggest value units.
It may well be that the failures have less to do with faulty electrolyte,
than with trying to push components too far...

Best Wishes
Click to expand...
 
"Guylaine J. Parisien" <parisien6006@rogers.com> wrote in message
news:qYWdnVfNtYD1YbTfRVn-uQ@rogers.com...

Top poster ---- PLONK!
 
"Phil Vossler" <p.j.vossler@exeter.ac.uk> wrote in message
news:cmvqe6$6j4$1@south.jnrs.ja.net...
Following on from the "stolen electrolyte" fiasco...

see "http://www.spectrum.ieee.org/WEBONLY/resource/feb03/ncap.html".

We have a pile of p.c. motherboards and power supplies that have
suffered from the swollen & leaky capacitor syndrome. We would like to
be able to source replacement parts. Many of the components are 10mm and
12.5mm diameter components of quite high values (e.g. 4700uF, 16V, 105
degree C, 12.5mm dia) and these are unavailable from our usual
suppliers, RS & Onecall (Farnell).

Can anyone suggest alternative suppliers for these items (preferably
based in the UK).
Personally, I'd look through the Digi-Key catalogue in the US. They send
Click to expand...
'overnight' if the item is in stock. However the capacitor you describe is
a vey unusual part. The 'standard' size for _minature_ 4700uF capacitors,
is 16mm diameter. I think 12mm, might be available in the Panasonic 'FC'
range. There have been a couple of ranges of smaller parts that have
disappeared from the market in the last few months, so finding these may
be hard. Most 'low ESR' capacitor ranges needed for switch mode supplies,
are limited by the internal resistances of the plates themselves, and the
leads, and so generally 2 off of a smaller capacitor will be used in
parallel to reduce the ESR even more. As such ranges like the Sanyo OSCON
capacitors, which offer a lot of capacitance in a small case, don't do
sizes like this. Rapid electronics do the OSCON range, and may help for
all but the biggest value units.
It may well be that the failures have less to do with faulty electrolyte,
than with trying to push components too far...

Best Wishes
 
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