Help to bring cost down for 15 Caps

[CdDvdFlash]

Hi all, I have 15 capacitors to replace of varying voltage and uF I looked on RS Online but I can only buy them in the least of a 5 pack when I only need one or two or three of a type, so far I'm trying to get the price down from $47.10 and thats without postage so where online is a good place to buy caps in 1,2,3 or 4 at a time. They are all electrolytic caps and I'm choosing Nippon Chemi-Con or Rubycon or Nichicon etc. as long as they are good quality. I need the capacitors in a power supply for a friends DVD/VCR combo player so another question I have is, would all the capacitors be DC and not AC? Its for an LG RC689D I have a pic of the power supply below but all the capacitors are removed already and its had work done beforehand so I dont know if I should increase the voltage on all the caps in case this was done already. The highest value cap is 450V 68uF 85c from Samwha Im going to use all 105c instead.

[eccerr0r]

Re: Help to bring cost down for 15 Caps

here lies the dilemma, yes buying small quantities are expensive, especially those high voltage units. Electrolytic capacitors are generally for DC and PSU boards are for the most part using DC so that's not an issue. Question is why you're replacing the capacitors in the first place?

[mockingbird]

Re: Help to bring cost down for 15 Caps

I recommend contacting member Behemot who can hook you up with small quantites at a reasonable price and reasonable shipping.

[CdDvdFlash]

Re: Help to bring cost down for 15 Caps

Thanks Mockingbird but I'll buy them from my country to save time and holding delay, eccerrOr I have to replace the caps as the output voltages from the power supply are under and its stuck in a loop of the welcome message on the display and wont play DVD's

[kaboom]

Re: Help to bring cost down for 15 Caps

Don't forget to clean the PCB under the cap next to D127 & L127.
Looks like you've got dried electrolyte residue there.
Also check the traces on the back/bottom.
Isopropyl alcohol & a cotton swab should take care of it.

[clearchris]

Re: Help to bring cost down for 15 Caps

If you are doing small quantities your best bet is to find a local brick and mortar place. You can probably save a few bucks and skip replacing c103, those large caps tend to not go bad.

If you see yourself doing repairs going forward, it's much cheaper if you just start stocking the common vaules. Increase the voltage if feasible (price and physical size) so you don't end up stocking multiple voltage values.

[sam_sam_sam]

Re: Help to bring cost down for 15 Caps

I would add one more thing to this is if you are going to buy 1uf to 100uf I would recommend either 50 volt to 63 volts the lower voltage ones do not make sense to buy because most switching power supply requirements are 50 volts on rare occasions I have seen 63 volts or 100 volts

Most common UF are 1 , 2.2 , 4.7* , 10 , 22 , 33* , 39* , 47 , 56* , 100*
The ones that have an (*) are not very common but I have seen them on occasion have seen them being used

When I buy these capacitors I buy 100 at a time from Digikey because you get a price break on this quality and I will end up using them and buying another 100 when I order them again the only one that I do not do this is with the 100uf because they are more expensive I might 10 or 25 depending on the price

[CdDvdFlash]

Re: Help to bring cost down for 15 Caps

Ok, thanks guys my friend said he doesn't mind paying more for the good caps but now I have one query about ripple current, some are low about 920mA and another is high 2.48A unfortunately when I read about AC ripple current it didn't mention if low or high is better as an example one capacitor I need is 16V 2200uf 105c and the two links below are the ones I'm looking at they are basically the same except the ripple current:

https://au.rs-online.com/web/p/alumi...citors/0374433
and
https://au.rs-online.com/web/p/alumi...citors/7037501

here is the list I need to get:

16 volt, 2200uf, 105c
12.5mm diameter x 21mm high x 5mm leg spacing
(I need 3)

450 volt, 68uf, 105c
18mm diameter x32mm high x 7mm leg spacing
(I need 1)

25 volt, 1000uf, 105c
10mm diameter x 21mm high x 5mm leg spacing
(I need 2)

10 volt, 1000uf, 105c
10mm diameter x 13mm high x 5mm leg spacing
(I need 2)

16 volt, 100uf, 105c
5mm diameter x 11mm high x 5mm leg spacing
(I need 1)

10 volt, 220uf, 105c
5mm diameter x 11mm high x 5mm leg spacing
(I need 2)

25 volt, 100uf, 105c
6mm diameter x 12mm high x 5mm leg spacing
(I need 1)

25 volt, 470uf, 105c
10mm diameter x 17mm high x 5mm leg spacing
(I need 1)

35 volt, 33uf, 105c
5mm diameter x 11mm high x 5mm leg spacing
(I need 1)

50 volt, 47uf, 105c
6mm diameter x 11mm high x 5mm leg spacing
(I need 1)

So Sam I have 4 between the range of 1-100uf I'll use 50 volt

[mockingbird]

Re: Help to bring cost down for 15 Caps

You want the second link, which is Rubycon ZLH, as opposed to the first, which is NCC KMG. KMG is a general purpose series.