Power Supply Capacitor

[cropwell]

You can buy cheap Chinese capacitors from China, or you can buy expensive Chinese capacitors from RS or Farnell. It is your choice depending on your perception of quality and service.

[magicniner]

One large cap just means there is just one large component which, when it fails, will render your PSU broken.
Provided the conductor area of the connecting bus is large and it's length is short there is no reason not to use several smaller caps in parallel, but buy branded quality from a reputable supplier,

- Nick

[cropwell]

I am partly retracting my former statement in the light of this article http://www.hardwaresecrets.com/how-t...ic-capacitors/

Rob

[Clive S]

Rob at our time of life if they last 10 years it's a bonus

[JAZZCNC]

Rob at our time of life if they last 10 years it's a bonus

Ten more yrs.!!! . . . . Now't like being optimistic.

[Boyan Silyavski]

You can buy cheap Chinese capacitors from China, or you can buy expensive Chinese capacitors from RS or Farnell. It is your choice depending on your perception of quality and service.

Its absolutely not like you present it.

[cropwell]

Its absolutely not like you present it.

If you read my previous post, you will see that I have added information to enable a buyer to make an informed choice. Chinese (and Taiwanese) goods are made as cheaply as possible. This affects quality and in some instances safety. Brand forgery is rife. It does not stop major UK suppliers buying them for sale in UK and, for the time being, in Europe. Major suppliers are not immune from fakes creeping into the supply chain.

I have seen many instances of failed power supplies, with capacitors bulging with internal gassing, on the brink of spectacular failure. These are not always Chinese components.

Japanese capacitors are generally a better quality product, but to me it is a price based decision. I agree with Jazz, that in most instances where a capacitor is not stressed, it will do the job for a reasonable service life, wherever it was born.

Rob

[Clive S]

Well said Rob

[Boyan Silyavski]

Well said may be,but i would not put a chinese capacitor in my audio or my cnc for the sake of saving what, almost nothing.

Just an example of what happens if you buy the "Hitachi" capacitor from ebay. Which is just a couple of euros cheaper than a real one from Mouser. See what a guy that bough it says and at bottom the guy that distributed them.


I just don't know what exactly you are promoting here guys? You want to be right for the sake of rightness or what?


Its one thing pointing people to buy chinese spindle, VFD or similar where substantial savings are made, and other thing pointing them to buy crap to save a $ for a beer. So sb will spend 3000 euro for 900x600 DIY router and will save 5 euro from capacitors?

[JAZZCNC]

Its one thing pointing people to buy chinese spindle, VFD or similar where substantial savings are made, and other thing pointing them to buy crap to save a $ for a beer. So sb will spend 3000 euro for 900x600 DIY router and will save 5 euro from capacitors?

Boyan while I agree upto point with what your saying where do you stop with the " For few ££££ more" this is better.? This could be said about every part and aspect of the CNC machine .!

Lets keep it relavant with the The point being that for DIY CNC if Sized correctly even the Cheap Caps are plenty good enough. For Hi-usage Industrial CNC or HiFi then maybe not but this is DIYCNC. £5 x 3 (Pounds because EU won't deal with us anymore!!! ) saved on something that 99% chance won't fail is enough saving.

Then you have the other way to look at it.? If worst happens and "one" fails it's cheap, available and easy to replace. The other two will keep you running until replacement arrives. . . . . If ONE BIG one goes Boom then your dead in the water.!