[sdiy] Reliable web site for capacitor packages & types

[Ove Ridé]

On 2 February 2012 03:44, Ove Ridé <nitro2k01 at gmail.com> wrote:
> On 1 February 2012 20:43, Jean-Pierre Desrochers <jpdesroc at oricom.ca> wrote:
>> Does anybody know a good web site that shows
>> good pictures of ALL the actual standard capacitor types
>> (ex: Polystyrene, Polyester, Metalized Polyester, etc..)
>> with their real packages ?
>> For an example:
>> On the net I saw a lot of false pictures of capacitors
>> named as Polystyrene type but they were actually
>> Polyester or something else..
>> This is very confusing when you sneak in your drawers
>> to find a specific type of capacitor and you are messed up
>> with the real package it should be in..
>
> This is not a trivial task. You can of course easily distinguish
> certain types of caps, say electrolytic ones vs ceramic disc caps, but
> when it comes to different plastic types, you have to rely on
> markings, which can be vendor-specific.
>
> Here's what the bottom looks on four capacitors I have lying around:
> <http://www.flickr.com/photos/gameboygenius/6804489847/in/photostream>
> Three of them are potted with an opaque resin, whereas one is potted
> with a transparent resin, interestingly enough. Just from seeing this,
> you never be able to figure out the dielectric.
>
> Like I said, you have to rely on the markings:
> <http://www.flickr.com/photos/gameboygenius/6804492645/in/photostream>
> The blue and green ones are ERO brand. You have the value and the
> voltage rating, but the other thing of note is the MKP and MKT
> designators. Google has an interesting tidbit of knowledge there:
>
> # Metallized plastic polypropylene (German: Metallisierter Kunststoff
> Polypropylen), a type of plastic-film capacitors (see also: Types of
> capacitors)
> # Metallized plastic polyester (German: metallisierter kunststoff
> polyester), a type of plastic-film capacitors (the last “T” is due to
> “P” been already used for “polypropylene” — see MKP). See also: Types
> of capacitors
>
> That's on the "disambiguation pages" for MKT and MKP.
>
> I have no clue which dielectric the gray one is using, but on the
> other side it says Rifa FS-capacitor PFE210GF. Googling for PFE210
> capacitor leads me to.
> http://www.evoxrifa.fi/aust_nz/obsolete_caps.htm
> There's a table that says:
>
> Old Type        Modern Replacement
> ...
> PFE210 (Note 1)         PFR, PHE426
>
> What does note 1 say?
> "Note 1: These types were made in polystyrene film which is no longer
> available from any source. Replacement types are made with
> polypropylene and have different electrical and physical
> characteristics."
>
> Since this is an official information source (Evox Rifa) I'm pretty
> confident that this is indeed a polystyrene cap.
>
> Then there's the orange one, I'm pretty sure this is a tantalum cap.
> After the F on the top, there's a line, indicating polarity. There's
> also a line on the right side of the orange one in the picture, which
> for some reason doesn't show up very well in the picture. Another
> giveaway from experience that this is a tantalum is the tall height
> and the orange color. From my biased experience, capacitors in a tall
> package like that and/or capacitors in a plastic package that are
> orange are often tantalum/electrolytes.
>
> If you can provide pictures of a few of your caps, I can try to do
> similar detective work for you.
>
> --
> /Ove

Forgot one little detail. The orange cap has a little SH logo, which I
looked up on the following page and it turned out to be a Siemens
brand cap.
<http://www.advanced-tech.com/ic_logos/ic_logos.htm>

-- 
/Ove

Blog: <http://blog.gg8.se/>

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