Author Topic: Definitive Capacitor Identification Chart (w pictures)?  (Read 16214 times)

0 Members and 1 Guest are viewing this topic.

Offline free_electron

  • Super Contributor
  • ***
  • Posts: 8515
  • Country: us
    • SiliconValleyGarage
Re: Definitive Capacitor Identification Chart (w pictures)?
« Reply #25 on: January 19, 2017, 04:36:03 am »
What's next?

The definitive transistor identification chart,

the definitive ___________ identification chart?  >:D

The definitive  pantone 768 red, pvc from dupont type r97-3j, insulated, 0.3mm wall with 2% tolerance , thermoplastic ,onyx-chemicals type plu-5-d pantone 907 white ink 9 dot matrix printed legend, ul listed, 105 degree c , stranded 98% oxygen free copper , 12 strands , twisted on a 1 inch turnlength , on 500 m rolls from belkin produced on 27 february 2001 at 19:47pm from factory nine , lot 5007 and handled by operatur yu-chen with 204 meters remaining on the roll ... wire guide ...  ( i have one reel of that )
Professional Electron Wrangler.
Any comments, or points of view expressed, are my own and not endorsed , induced or compensated by my employer(s).
 

Offline ziplock9000Topic starter

  • Regular Contributor
  • *
  • Posts: 173
  • Country: gb
Re: Definitive Capacitor Identification Chart (w pictures)?
« Reply #26 on: January 19, 2017, 09:24:29 am »
I've added some more higher resolution images to the wiki that need identification.
 

Offline bktemp

  • Super Contributor
  • ***
  • Posts: 1616
  • Country: de
Re: Definitive Capacitor Identification Chart (w pictures)?
« Reply #27 on: January 19, 2017, 11:08:13 am »
Having so many similar images (all the blue/brown/reddish capacitors) probably doesn't help much. They are all film capacitors, but the exact construction and material is often impossible to identify without having the datasheet.
Sometimes there is some text on the capacitors like PP. MPP, or MKP. Then it uses most likely polypropylene film for reduced losses, otherwise it is probably polyester film.

Also there are many types of electrolytic capacitors. If you can identify the manufacturer you may be able to find a datasheet, otherweise you often only know it is an electrolytic capacitor with xxV and yyuF, but you can't say if it is a low ESR, a general purpose one or some more specialised type unless you know exactly the circuit where it came from and have enough experience to tell what type of electrolytic capacitor is needed for the specific application.
 

Offline ziplock9000Topic starter

  • Regular Contributor
  • *
  • Posts: 173
  • Country: gb
Re: Definitive Capacitor Identification Chart (w pictures)?
« Reply #28 on: January 19, 2017, 12:01:48 pm »
Having so many similar images (all the blue/brown/reddish capacitors) probably doesn't help much. They are all film capacitors, but the exact construction and material is often impossible to identify without having the datasheet.
Sometimes there is some text on the capacitors like PP. MPP, or MKP. Then it uses most likely polypropylene film for reduced losses, otherwise it is probably polyester film.

Also there are many types of electrolytic capacitors. If you can identify the manufacturer you may be able to find a datasheet, otherweise you often only know it is an electrolytic capacitor with xxV and yyuF, but you can't say if it is a low ESR, a general purpose one or some more specialised type unless you know exactly the circuit where it came from and have enough experience to tell what type of electrolytic capacitor is needed for the specific application.
Any chance you could add that information to the wiki as I'm not sure which you're referring to. Thanks.
 

Offline bktemp

  • Super Contributor
  • ***
  • Posts: 1616
  • Country: de
Re: Definitive Capacitor Identification Chart (w pictures)?
« Reply #29 on: January 19, 2017, 01:08:57 pm »
I have added text to most of the capacitors.
All pictures of film capacitors above the MPP polypropylene one are very similar. I doubt all of them are needed, because they all have the same colour and shape and no other unique features.
Instead of adding more and more pictures, it would be better to arrange them in groups and add some more information on how to distinguish between the capacitor types.
 

Offline ziplock9000Topic starter

  • Regular Contributor
  • *
  • Posts: 173
  • Country: gb
Re: Definitive Capacitor Identification Chart (w pictures)?
« Reply #30 on: January 19, 2017, 02:28:43 pm »
I have added text to most of the capacitors.
All pictures of film capacitors above the MPP polypropylene one are very similar. I doubt all of them are needed, because they all have the same colour and shape and no other unique features.
Instead of adding more and more pictures, it would be better to arrange them in groups and add some more information on how to distinguish between the capacitor types.
Thanks, your help is appreciated. Ultimately that's what will happen once we know some are the same.
 

Offline CatalinaWOW

  • Super Contributor
  • ***
  • Posts: 5173
  • Country: us
Re: Definitive Capacitor Identification Chart (w pictures)?
« Reply #31 on: January 22, 2017, 05:20:59 am »
Added a couple more.
 

Offline tpowell1830

  • Frequent Contributor
  • **
  • Posts: 863
  • Country: us
  • Peacefully retired from industry, active in life
Re: Definitive Capacitor Identification Chart (w pictures)?
« Reply #32 on: January 22, 2017, 09:12:20 am »
What's next?

The definitive transistor identification chart,

the definitive ___________ identification chart?  >:D

Sure why not, resistors, op amps, (add your own)... 

However, Ziplock, this is a huge undertaking, but I think it is a great idea and needs doing. Learn a treasure as you go as well.
This what the internet is for...

PEACE===>T
PEACE===>T
 

Offline Vtile

  • Super Contributor
  • ***
  • Posts: 1144
  • Country: fi
  • Ingineer
Re: Definitive Capacitor Identification Chart (w pictures)?
« Reply #33 on: January 22, 2017, 09:24:29 pm »
Here is one a bit more exotic for these days. It is "SuperElectric" (must be manufacturers brandname) 10000pF = 10nF and 2000Vdc Trolitul capacitor from somewhere WW2 era +-10 years propably. This is not paper or wax condensator, but a polystyrene.

TROLITUL
n. Poly(styrene), manufactured by Dynamit Nobel, Germany.
http://link.springer.com/referenceworkentry/10.1007%2F978-0-387-30160-0_11940

I I don't know how these ages, the typical min/max frequenzy limits given for polystyrene by Electronics Engineer's Reference Book (through google books) is given DC up to 10 GHz (10000 MHz).
« Last Edit: January 22, 2017, 09:49:22 pm by Vtile »
 

Offline Pedro26

  • Newbie
  • Posts: 1
  • Country: gb
Re: Definitive Capacitor Identification Chart (w pictures)?
« Reply #34 on: May 07, 2022, 10:58:48 am »
Does the Wiki still exist? I used to have printed copies of the catalogues for RS components, Farnells, CPC, and Maplins, and with them I could identify most capacitors I came across, often their manufacturer too. Unfortunately, these ‘disappeared’ following a house move, a big loss when dealing  with legacy electronics.
« Last Edit: May 07, 2022, 11:00:28 am by Pedro26 »
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf