Author Topic: Definitive Capacitor Identification Chart (w pictures)?  (Read 8582 times)

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Offline free_electron

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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

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Offline ziplock9000

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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

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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 ziplock9000

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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

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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 ziplock9000

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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.
 

Online CatalinaWOW

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Re: Definitive Capacitor Identification Chart (w pictures)?
« Reply #31 on: January 22, 2017, 05:20:59 am »
Added a couple more.
 

Offline tpowell1830

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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

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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 »
 


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