Aerovox film capacitor

spencer · 5th February 2007, 02:55 PM

Any body know what is this film capacitor, PP or PS type? Any date sheet could be found?

Marking on body:
APC 30uF
240-0300
M/150 VAC
Assembled in Mexico

Thanks.

Sonusthree · 5th February 2007, 03:15 PM

A complete guess would be that it is a custom design for an APC uninterruptible power supply.
It doesn't seem to exist in the Aerovox catalogue although it may be an old type or pre ROHS.

http://www.aerovox.com/pdf/DC_Film_Axials.pdf
Cheers,
Martin.

spencer · 5th February 2007, 03:53 PM

Thank you Martin,

The plastic is dark blue and how can I know if it is Polyester or Polypropylene type? Thanks.

poynton · 5th February 2007, 05:38 PM

Why do you think it's Aerovox???

jacco vermeulen · 5th February 2007, 05:45 PM

Likely because Aerovox has a plant in Mexico that manufacturers foil capacitors.
Ping

For the voltage rating my guess would be GE.

Sonusthree · 5th February 2007, 05:48 PM

Quote:

Originally posted by spencer
The plastic is dark blue and how can I know if it is Polyester or Polypropylene type? Thanks.

Hi Spencer,
You can't really tell from the outside in this case I'm afraid.

You could measure capacitance change with temperature but it's not very practical.
I guess you'll just have to listen to them unless someone has any other ideas?

The Aerovox PDF does show that they use dark blue plastic.
(Not exactly exclusive to them but......)

Cheers,
Martin.

Apex Jr · 5th February 2007, 05:52 PM

I have some metalized polyprop caps made by Aerovox outer jacket is white also AC caps NP, Great caps ...

Steve @ Apex Jr.

spencer · 5th February 2007, 11:46 PM

The shop can show a box outsite with Aerovox printing but they got no idea what is the part number as there is no other label. Price is reasonable and thus I took 20 pcs to try.

I am listening them in my Jefet IV output coupling and it sound quiet good. Still breaking-in to third day.

Thanks,
Spencer

spencer · 6th February 2007, 12:36 PM

Martin,

Thanks for your charts and I figure out how to check whether the cap is PP and PS. The answer is Polyester as the capacitance increase with higher temperature.

Tools are capacitance meter and hot hair blower.

Spencer

Magura · 7th February 2007, 12:05 AM

The way to make sure what type of cap it is, is to take one apart and set a bit of the film on fire. Then blow out the flame and smell if the smoke smells sweet like a candle, then its a PP cap, polyester smells totally different, so does polystyrene.

Magura

5th February 2007, 05:38 PM	#4
poynton Magneto the Gravity Man diyAudio Member Join Date: Mar 2005 Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)	Why do you think it's Aerovox??? __________________ If it ain't broke, break it !! Then fix it again. It's called DIY !

5th February 2007, 05:45 PM	#5
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	Likely because Aerovox has a plant in Mexico that manufacturers foil capacitors. Ping For the voltage rating my guess would be GE. __________________ Looks like Sponge Bob has killed another thread.

7th February 2007, 12:05 AM	#10
Magura diyAudio Member Join Date: Oct 2003 Location: Denmark, Viborg	The way to make sure what type of cap it is, is to take one apart and set a bit of the film on fire. Then blow out the flame and smell if the smoke smells sweet like a candle, then its a PP cap, polyester smells totally different, so does polystyrene. Magura __________________ Everything is possible....to do the impossible just takes a little while longer. www.class-a-labs.com

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5th February 2007, 03:15 PM	#2
Sonusthree diyAudio Member Join Date: Dec 2005 Location: Brighton,UK	A complete guess would be that it is a custom design for an APC uninterruptible power supply. It doesn't seem to exist in the Aerovox catalogue although it may be an old type or pre ROHS. http://www.aerovox.com/pdf/DC_Film_Axials.pdf Cheers, Martin.

5th February 2007, 03:53 PM	#3
spencer diyAudio Member Join Date: Jun 2004 Location: Hong Kong	Thank you Martin, The plastic is dark blue and how can I know if it is Polyester or Polypropylene type? Thanks.

5th February 2007, 05:52 PM	#7
Apex Jr diyAudio Member Join Date: Jun 2002 Location: Torrance, Calif	I have some metalized polyprop caps made by Aerovox outer jacket is white also AC caps NP, Great caps ... Steve @ Apex Jr.

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