Badcaps.net Forum
Go Back   Badcaps Forums > General Topics > General Capacitor Questions & Issues
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 05-21-2017, 08:59 AM   #1
LEEDASH
Badcaps Veteran
 
Join Date: Dec 2012
City & State: Bedford
My Country: Bedfordshire
I'm a: Knowledge Seeker
Posts: 406
Default Caps question

Hi can you use capacitor that are smaller than original,but same values ?
LEEDASH is offline   Reply With Quote
Old 05-21-2017, 09:00 AM   #2
aztekk
Member
 
aztekk's Avatar
 
Join Date: Dec 2015
City & State: MN
My Country: USA
Posts: 22
Default Re: Caps question

Yes.
aztekk is offline   Reply With Quote
Old 05-21-2017, 09:02 AM   #3
LEEDASH
Badcaps Veteran
 
Join Date: Dec 2012
City & State: Bedford
My Country: Bedfordshire
I'm a: Knowledge Seeker
Posts: 406
Default Re: Caps question

100% the original ones have 'v9a pet,but the replacements do not have,is that manufacture mark ?
LEEDASH is offline   Reply With Quote
Old 05-21-2017, 09:17 AM   #4
LEEDASH
Badcaps Veteran
 
Join Date: Dec 2012
City & State: Bedford
My Country: Bedfordshire
I'm a: Knowledge Seeker
Posts: 406
Default Re: Caps question

.
Attached Images
File Type: jpg image.jpg (545.5 KB, 35 views)
LEEDASH is offline   Reply With Quote
Old 05-21-2017, 09:32 AM   #5
aztekk
Member
 
aztekk's Avatar
 
Join Date: Dec 2015
City & State: MN
My Country: USA
Posts: 22
Default Re: Caps question

I've seen those caps on a Vizio TV, though they were blue there. They are made by a company called "Samwha". PET stands for Polyethylene terephthalate. Anyway I replaced them for Panasonic FM series caps I had left over from from another recap, they worked fine in my case.
aztekk is offline   Reply With Quote
Old 05-21-2017, 03:31 PM   #6
mariushm
Badcaps Veteran
 
Join Date: May 2011
City & State: Romania
Line Voltage: 230VAC 50Hz
I'm a: Hobbyist Tech
Posts: 3,662
Default Re: Caps question

PET refers to the sleeve material on the capacitor .. some are made out of PET, others are made using other materials.
V9A is just some internal product code like batch number, manufacturing week etc

You should use capacitors which have the same ESR (in datasheets, you can look at impedance at 100kHz @ some positive temperature ) or slightly lower (compared to original capacitor) and current ripple value equal or slightly higher.

You can replace a capacitor with one that has same capacitance but higher voltage rating (ex replace 25v rated capacitor with 35v rated capacitor)

In the same series, capacitors that have a bigger volume (diameter x height > older capacitor's diameterxheight) will typically have slightly lower ESR and higher current ripple values...


The series is important.. for example, if the circuit requires very low ESR capacitors, you couldn't replace a Panasonic FM or FR capacitor with a Panasonic FC series capacitor. The ESR of a Panasonic FC series capacitor would be much higher compared to the other series - the circuit may work after repair but the new capacitor may be "abused" and go bad prematurely, or the circuit may be unstable (turn off and on when it reaches some temperature or reboot itself when chips exceed a certain power consumption, or cause other problems).
mariushm is offline   Reply With Quote
Old 05-25-2017, 05:41 AM   #7
Behemot
Badcaps Veteran
 
Behemot's Avatar
 
Join Date: Dec 2009
City & State: Prague, 504'52.22"N, 1423'30.45"E
My Country: CZ
Line Voltage: 230 V/50 Hz
I'm a: Knowledge Seeker
Posts: 4,437
Default Re: Caps question

There is always some tolerance so going from low-ESR to standard is bad, sure, but going from one low-ESR series to another with slightly different specs makes little to no difference.
__________________
Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts

Exclusive caps, meters and more!
Hardware Insights - power supply reviews and more!
Behemot is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums 2003 - 2019
Powered by vBulletin ®
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 05:32 AM.
Did you find this forum helpful?