R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Thread Tools Search this Thread
Old 11-26-2009, 01:31 PM   #1
Tech Elite
pakk's Avatar
Join Date: Mar 2009
Posts: 3,077
Trader Rating: 79 (100%+)
Default capacitors

is a capacitor a capacitor? Can I go to radio shack and get any capacitor and use it on my ESC as long as it has the right ratings?

*Photon* *SC10 4x4*
pakk is offline   Reply With Quote
Old 11-26-2009, 01:49 PM   #2
Tech Elite
Johnny Wishbone's Avatar
Join Date: Feb 2006
Posts: 3,419
Trader Rating: 6 (100%+)

As long as you don't get one that is too low rated voltage and as long as its a polarized cap you should be ok.
Johnny Wishbone is offline   Reply With Quote
Old 11-26-2009, 02:05 PM   #3
Tech Regular
Capt'N_Slow's Avatar
Join Date: Aug 2008
Location: Calgary
Posts: 454
Trader Rating: 10 (100%+)

if you are searching for a replacement unit. I would use the existing capacitor specs if they are readable and see if the local electronics store has something that matches.

If you are wanting to try something different from what is supplied by the manufacture.

General Rules of Thumb:
- LOW ESR CAPACITOR (Lower the better)
- 1000uF to 5000uF is perferable for general purpose use.
- 10V for 2s lipo or 16v for 3s lipo
Capt'N_Slow is offline   Reply With Quote
Old 11-26-2009, 02:07 PM   #4
Tech Elite
tom_chang79's Avatar
Join Date: Jul 2008
Location: Southern California
Posts: 2,591
Trader Rating: 13 (100%+)

Primarily, you're looking for one that has the same or higher WVDC. That's really your break-down voltage.

You also want the same capacitance.

Polarized, that's up to you. It's just certain TYPES of capacitors are inherently polarized, such as Electrolytic (the most common ones you find on ESCs), Tantalums, and etc...

But usually, for the same capacitance, a capacitor with a higher WVDC rating would be generally larger in size...

The stuff that you find on brushed motors, those are monolithics, they're not polarized since it's usually an enamel-coated, ceramic surface-mount chip cap that has leads coming out of it...
tom_chang79 is offline   Reply With Quote
Old 11-27-2009, 08:59 AM   #5
Tech Elite
Toh WL's Avatar
Join Date: May 2006
Location: Setapak
Posts: 3,567
Trader Rating: 6 (100%+)

Just be very carefull, try not connect your battery pack to ESC in reverse polarity. It eventually kill the ESC & the electrolyte cap will burst with flame or fume.
Toh WL is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are On
Pingbacks are On
Refbacks are Off

All times are GMT -7. It is currently 01:19 PM.

Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net