What capacitors are these?
 

Hoping someone can give me a little insight.. THis little capacitor board came with my sidewinder esc in a Rc10b4... for the life of me I can not find any information on the board or even the capacitors on it, im trying to figure out if I should replace them with the caps i have lying around (25v 330uF 105c low esr).

The capacitor reads
F
7x3b
331
16

The (what I think are) resistors read
Pj7D
sx34

Pics:
http://i152.photobucket.com/albums/s...6091431_01.jpg
http://i152.photobucket.com/albums/s...626091431a.jpg

Thanks, Ben



edit- holy crap my phone has an amazing camera :lol:

Do they have a temp rating?

Here they are for sale on Ebay

http://cgi.ebay.com/Ultra-low-ESR-Hi...3A1%7C294%3A50

Ben says none.

They look like some solid polymer capacitors... very durable, esc's should have been using them for years now. Lower esr, and smaller than standard liquid electrolytic caps.

Those aren't resistors, they're diodes.

As for the capacitors, they're solid electrolytic capacitors, which use polymer as electrolyte.

So use those or the 330uf caps I have?

Can someone explain what those diodes and resistors do in this application?
I have allways thought that capasitors are enought.

looks like the caps on my burned etti-boat esc and like the cap-board lutach showed in his esc-thread.

when it is delivered with your esc I suppose that it makes sense to use it!? otherwise they would'nt have used these. they won't do that just for fun.

flo

This is the one for the micro ESC:

http://i260.photobucket.com/albums/i...h/DSC01870.jpg
http://i260.photobucket.com/albums/i...h/DSC01855.jpg

This is the one for the others (As you can see they are 25V rated and has a higher capacity then the Hobbywing one you have Ben):

http://i260.photobucket.com/albums/i...h/DSC01875.jpg
http://i260.photobucket.com/albums/i...h/DSC01876.jpg
http://i260.photobucket.com/albums/i...h/DSC01877.jpg
http://i260.photobucket.com/albums/i...h/DSC01878.jpg
http://i260.photobucket.com/albums/i...h/DSC01879.jpg

Tested this, but they are a tad too big lol:

http://i260.photobucket.com/albums/i...h/DSC01872.jpg
http://i260.photobucket.com/albums/i...h/DSC01873.jpg
http://i260.photobucket.com/albums/i...h/DSC01874.jpg