Electronics > Repair
Can I replace this SMD electrolytic cap with a thru hole cap ?
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guix:
Hello,

I have this broken smd cap for a stepper motor driver on a 3d printer motherboard, unfortunately one leg is broken, and I don't have a similar capacitor at hand.

But I have thru hole capacitor of the same value (also marked "low esr, -40+105°C"), so can I use it instead or is it not recommended ?


TimFox:
It should work: how would you secure it mechanically?
David Hess:
It will work fine if you can figure out how to attach it.  I have done it by cutting the leads to leave just enough clearance to get a soldering iron tip to the pad, which is not the best mechanically, but good enough in most repair applications.
guix:
The pads on the board are also broken :)

I plan to place the capacitor laying on its side (like it is on the picture), solder the + to the diode just below and the - to the nearest ground (or I remove the silkscreen near the "creality" logo), making the legs as short as possible, then hot glue so it can't move

Thanks :)
erikbrenn:
Yes you can, but besides the capacitance beware its temperature and voltage rating. Also, some caps are low ESR for a reason.
I usually just use high temperature silicon to keep them in place.

For the broken pads you just need to scrape off some solder mask to find new copper.



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