03-26-2023, 09:29 PM
Rich
I have not understood:
1. D&A - digital and analog?
2. What is PC type? Never heard of it. There are SMT and Throughhole ones (from teh solderable types); the latter could be radial/axial. PC....not sure I know.
3. Whatever that PC type, I do not see anything otehr than the SMT pads in the footprint. Ubnless they are UNDER the soldered caps.
4. How old is the board? The newer el. caps, if from reputable capacitor house, are not known to me to be leaky, if sized up appropriately by the thermal regime/voltage. Thermal implies the ripple current, as well as the ambient temp. How do you know they are leaking?
5. If indeed the footprint is dual and accepts the TH caps, nothing wrong with them. However if they indeed are leaky, I would re-evaluate the voltage/temp/ripple current ratings, depending on where in the circuit they are.
The last thing: I would look at tantallum or ceramic caps of a proper size, which will likely fit in the footprint. Those will be good forever. Tantalum are better as ceramic ones, if soldered with iron, could develop cracks from thermal stress.
https://www.mouser.com/c/passive-compone...c=16%20VDC
These are 10uF 16V caps.
PS. Some tantalum caps have fairly sizeable ESR. Try for the low ESR ones. If possible, find out what kind of capacitor it is that you are changing, a GP or else, and go from there.
I have not understood:
1. D&A - digital and analog?
2. What is PC type? Never heard of it. There are SMT and Throughhole ones (from teh solderable types); the latter could be radial/axial. PC....not sure I know.
3. Whatever that PC type, I do not see anything otehr than the SMT pads in the footprint. Ubnless they are UNDER the soldered caps.
4. How old is the board? The newer el. caps, if from reputable capacitor house, are not known to me to be leaky, if sized up appropriately by the thermal regime/voltage. Thermal implies the ripple current, as well as the ambient temp. How do you know they are leaking?
5. If indeed the footprint is dual and accepts the TH caps, nothing wrong with them. However if they indeed are leaky, I would re-evaluate the voltage/temp/ripple current ratings, depending on where in the circuit they are.
The last thing: I would look at tantallum or ceramic caps of a proper size, which will likely fit in the footprint. Those will be good forever. Tantalum are better as ceramic ones, if soldered with iron, could develop cracks from thermal stress.
https://www.mouser.com/c/passive-compone...c=16%20VDC
These are 10uF 16V caps.
PS. Some tantalum caps have fairly sizeable ESR. Try for the low ESR ones. If possible, find out what kind of capacitor it is that you are changing, a GP or else, and go from there.
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