I have a budging capacitor rated at 1500uf 35V I found in a power supply. I don't have any spares to replace it at the moment, but I do have 3 rubycon capacitors rated at 470uf and 35V each. Would putting these three capacitors in parallel be a suitable replacement?
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Re: Capacitance equivalence replacement
'fraid not. The voltage across each component remains the same. -
Re: Capacitance equivalence replacement
Ignore the above post.
When in parallel, the voltage remains the same.
When in series, the voltage gets split between the capacitors, for ex 3 x 1500uF 16v capacitors in series will behave as a single 1500uF 48v capacitor.
So you can put 3 x 470uF 35v in parallel to get a ~1400uF 35v capacitor.
Now should you? If you want just to test if it fixes the problem, yeah, go for it.
For permanent fix, no, it's not a good idea for mainly two reasons:
* the 470uF are less capable of handling a lot of current and ripple (if the 1500uF was chosen for high ripple capability, these 470uF may go bad fast)
* using 3 capacitors you'd have to use some wires or leave the leads long - the long will cause some inductance and increase the ESR, which may affect the switching power supply.Comment
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Re: Capacitance equivalence replacement
In my experience you should be better off with those three caps, than a swollen capacitor.Suitable is what suits you. Obviously the value of your replacement would be down 90mfd. Your original capacitor is almost certainly reading less than that.Myself, if stuck woulld use them, but only as a temporary measure space permitting.Comment
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Re: Capacitance equivalence replacement
Lol, I misread the voltage. Apologies.Comment
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