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I have a small buck dc-dc voltage converter that has two aluminium body capacitors mounted on the pcb surface. The top reads something like this: 220 HFP 1J9

Here's a photo of it... enter image description here

I want to know what is the max voltage for this capacitor. I see similar circuit boards that have 35v or 50v capacitors (mostly 35v) but how do I know the voltage rating of this capacitor.

I understand the meaning of 220 that is 220uf but what does HFP and 1J9 means?

Thanks in advance.

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  • \$\begingroup\$ Welcome! It might be helpful to provide a well-focused photo of any and all markings on the part. You can provide a link to it. \$\endgroup\$ – Spehro Pefhany Jul 4 '14 at 2:25
  • \$\begingroup\$ added picture for it \$\endgroup\$ – user46769 Jul 4 '14 at 3:02
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The photo is helpful. I suspect it's a Chinese part that is numbered similarly to the Panasonic FP series.

enter image description here

That would make it a 220\$\mu\$F/50V 105°C RoHS low-impedance part, size code "G" (10mm⌀\$\times 10.2\$mm tall)

Of course if it's not a genuine Panasonic part (and I don't think it is, the markings don't look like the Panasonic parts I have) the characteristics may not be the same (and chances are they will be, at best, equal).

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