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.

  • \$\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\$ Commented Jul 4, 2014 at 2:25
  • \$\begingroup\$ added picture for it \$\endgroup\$
    – user46769
    Commented Jul 4, 2014 at 3:02

1 Answer 1


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).


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.