APC UPS cap, suitable replacement?

[impala454]

I found a for sure bad cap in my old APC XS1500 UPS, it's a 22uF 400V 105deg electrolytic (CapX branded). Getting that exact value seems expensive, is there a another value I could get away with that's more readily available? It seems to be one of the main caps in the charging circuit (the part of the UPS that's malfunctioning).

[impala454]

Re: APC UPS cap, suitable replacement?

I see a 33uF on prime for $8, is that close enough?

[Curious.George]

Re: APC UPS cap, suitable replacement?

I see a 33uF on prime for $8, is that close enough?

Always meet or exceed the WVDC rating. Highest temperature rating you can afford (in a particular case size). You can also look at the durability rating (hours) for the device if its a PITA to replace (i.e., push the next expected failure date further out into the future).

If the cap is just being used to store charge (filter), then larger is usually safer.

[No doubt your cap sits on the rectified mains]

BE SURE TO CHECK PHYSICAL DIMENSIONS -- including lead spacing!

[R_J]

Re: APC UPS cap, suitable replacement?

Digikey, 22µf/400v $1.50 ~ $3.00

[Hitto]

Re: APC UPS cap, suitable replacement?

You can go higher (e.g. 47uF@400V) as least as the diode bridge is decently sized.

A Chemi-Con KXL is suitable for that purpose and its diameter will fit as it is a miniaturized series. It should not cost more than the price pointed out by R_J..