Any reason not to replace electrolytic cap with ceramic?

[RevMen]

The schematic calls for a 40 micro-F, 450V and a few other similar values that are originally in a cap can. My local Fry's doesn't have an electrolytic that meets those values, but they do have a 1000 V ceramic 47,000 pF capacitor. Values-wise it matches, but are there other considerations that would mean I should seek out another electrolytic as a replacement?

 

[jaymanaa]

1,000,000 pf = 1uf


This means you would need a 47,000,000pf ceramic, which I don't think they make.

 

[Sir.Byrd]

I would only use Fry's as a last resort (order is missing a part and you have to return it to a customer that day sort of thing)
Try ordering from Mouser:
http://www.mouser.com:80/Passive-Co...Capacitors-Leaded/_/N-75hqw?P=1z0wrk9Z1z0vl82

 

[RevMen]

1,000,000 pf = 1uf


This means you would need a 47,000,000pf ceramic, which I don't think they make.

I forgot nano! I've been out of school too long.

Thanks.

 

[jaymanaa]

I forgot nano! I've been out of school too long.

Thanks.

Don't feel bad, I use the online calculators.

 

[gadget73]

BTDT

and yeah, ceramics don't exist in values that large. Non-polar caps in that value are around, but they are quite large physically and a fair bit more expensive than an electrolytic.