High-temperature cap replacement

Mar 09, 2009 5 Replies
C

The control chip in our oven has gone haywire, and I suspect the supply filter cap, a 220uF 25VW electro with a 125C temp rating. It's in a hot place! It filters the supply generated through two wirewound resisters dropping from 240V.



Is there a better replacement cap I can get for this purpose? Do tantalum caps withstand this temp better?



Otherwise where might I find (in Melb) a 125C rated cap without having to pay $10 in postage from Farnell etc? It doesn't seem to be the kind of thing stocked by the usual suspects.



Clifford Heath.


Vote
Twitter Facebook LinkedIn
D

Rockby have some 125 deg rated electros:

formatting link

No exact match, but a couple of the 68uF 40V axial jobs might do the trick if they fit.

Rockby are in Clayton.

Dave.

Vote
Twitter Facebook LinkedIn
E

Not likely either sadly. 105C is good enough for most apps.

Graham

Vote
Twitter Facebook LinkedIn
C

Perfect, David! Thanks for the pointer.

Still interested if anyone can answer whether other types might suit.

Vote
Twitter Facebook LinkedIn
F

On Mon, 09 Mar 2009 11:43:53 +1100, Clifford Heath put finger to keyboard and composed:

Look for a capacitor with a solid dielectric.

This series is targeted at industrial high temperature, automotive, military and space applications:

formatting link

? Extremely long useful life: 20 000 hours at 125 °C ? Extended high temperature range up to 200 °C ? Excellent low temperature impedance and ESR behaviour ? Charge and discharge proof, application with

0 ohm resistance allowed

Here are Vishay's Australian distributors/agents/sales offices:

formatting link

- Franc Zabkar

Please remove one \'i\' from my address when replying by email.
Vote
Twitter Facebook LinkedIn
C

Thanks all, the oven is working perfectly. Rockby had the exact part (220uF 25V 125degC), and they were less than a kilometre detour for my son this morning. WIN!

Clifford Heath.

Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required