Electronics > Projects, Designs, and Technical Stuff
capacitor replacement type
Crambone:
I'm looking for the following 2 capacitors but I'm unable to locate is there some other type I could use or anywhere I can find them?
1) .0056 mfd 125V 5% POLY
2) .0062 mfd 500V 5% POLY
TimFox:
"Poly" is an insufficient description. Do you mean polyester (polyethylene terephthalate or Mylar), polypropylene, polystyrene, polysulfone, or some other plastic film?
Polypropylene is a good choice, if you have the space, and can be had in 5% tolerance. Polyester is a common choice for non-critical applications, but usually has a broader tolerance.
Try the search engine at a distributor, for example https://www.mouser.com/Passive-Components/Capacitors/Film-Capacitors/_/N-9x371?P=1yznbzsZ1z0wppwZ1yx4atuZ1yzs9nv for a 5.6 nF, 5% polypropylene capacitor. You will have to choose a different working voltage: what DC voltage is actually present in the circuit? If you don't know, then go higher. Do not search with the obsolete term "mfd", since the modern meaning of "mfd" (millifarad) is 1000 times higher than what you want (microfarad).
bdunham7:
--- Quote from: Crambone on July 18, 2020, 11:02:23 pm ---I'm looking for the following 2 capacitors but I'm unable to locate is there some other type I could use or anywhere I can find them?
1) .0056 mfd 125V 5% POLY
2) .0062 mfd 500V 5% POLY
--- End quote ---
It would help to know what they are for, but try looking for 5600pF and 6200pF (or thereabouts--in many applications a little more won't matter).
Crambone:
They are for a Sencore TC162 tube tester
H713:
You might not find 125V and 500V parts, but you can probably find higher voltage rated parts. For 6.2 nF (same as .0062 mfd), Digikey only has 1.6 kV rated parts. That will be just fine. 5.6 nF they had 400V parts.
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